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Grow weed starting from seed 🌱

May 27, 2018

“Don't judge each day by the harvest you reap but by the seeds that you plant.”

Starting from seed is a remarkable journey.  Understanding the biology is one thing, but comprehending how a little miracle bean can turn into a gigantic tree that can affect your body and mind is nothing short of an evolutionary miracle. Or rather a co-evolutionary story of plant and human.

Our favorite thing about starting from a seed, rather than a clone, is that you get to see the full life cycle and enjoy a plant that is unique, just like you.  An entirely new genetic makeup will enter the world for the first time, and if you're lucky, something remarkable might be born.

Raising a seedling, however, requires some patience, gentle hands, and a smidgen of luck.  Thankfully pot seeds are remarkably vigorous because they are what's called endosperm seeds, which means they have almost pre-formed cotyledon leaves before you even add water.  Below is a brief guide on the techniques we have found yield the most success when starting seeds and raising your seedling to a healthy plant ready for transplanting.

Related: Why Grow One Plant?

1) Soaking your seed

soaking cannabis seeds

To accelerate germination, you are going to want to soak your seed in a small container with lukewarm water and place it in a dark and warm place for 12-24 hours, but no longer.  By drenching the seed, it absorbs the water thoroughly, activating the germination process.  Doing this also helps to loosen the shell as it becomes a little softer making it easier for the embryo to crack it open.  When your seed sinks to the bottom it is ready to be planted, and sometimes the seed will pop out a small taproot.  A seed can still be planted though if it does not sink.

2) Planting your seed

We like to use seedling pellets that are made of a mix of compressed peat moss and coco husk.  To expand, soak it in water for 10 minutes.  Once your seedling pellet has absorbed enough water and has expanded to its maximum size, drain off any excess water.  The growing medium should be like a damp sponge that would not leave streaks on the table.  Dig a small hole about 1/4 in deep for your seed. Use a spoon to lift the seed out of its bath.  If it has popped out a taproot be careful not to damage it.  Gently place the seed into the hole and lightly cover it with dirt from the pellet.  Now that you have started the germination process, your seedling will come above ground within two weeks.  The older the seed, the longer it takes for it to germinate.

3) Above the ground

Perhaps the most exciting stage, your baby will typically come above ground in 1-2 weeks.  As your seedling comes above the soil, its shell might take a few days to fall off.  It’s best to leave it alone, nature has the job covered.  If it does not come above ground after about two weeks, the chance of success is dramatically reduced, and it’s best to try again.  Even the best seeds have an 85% germination rate.  When your seedling comes above ground, it is going to want to see a direct light source.

4) Lighting for your seedling

Seedlings require a medium amount of light in which it has enough to grow but not too much light that it gets burned.  Leaving your seedling in direct sunlight will cause the leaves to curl, while too little light will cause the seedling to stretch.  If growing outside, seedlings want to see a direct light source to stop them stretching.  If inside, a sunny windowsill with more than half a day of sunlight works wonders.  Otherwise, 18 in away from a growing light works excellently.  Your seedling should not stretch more than 6 in at most.  We'll cover lighting in more depth in a later blog.

Related: The Cheapest Way to Grow Pot Indoors

5) Watering Seedlings

watering cannabis seedlings

For young plants, it’s best to use bottled water as it has no chlorine added.  If using tap water, let it sit for 24 hours before watering to dissipate any chlorine.  Chlorine can also be eliminated by boiling for 20 minutes.  Under normal conditions, after soaking your seedling pellet, it should contain all the moisture your plant needs before it comes above ground.  As it grows, it will only need about a shot glass worth of water at most per week to keep the medium damp.  Seedlings don’t drink a lot of water, which makes sense given their size.  Your plant will do better in a growing medium which is damp.  Overwatering is just as deadly as drying out.

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**Pro Tip**

Dampening off happens when the seedling is in too moist of an environment.  The stem starts to rot at the bottom.  When this happens, the plant will bend over and die if not treated.  To help fight the infection, lightly spray a 0.5% solution of hydrogen peroxide around the affected area.

6) Leaves & Hardening Off

The first set of leaves to come above ground are called the cotyledons.  These little leaves are packed with energy and will grow to about 1/4 in in size before eventually falling off.  Your second leaves to emerge will be single blades and look like regular pot leaves. 

They will become several inches in length.  During their growth your first actual set of leaves will appear.  These are typically three blades. Around this time is when your plant is “hardening off”.  You will notice that the stem will start to develop a thicker skin and harden off.  As the leaves of the plant get bigger, they can gradually handle more sunlight, so move it into more direct light.

7) Transplanting

When the plant has hardened off, roots will start emerging from the bottom of your seedling pellet and the plant is ready to be transplanted into a bigger pot.  Be very careful not to damage the roots during this stage.  Any stress will slow its growth. 

Dig a small hole in your bigger pot for the seedling, and place the mykos rooting pack in the bottom of the hole.  Then carefully dislodge your seedling along with its seedling pellet.  The best way is to invert the germination cup and tap on the bottom, being careful to hold any soil from falling out with your hand. 

Now bury it on top of the rooting pack so the base of its stalk is level with the top soil.  Give it a proper watering to set the roots in the ground, then skip your next watering so the roots can take hold.

We hope this guide helps you find fun and success with your plant.  If you have any questions, please comment below. Check out our kits here if you're ready to get started.

Related: Harvesting and Drying


Knowing how to grow a small weed plant is likely the hardest part of actually growing it. Now that you know what to do, you are well on your way to enjoying hassle-free, home-grown marijuana. 

Ready to start growing, see what a Pot for Pot has to offer! 

FAQ about Starting from Seed

What are some of the best practices for planting marijuana seeds?

Cultivating marijuana plants from a seed rather than a clone can be quite exhausting since it requires a lot of care for the plants to germinate. There are some good practices that you should undertake before planting a seed to ensure maximum germination. First, you should start by soaking your seeds in container containing lukewarm water in a dark environment for 12-24 hours. Soaking the seeds accelerates germination by softening the outer shell. During planting, use seedling pallets soaked in water for 10 minutes. Place the seeds in a small hole ¼ in deep and then gently cover with dirt from the pallet.

How do I provide adequate lighting for my seedlings?

Marijuana seedlings are very sensitive to light, and therefore you should ensure that you provide just the right amount of light. If grown outside, seedlings should be provided with direct sunlight. If inside, provide them with half a day of sunlight through a sunny window sill.

When is the ideal time for transplanting seedlings?

The seedlings are ready to be transplanted when the plant has hardened off and the roots start emanating from the bottom of the seedling pallet. This is the perfect time for transplanting, but you should be extremely cautious not to damage the root.

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