Few realize that it has greater potential outside of everyday meal prep. Germinating weed seeds is the essential first step in growing. We show 5 methods how to germinate weed seeds, including our method with 99% success rate ! This marijuana germination tutorial is different. Get exact steps from beginning to end (with pictures!) so your germination goes fast and seedlings start strong!
Using an Instant Pot to germinate cannabis seeds
Kitchen tools have been modified, evolving over the years to make some of the most difficult cooking tasks just a little bit easier. You no longer have to knead your own bread or stand over a painstakingly hot oven while stirring a slow cooking stew or chili because we’ve got innovative new tools that can do all of the hard work for us.
The latest trendy kitchen tool is the Instant Pot, a device that can cook a whole chicken breast dinner in under 20 minutes with less than half of the dirty dishes you’d make doing things the old-fashioned way. It’s been a hit with personal chefs everywhere, but few realize that it has greater potential outside of everyday meal prep.
How it works
The Instant Pot is great at cooking just about anything you’d normally make in an oven or on the stove, and it turns out that it’s also the perfect tool for cannabis growers who want an edge in the process of germination. This is because the device is capable of reaching the ideal temperatures for tropical plant species seeds to flourish. Of course, it only works in the right setting because cooking marijuana seeds would render them useless, but with the help of a medium, an Instant Pot, makes a perfect germination pod.
Why you might want to try it
You might be a bit wary of locking your cannabis seeds away in a tool that you used to properly cook last night’s dinner, but there are many reasons why this method is a great choice for both beginners and experienced cultivators alike.
The temperature and humidity maintained in the Instant Pot are perfect, so you don’t have to worry about your seeds drying out, and it will also make them more likely to sprout.
The environment inside of the Instant Pot can speed up the process of germination by anywhere from 1-5 days
Step by step instructions
Are you convinced yet? If so, then it’s important that you do things the right way, otherwise, you could wreck a whole pack of cannabis seeds in minutes accidentally. To guide you, we’ve included a helpful list of step-by-step instructions, all of which should result in germination success.
- 1 Ziploc bag or Tupperware container
- 1 Instant pot
- 1-15 cannabis seeds
- Paper towel
Open the Ziploc bag or container wide and then slide a thin paper towel that’s
been folded inside, ensuring that it can comfortably close by folding the excess hanging bits inwards.
Use a misting bottle to dampen the paper towel, and then spread your cannabis seeds evenly across the sheet.
Add another double layer of paper towel followed by enough water to hold everything in place without having it dripping over the edges or out of the bag/container.
Close but do not seal the Ziploc baggie/container and then set it in the middle of the Instant Pot basket.
Shut the lid, and then set the Instant Pot to the yogurt setting which should maintain a nice 33°C.
Leave the marijuana seeds to germinate overnight, and by morning you should have nice, healthy sprouts beginning to show.
This method always works in 24 hours or less, so if you go beyond that length of time, then your seeds might not be suitable for growing.
How to successfully germinate old cannabis seeds
The thing is, that even if you are having difficulty germinating old seeds, there are several things you can do to achieve a higher success rate.
How to Germinate Weed Seeds
(99,9% Success Rate)
This is the complete guide on how to germinate weed seeds.
In today’s guide you’ll learn:
- What germination is
- 5 methods how to germinate your seeds
- How long the process takes
- Common mistakes
- Lots more
In short: if you want to learn successfully germinate your precious marijuana seeds, you’ll love this new guide.
Don’t have time to read the guide right now?
No worries. Let me send you a copy so you can read it when it’s convenient for you. Just let me know where to send it (Takes only 5 seconds).
- Don’t learn it the hardway
- What is germination, anyway?
- Germinating weed seeds
- Germinate weed seeds: get the basics right
- Germination methods
- How long does the germination process take?
- When can I pot my seedlings?
- Common germination mistakes
- Germinate away
Don’t Learn it the Hardway
A long time ago, as first-time growers, we had no idea what we were doing. It was overwhelming and tempting to skip over this first phase; we were excited for the result, after all.
We had to learn the hard way, but a high-quality seed is only as good as the growing circumstances and the environment you provide.
The germination process is where it all begins.
It turns out that germinating weed seeds isn’t all that difficult.
With a little know-how and preparations, you’ll be well on your way to being a successful parent to a little seedling.
In a hurry today?
Let’s start with a tip:
Shortcut to 99,9% Succes Rate
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Want to know what Germination Method our Seed Breeders use?
Ps. Read the rest of this guide later: we share our growth hack!
