How To Germinate Weed Seeds In A Bag

Do you want to learn how to start cannabis seeds? Follow this quick tutorial and video guide to learn how to start cannabis seeds right at home here! How to Grow Seeds in a Plastic Bag. Small seedlings can prove challenging to sprout in the garden bed, since watering or rain may wash them away before they germinate. Growing the seeds in advance inside a plastic bag prevents this issue and helps speed germination. Plastic bag sprouting also allows you to test … I am experimenting germinating I have two seeds AK48 and Afghan Silver. I have put the AK48 in damp tissue and a sealed bag while I have put the Afghan…

How to Start Cannabis Seeds

When it comes to starting cannabis seeds, there’s a little bit more care that goes into that simply plopping the seeds into some soil. After all, you want them all to germinate right? Plus, by following the steps below to start your cannabis seeds, you may learn a thing or two before the seeds even germinate!

Video on How to Start Cannabis Seeds

Germinating Cannabis Seeds

  1. Alright to start, go ahead and pull out whatever cannabis seeds you intend to germinate. Today, we will be starting four different varieties to find the perfect strains to run for the light depping and full sun seasons.
  2. Now with your seeds picked out, go ahead and fill a few jars with water and label them accordingly. Once the jars are filled, just drop your seeds into the water to soak. You will want to let them soak for anywhere between 4 to 12 hours. Grower Tip: If your seeds are floating in the jar by the end, they most likely will have trouble germinating.
  3. Now that the seeds are done soaking, go ahead and get some wet paper towels and ziplock bags. Yup, back to the same seed germination steps you likely learned in grade school.
  4. With the paper towels moist, but not overly wet, set your seeds on it and fold over. After this, simply place the paper towels into your ziplock bag. Don’t forget to label each bag, so you don’t confuse the strains later on.
  5. Place these bags in a safe place that’s relatively warm. We will check back on them soon.

Preparing Your Soil

And, we’re back just two short days later with sprouted seeds! Once you see them sprout just a tiny bit, they are ready to be moved into some soil.

With the seed sprouted and still wrapped up in their moist paper towel, go ahead and grab some pots and fill them with soil. We use smaller pots at the beginning and then transplant them into larger pots later on, but feel free to move the sprouted seeds into any size pot you’d like. You can even place them in the pots you intend to use for the duration of their lifespan.

Now that the pots are filled with your soil, get ready to moisten that soil! But first, be sure to add some Rootwise Mycrobe Complete to your water. For this, you will want to use a pinch of the Rootwise product per plant. We had nine sprouted seeds to move into pots, so we used about half a tablespoon, but you could definitely go even less than that.

Of course, you could forgo using the Rootwise Mycrobe Complete all together, but we tend to get much better results when it’s used.

Placing Your Cannabis Seeds in Soil

Alright, you have your water all mixed up, go ahead and pour it into the pots. Be sure to get each pot very moist prior to planting your sprouted cannabis seed in the soil. Once moistened, simply stick your finger in to form about a ⅛ inch deep hole. This is where you will place the seed.

See also  How To Germinate Weed Seeds Without Paper Towels

For this next part, there is actually some quite heavy debate. Feel free to do your research and do whatever works best for you.

Personally, we prefer to take the sprouted seed and look for the “hook” growing out of the seed. After locating it, place the part protruding from the seed down into the soil, the other side of the “hook” facing upwards, and cover the remainder of the seed with soil except for the very tippy-top of the seed itself.

Again, this is a personal preference, but we like to leave the very tip of the seed exposed at the top to ensure the plant knows which way to go. We know, we know, plants are beyond smart beings, we do this just to be cautious and ensure each one has the best chance of survival.

Letting Them Grow

Now with your newly sprouted seeds in the soil, put them under lights or place in a window sill to allow them to continue to grow. A controlled environment is best, as you can ensure the plant gets enough sun, as well as remains at the perfect humidity and moisture for optimal growth. However, we totally understand if that’s not an option. A window sill or even outdoors will work just fine.

Just beware of the conditions you are placing your newly sprouted seed in. After all, it’s just like a newly born child, small, fragile and trying to figure out the world around them, so care for them the same. They are your plant children and deserve some tender, love, and care, so they can provide you with a strong plant that produces in abundance for you.

With the plants in their new home, we get to wait again! It’s okay though, everything takes time to grow, just like us, so be patient and let the seeds keep working hard to come to life for you.

And, we’re back just a few short days later! The seeds have officially sprouted their first leaves. Now, care for them using this calendar and feeding schedule until they begin showing their sex. At that time, you will want to separate the female and male cannabis plants, so you can place the female plants into flower.

How to Grow Seeds in a Plastic Bag

Small seedlings can prove challenging to sprout in the garden bed, since watering or rain may wash them away before they germinate. Growing the seeds in advance inside a plastic bag prevents this issue and helps speed germination. Plastic bag sprouting also allows you to test germination rates, which is vital if you are using saved garden seed or old seed from previous years. Germination time varies depending on the plant variety, but most sprout within three to 14 days.

Stack two paper towels on top of each other. Fold the towels in half and sprinkle them with water until they are completely moistened but not dripping wet.

Spread the seeds out on top the paper towel, covering only half the towel with seeds. Space the seeds so they are not touching and there is about 1/4-inch of space around each seed.

Fold the damp towel in half, sandwiching the seeds between the towels. Press lightly on top the towel so the seeds are in full contact with the towels on both sides.

Slide the paper towel into a plastic zip-top bag. Seal the bag closed to trap the moisture and prevent the towel from drying out.

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Set the sealed bag in a warm area, such as on top the refrigerator, where temperatures are between 70 and 80 degrees.