What Is Germination, Anyway?
Once you’ve planted a weed seed, it goes through a period of dormancy. When the seed splits or shows a root, this indicates successful germination. This occurs under specific conditions that involve:
- Temperature control.
How successful the germination process is depends on the conditions mentioned above. For example, if there’s not enough water, the seed won’t germinate.
Conversely, too much water can virtually drown the seed by restricting its access to oxygen.
When the needs of the seed (see what we did there?) are met, the first thing it does is take in oxygen and water. Its coating will break, or pop, open and a root will emerge.
A single plant shoot then appears to finalize the process.
Such a simple process! Once you have the basics down, you’re ready to tackle that first seed.
Germinating Weed Seeds
From seed to harvest, a marijuana species go through a specific set of steps that ensure a fruitful result.
In brief, they are:
- Choosing your seed.
- Germination: 3-7 days.
- Vegetative: 1-2 weeks.
- Flowering: 8-11 weeks.
- Harvesting/drying: 1-3 weeks.
- Choosing your seed.
- Germination: 3-7 days.
- Seedling: 2-3 weeks.
- Vegetative: 3-16 weeks.
- Flowering: 8-11 weeks.
- Harvesting/drying: 1-3 weeks.
On average, the entire process takes around 3–5 months, sometimes longer, depending on the species and if you’re growing indoors or out. The latter tends to take more time, given the conditions are much less controllable.
Germinate Weed Seeds: Get the Basics Right
Nailing the basics sets you up for a good grow and successful germination from the get-go. One of our primary concerns here is the quality of seed.
What makes a premium weed seed?
- Color: The best weed seeds will be light to dark brown. Green seeds indicate they were harvested early and/or contain no embryo inside — useless!
- Texture: Look for seeds that are hard to the touch. Soft, squishy ones indicate they’re not ready for planting.
- Storage: Any seeds you purchase should be kept at a temperature of around 71-77 ℉ /21-25 ℃
In regards to other conditions, lighting won’t be such an issue just yet, as germinated seeds won’t require it until the root has popped and the first plant shoot has appeared.
You may be wondering if size plays a role as well?
As tempting as it may be to assume the seed’s size is equivalent to how large the plant will be, don’t do it.
For example, a small Sativa seed might turn into a monstrous species once grown.
Now for the juicy stuff! Today, we focus on five different options to choose from, depending on your needs and available resources:
- Glass of water.
- Wet towel.
- Directly in soil.
- Stone wool blocks.
- Using the Spongepot starter kit.
Method 1: Glass of Water
Also referred to as “pre-germination,” this method involves soaking the seeds in water. It’s used particularly for older seeds to try and “wake” them up.
- Soak the seeds: Soak your seeds in lukewarm, chlorine-free water overnight.
- Float or sink: Seeds that initially float show better chances of surviving.
- Check for germination: You’ll see that a white root has “popped” or germinated. This should happen within 1 to 3 days.
- Retrieve your seeds: Gently remove the seed and dry it on a kitchen towel.
- May be able to revive old seeds
- Should only be attempted with seeds that might die otherwise.
- despite 1 to 3 days being the norm on average, in practice, this can sometimes take up to 7 days.
Method 2: Wet Towel
Similar to the method above, using a wet towel is another pre-germination method.
- Wet a paper towel: Do so until it’s completely covered but not dripping.
- Fold your seeds inside: Tuck your seeds into the paper towel securely.
- Plate it: Place the towel on a paper plate with another plate on top.
- Leave in a warm place: Leave for at least a day and up to a week, checking periodically for any popping.
- Old seeds might have a chance here.
- Seeds may suffer from a lack of oxygen.
- Mold and mildew might show up.
- Seeds can become too nimble for a successful transplant.
Method 3: Directly in Soil
This sounds like a more natural method to use. because it is! No fooling around with pre-germination tricks, here:
- Use an 8-10 cm/ 3-4 inch pot: Take your pot and fill with seed and cutting soil. Press down.
- Make a hole: Use a narrow, pointy object to make a 3-5mm/ 0.20 inch hole in the middle.
- Put the seed inside: Place it gently in the hole.
- Use chlorine-free water: The soil should be moist but not overly saturated.
- Place in a proper location: Find a warm enough area for the seeds to rest.
- Find balanced temperature: Too cold and the seeds won’t budge, but too hot and they might dry out. If you’re in a cooler climate, use lighting for warmth. As recommended earlier, 71–77 ℉ /21-25 ℃ is ideal.
- Wait three days: It will take, on average, between 3 and 7 days for germination.
- Mimics a natural setting.
- Requires little equipment.
- Takes a bit of a green thumb.
Method 4: Stone Wool Blocks
These are the little blocks you’ve probably seen at your local garden shop; nicely organized and packaged for root cuttings and germinating seeds. They’re also perfectly suitable for weed seeds!
- Immerse the cubes: Cover them with water with a pH of 5.6–5.8.
- Gently squeeze: Do this to wring out any excess water.
- Place the seeds: Plant the seeds horizontally within the pre-formed hole.
- Cover the hole: Use an extra piece of the soft wool to do this. Make sure it’s not packed too tightly, in order for oxygen to reach the seed.
- Choose a warm location: Use the temperature range listed under the soil method above.
- Water the cubes: With the same pH as stated in step one, water every 1 to 2 days.
- Wait three days: It should take around 3 to 5 for germination to occur.
- Similar to a natural process.
- Easy-to-find supplies.
- Cubes may harbor moisture, leading to dead seeds.
Method 5: Using a Starter Kit
A starter kit is a convenient method that gives you everything you need for successful germination. With the Spongepot, you’ll receive a package of 20, 48 or 96 pots to get you started.
The instructions are, more or less, foolproof:
- Put supplied bacteria in water: Dissolve the bacteria in a liter of water.
- Water the Spongepots: Use the bacteria-water to water the provided Spongepots.
- Drain: Drain away any excess water that accumulates in the process.
- Plant seeds: Plant one seed per pot, about 3-5 mm/ 0.20 inch deep.
- Maintain temperature: Place the Spongepots in a place between 71 and 77 ℉ / 21-25 ℃
- Time to wait: Seeds should germinate between 3 and 7 days later.
- Transplant the seeds: Once the seeds finish, you can transplant them to their pot to begin their seedling phase.
- Easy to use.
- Includes a soil enhancer.
- Organic soil mixture with useful fungi.
- Promotes healthy roots.
- Only available through online order.
We at Marijuana Seed Breeders not only care about your seeds but the success of their germination. This gemination method is our favorite! It gives us the highest success rate.
You can see how to germinate with Spongepot in the video below or on the Spongepot product page.
How Long Does the Germination Process Take?
From start to finish, the germination process can take anywhere between 1 and 7 days.
Note that this is an average and the actual time frame depends on the individual seed quality and the growing conditions we discussed earlier.
For example, is the seed large or older? Maybe the temperature is a bit cooler? Seeds with these conditions may take up to more than a week to pop.
Seeds in the ideal temperature range should germinate within a week, maximum.
When Can I Pot My Seedlings?
We understand your predicament. You want to take the best care possible but, at the same time, you don’t want to become impatient and risk the entire process.
The good news is that it doesn’t take long! Once the seeds have popped and you see that root coming through, it’s time to pot your seedlings.
This, of course, will depend on the method you’ve used, but also the state of the seed from the beginning.
Generally speaking, you’ll be ready to do this anywhere between 3 and 10 days after the start of the germination process.
Once your newly-germinated seeds are ready to go in their special medium, you will continue looking over the seedling phase from there.
Depending on the size of your plant, you may need to switch to a larger pot at some point during the process. If this isn’t done, you could experience something called “root bound,” which means the rooting system has grown beyond the pot.
How to tell? Here are some signs:
- The new growth is fragile and weak-looking.
- There’s discoloration on the stem.
- May appear to be underwatered.
Another distinguishing trait to look out for that may indicate your plant is ready for a new pot includes how many leaves your plant has. On average, when plants have around four to five sets of leaves, it’s time for a transplant.
Common Germination Mistakes
When it comes to growing cannabis, there’s a slew of common mistakes that could stop you from achieving a successful grow. More specific to germination, pay attention to:
- Leaving seeds for too long.
- Incorrect planting methods.
Leaving Seeds for Too Long
Overestimating your seed’s germination needs could leave you with duds in the end. This is usually the case with pre-germination methods mentioned above, such as the cup or paper towel method.
Leaving your seeds for too long could result in overly sensitive roots that are easily damaged in the transplant process.
Avoid this mistake by transplanting your seeds when the root is approximately one to two centimeters in length.
This ensures the roots are stable but not overly saturated and prone to damage.
Incorrect Planting Methods
We see mistakes being made when it comes to the “two D’s” of direction and depth.
Placing the seed in its planting medium may seem like an overly simple task. However, there’s still a chance you could screw it up.