Check the seeds every two days until the seeds begin to swell and the first short sprouts emerge. Sow the seeds immediately in a pot or prepared garden bed at the depth and spacing recommended on the seed package once they begin to sprout.

Things You Will Need

Plastic zip-top bag

Tweezers make it simpler to transplant sprouted seeds without damaging the tender sprout.

Germinating seeds>sealed bag and tissue and plate

I am experimenting germinating I have two seeds AK48 and Afghan Silver. I have put the AK48 in damp tissue and a sealed bag while I have put the Afghan Silver seed in damp tissue on a plate I have placed them both in a warm area to see which takes off first.
I will keep you all updated and let you know which seed roots first and I will post pictures once they start Thankyou

Well-Known Member
Well-Known Member

I usually just soak some paper towels with a 1/4 tsp or so of SuperThrive. Fold it up put in a zip lock bag fold it up. And put it under a flap of the mylar about some cfl I use in a clone box. 24hrs nice roots easily. The SuperThrive old timers advise to help producing females. Could just be a wise tale.

Well-Known Member

The AK48 rooted first which i put in wet towel and put in a sealed bag had a look at it this morning and it had rooted so i have put it straight in to a sponge until it starts, I will keep you updated about the Afghan Kush I have put that in a sealed bag because I have seen how quick it roots Thank you

Well-Known Member

“wives tale” as in “old wives tale”

Not to be a dick or anything, I just would rather someone corrected me if I misspoke than let me keep saying something incorrectly.

Anyway, I have always used a damp paper towel in a plastic bag, not sealed, so as to allow some air circulation. Nowadays, I am more inclined to just drop it in some moist soil out of direct light. Or a starter plug. Actually, I will probably end up using the paper towel thing again. Always reverting to what I know works.

Uncle Ben
Well-Known Member

“wives tale” as in “old wives tale”

Not to be a dick or anything, I just would rather someone corrected me if I misspoke than let me keep saying something incorrectly.

OK, I’ll bite and make the correction as I have for many years. Using any (non-conventional) method other than sowing directly in soil is, well, quite ignorant of plant processes.

Sheesh. only in cannabis forums. If it’s popular it’s usually wrong.

Light is OK, and direct sun all day is best once the seedling starts pushing.

Here’s my archive:

Germinating Cannabis Seeds (for Bio Growers)

Your seedlings will be alot better off if you germinate directly in soil – less handling and mechanical disturbance means less chance of physical damage to the plant’s taproot (and roothairs) and less food reserves used to position itself due to the natural hormonal influence called Gravitropism. That translates into less food reserves used and increased seedling vigor, especially in the very early critical stages of seedling development.

This is my foolproof method for Cannabis Seed Germination in soil:

First, if harvesting seeds from my own crosses, I air-dry newly harvested seeds for a couple of weeks, and then store them in the refrigerator with a little rice. Cold-treatment seems to increase viability and germination rates, especially with indica-dom strains. I almost always get a 100% germination rate with quality seedstock.

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Soak the seeds in plain water for 12 hours prior to planting to hydrate them, which will speed up germination. In general, good seeds will sink, bad seeds will remain floating (they contain air, not an embryo). I first sterilize seeds in a bleach solution (1 Tbsp. bleach/1 gallon of water) for 1/2 hour to kill any fungus residing on the seedcoat.

Sterilize enough *damp* fine soil with heat to germinate all of your seeds. You can do this by treating the damp soil to temps of (no more than) 200F for 20 mins in a conventional oven, or in a microwave oven on high for 2 minutes, while stirring a couple of times. Your goal is to get and hold the entire soil mix’s temperature at 170F to 180F for about 20 minutes which can be monitored with a probe type thermometer. Let the mix cool thoroughly. This will insure that damp-off fungus spores have been killed in the soil mix. Make sure the soil mix is light and humusy (not real coarse). You can add a little sand or vermiculite to aid in drainage and weight.

Buy some white 20oz styrofoam “drinking glasses”, commonly called “Styro-Cups”, and punch holes in the bottom (and side bottom) for drainage. I use a red-hot ice pick for this. These containers are 6 1/2″ tall and will allow ample room for the taproot to grow before cotyledon emergence which will increase your seedling’s vigor. The taproot (radicle) is already at least 4″ long at the point of emergence – don’t restrict it (in order to maximize seedling growth rate). Styro-Cups can be found on the shelf displaying picnic items at your local grocery store.

Fill the pots almost to the top with your soil mix, water well to settle the mix, take a pencil and make a small hole about 1/4″ to 1/2″ deep, NO deeper, and drop *one* seed in. Cover the seed with *fine* soil, only enough to top up the hole, firm lightly with your finger, and lightly water until water runs freely thru the drain holes. Place in a warm spot around 80F/26C. Do NOT cover the cup with saran wrap or anything else. The seed has been hydrated from the soaking and will germinate soon. This container should not require further watering until the seedling is up and running.

During the first couple of days, mist the top soil surface lightly (if need be), never allowing the top to crust over, but not to the point that the medium stays waterlogged which will invite pythium rot (damp-off). “Less is more” at this point. Do NOT water this pot any more until the seedling is up, and only if it needs it at the point of emergence. Again, no need to cover with plastic wrap as the radicle (taproot) will grow at least 4″ before the cotyledons emerge from the soil. IOW, even though you can’t see it, the plant’s root is seeking and finding moisture at the container’s lower soil levels. I cannot emphasize this enough. The seedling will emerge anywhere from 2 to 10 days from the time you sowed it.

That’s all to it! With good care, your faves will be ready to transplant within 1 to 2 weeks, and will easily slip out of the “cup” with a solid rootball that will never know it’s been disturbed if potted up gently and quickly. Move up to a final pot of 3 to 5 gallons to sex and finish.