Avoid planting it in the wrong direction by paying attention to the seed’s crown.
This looks like a small crater shape located at one end of the seed. The other end has a point, so they’re easy to distinguish from one another.
Make sure that the seed’s crown is facing you when you plant it, which leaves the pointy end facing downward.
This way, when the seed germinates, it’ll sprout properly, sending the root down versus the opposite scenario of resulting in a failed seedling.
The planting depth matters, too. This will differ depending on the type of seed you’re planting and the medium it’s going in.
Generally speaking, we want to avoid planting seeds too deep, which could result in a seedling never showing up.
The opposite of this, planting too shallow, may also pose a problem. Doing so could result in weak plant stems that may not allow the seedling to grow.
Avoid either scenario by aiming for about 3-5 mm/ 0.1- 0.2inch in depth when you plant.
As you can see, germinating weed seeds is a basic procedure that if done with a little care and forethought, should be a successful one.
Have a designated location ready that’s warm but not too hot. If you live in a cool climate, use lights for warmth, and make sure your germinating seeds stay wet but not saturated.
It might be tempting to use a pre-germination method, such as the cup or paper towel, but we recommend avoiding these as much as possible.
Using a starter kit, instead, will enable you to have high-quality resources at your fingertips that cover you from A to Z
Pay attention to any root growth or “popping” to indicate germination is complete.
By following our guidelines, you’ll be transplanting your baby plants in no time.
I have a passion for nutrition, organic supplements, and (mental) health. After learning about the beneficial properties of marijuana, I dedicated myself to writing articles that will teach you everything there is to learn about this miraculous plant. I’m looking forward to sharing with people how they can incorporate the benefits of marijuana into their healthy lifestyle: you don’t have to smoke to consume marijuana.
Fail-Proof Cannabis Germination Method in Soil or Coco
We have a cannabis seedling germination page that includes everything you need to know about all the different germination methods, but this tutorial is different. In this tutorial, I’m going to share exactly how I do my seeds from beginning to end. Just follow these instructions and you’ll end up with healthy, fast-growing plants that germinate in just a few days. It’s basically fail-proof.
Turn your cannabis seeds…
This step-by-step tutorial will teach you how to germinate seeds and provide basic seedling care
Soon you’ll have healthy cannabis plants to admire
1.) Get Cannabis Seeds
There are a few different ways to get cannabis seeds, with the most common being ordering seeds online and growing seeds you find in weed that you buy. Learn how to research and find the right strain.
Here’s a picture showing several healthy and viable cannabis seeds
2.) Prepare Your Soil or Coco Containers
Before you start germinating your seeds, set up your soil or coco. It will still be a few days until your seedlings arrive, but you want to have everything ready before the seedlings need to be planted.
Get your containers ready before you start germinating
When it comes to new growers, it seems like the most fool-proof method (at least for me, and many of the new growers who write in) is the Paper Towel Method! It’s so simple, but there’s something about wet paper towels that a young seedling loves Learn About Other Ways to Germinate Seeds.
Paper Towel Method – Place your seeds inside a folded wet paper towel (Important: use cheap brand!)
This method is hard to mess up if you follow the instructions. Place your seeds inside a folded wet paper towel, and put that between two plates. The purpose of the plates is to prevent the seeds from drying out. Don’t let any part of a paper towel hang out the edges or it will wick away all the moisture and dry out. Keep everything totally contained between the plates.
Surprisingly, the really cheap paper towels work the best because the seeds and roots lay on top without getting stuck to anything. This is important. The more expensive “cloth-like” paper towels (like Viva brand) aren’t good for germination because the roots actually grow into them instead of laying on top.
Wet a paper towel (use the cheapest brand you can find). If growing multiple strains, you may want to label the paper towel so you know which is which. Place each seed on the wet paper towel next to their label.
Cover with another wet paper towel
Add another plate on top to keep the paper towels from drying out. Make sure now paper towel is sticking out the sides.
- Check on your seeds every 24 hours but try not to disturb them. When they’ve germinated, you’ll see the seeds have cracked and there are little white roots coming out.
- They should germinate in 1-4 days, though some seeds can take 7 days or longer (especially older and smaller seeds).
- Keep them warm if possible. Seeds germinate a little faster is to keep them in a warm place (75-80°F). Some people use a seedling heat mat but in most cases that’s unnecessary. I leave mine near a sunny window. I usually put a thermometer in the same place to make sure it’s not too hot or cold (or just check the plate with your hands)
Here are those seedlings about 2 days later. Be extra careful when removing the paper towels. Don’t let the seeds roll around or you won’t know which is which. This is when you’ll be glad you used cheap paper towels, as they are much easier to peel off without disturbing your seedlings.
You can see some of the seeds sprouted, but some of them haven’t yet. That’s totally normal! Each seed is different. If this happens to you, you have two choices. You could plant the ones that have already sprouted and let the other ones stay in the paper towels until they germinate. Or you could just put all the seeds in Rapid Rooters now, and hope for the best as far as the slow-sprouting ones. It’s up to you. Letting the unsprouted seeds stay in the paper towels longer improves the germination rate in my experience, but it’s simpler (easier) to move them all at once.
Seeds often germinate at different rates even if they get the exact same conditions
4.) Place Germinated Seed in a Rapid Rooter
Now it’s time to get your Rapid Rooters! Alternatively, you could place your sprouted seeds directly in the final growing medium (coco or soil). I think these help them get started, but I’ve grown many successful plants by just putting the germinated seed directly in its final home.
Rapid Rooters are nice, but not necessary
The Rapid Rooter should be cut open lengthwise. I use big scissors but you could also use a knife.
Gently place the germinated seed inside, root down. Place the seed close to the surface so it doesn’t have far to go.
If you have a root that is curved or bent, don’t try to straighten it out. Open the Rapid Rooter and lay the germinated seed down gently. It will naturally lay on its flattest side. When you slowly close the Rapid Rooter, the bent parts of the root will end up in the “crack” of the Rapid Rooter that you cut to split it open from the side.
Most seedling plugs will go back into place easily, and you’ll barely be able to tell it’s been opened. I love Rapid Rooters because their texture causes most seeds to stay in place and not “fall down” further into the hole once you’ve got the Rapid Rooter closed.
5.) Water the seedling in the Rapid Rooter until you see a root come out bottom, 1-2 days.
Make sure to always keep the Rapid Rooter moist but not soaking wet and give plain water.
Since your seed has already sprouted and been in placed into the right growing position, it’ll often pop its head out within just 12-24 hours! Sometimes you see just the leaves, but often you actually see the seedling push the shell above ground.
Don’t touch the shell if possible because a tiny tug in the wrong direction can pull the seedling out of the plug and break off the taproot.
Try to let the seedlings break free if possible. But if you have a seedling that’s stuck in a shell after a day or two, and doesn’t seem to be getting any better, you need to go in and help.
I’ve found that pointy tweezers are perfect to pry open a shell that’s stuck. Just close the tweezer, stick it inside between the shell halves, and let it slowly open to pull the shell apart without you ever touching the seedling.
Sometimes a “film” from inside the shell gets stuck on the leaves. If that happens, try putting a drop of water on the film a few times a day to soften it. If the seedling doesn’t push it off on its own, hold the stem between your fingers (so it doesn’t pull at the root) and use tweezers to gently tug at the membrane and release the leaves.
Don’t use a dome on seedlings unless it’s very dry where you live. If you do use a dome, consider keeping a vent open and watching the humidity. A young seedling doesn’t require as high humidity as clones (which are what the domes are designed for), and seedlings tend to get “wet feet” and stop growing as fast in constantly wet conditions.
Water your seeding in the Rapid Rooters until you see a root coming out the bottom. Keep Rapid Rooters moist but not wet. During this time, give seedlings bright filtered light. A CFL or LED light bulb kept several inches away works well. I’ve left mine on the kitchen table next to a sunny window, and that’s also worked fine for me as long as it doesn’t get too hot.
You should see a root come out the bottom in just a day or two!
After you see your first root, it’s time to…
6.) Put Seedling in its New Home
You are about to water your seedlings for the first time, so prepare your water now.
- Coco – Prepare water with seedling-strength nutrients, and make sure to pH your water to 5.5-6.5 right before giving it to plants. Unlike soil, coco does not naturally contain any nutrients so you must provide nutrients in the water from the first watering.
- Soil – Prepare plain water at 6-7 pH. You don’t need to add nutrients for the first 3 weeks or so because your plants will live off what’s in the soil. Adding extra nutrients at this point might overload and burn the seedlings.
Now that your water is ready, dig a hole that’s a little smaller than the Rapid Rooter, and place your seedling plug inside. The idea is to let the Rapid Rooter stick up above the soil a little to help the roots get more oxygen. It’s okay if the plug goes in flat with the soil, but don’t bury the stem as that can cause stem rot in some cases. Even if you’ve got a tall seedling, you usually won’t notice the extra length once the plant is bigger.
Gently pack the nearby soil/coco to hold the Rapid Rooter in place so the seedling is stable.
Your seedlings get a little extra oxygen if you let the Rapid Rooter stick up into the air slightly as opposed to burying it.
Example of cannabis seedlings growing in coco coir, about to get seedling-strength nutrient water. If they were in soil, I would give plain water for the first few weeks.
Water immediately in a small circle around your seedling. For most grow mediums and containers above 1 gallon, you can give 2 cups (500 ml) of water immediately without overloading your seedling. If the grow medium feels moist (for example coco that was recently re-hydrated), give 1 cup (250ml) of water this first watering.
Give 2 cups (500 ml) water in a circle around the seedling. If the grow medium is already wet, give just 1 cup (250 ml)
How to Water Seedlings in the Beginning
Two Main Goals
- Seedling roots never dry out (most important)
- Seedling roots aren’t staying soaking wet (roots need oxygen)
Seedlings “drown” and die due to lack of oxygen if they get too much water too often. To avoid this, try to provide an amount of water that lets you water seedlings every few days. Avoid giving so much water that the seedling roots are in a super wet grow medium for days as this causes “damping off” and root problems. Some grow styles like high-frequency fertigation call for watering more frequently. Just remember that the more often you water your plants, the less water you should give at a time. Also, keep in mind that a smaller container tends to dry out fast while a bigger container holds onto the water for longer
Try to maintain a schedule that lets you water your plants every few days without them looking droopy
- Water in a small circle around the base of the plant at first
- If the growing medium feels dry within 1 day, give more water next time. Otherwise, give the same amount again next time you water
- Repeat, until you can give enough water to get at least a little runoff, and have it dry in a few days
If the medium is drying in less than 2 days, it means you need to give more water to the plant at a time, or possibly transplant to a bigger container if the plant has outgrown its current one.
If your growing medium takes longer than 3 days for the top inch to dry, it means the soil is staying wet too long, and plant roots aren’t getting enough oxygen. It also puts your plants at risk of getting fungus gnats . Try giving less water at a time until the plant is drinking more. It’s possible you may have a problem with drainage in your medium ( what is good soil? ) or there are no drainage holes so extra water can’t come out the bottom of the container. Always remove any runoff water instead of letting the plant sit in it.
More seedling resources
Some growers like to put seedlings in solo cups and then into their final container. When done right this can increase the rate of growth by providing more oxygen to the plant’s roots. If you go that route, I recommend paper cups as they’re not as bad for the environment.
Autopsy: Why Aren’t My Marijuana Seeds Sprouting?
If your seeds still aren’t sprouting and growing properly, consider the following factors.
If there’s no germination at all…
- Temperature may be too hot or cold – aim for 75-80°F
- Too wet – seeds and seedling roots should always be moist, but should not be soaking wet
- Too dry – if a root dries out the seedling can die
- Bad seeds – It might not be you, it could be the seeds themselves. Even if you purchase from a good breeder, sometimes you still get duds. How can I tell if seeds are viable?
If seeds sprout, but then stop growing…
- Temperature is too hot or cold – aim for 75-80°F
- Too wet – new seedlings don’t like “wet feet” so make sure your Rapid Rooter or growing medium never looks shiny or muddy, as that means there’s too much water! For this reason, it’s also usually recommended to avoid using a humidity dome with seedlings unless your air is dry. Although clones love humidity domes (they need water from the air because they don’t have any roots to get water), seedlings like it a little drier or roots tend to get mushy.
- Too dry – less common unless you live in a very dry area, but sometimes your medium dries out too fast if you’ve got a heavy-drinking, fast-growing seedling!
- Too much light – if the seedlings get blasted with high levels of light right away, it can shock them. They may need some time to adjust to higher light levels. Simply starting your grow light a little further away than normal is usually enough. Think sunny window at first, and start ramping up after a week of healthy growth.
- Not enough light – if seedlings are growing long and stretchy without growing new sets of leaves, it means it wants more light.
- No light for more than a day – if the sprouted seed doesn’t get light within 24 hours after sprouting, it may die. Once seeds are sprouted, get them in a Rapid Rooter and under at least some amount of light as soon as possible!
- Roots damaged – If somehow your roots got damaged, it can sometimes stop the seedling from growing
Unfortunately, sometimes you will never know why certain seeds just don’t thrive. It’s all part of nature. But if you follow this tutorial you will get the best results possible.