How to Grow Marijuana – Lesson 4 – Soil Growing

Let’s Grow in Soil

This tutorial will continue from this point assuming you are growing in soil. If you are growing hydroponically, you may skip ahead to the hydro tutorials, or continue reading to learn as much as you can about how to grow marijuana with different methods.

By now, you have your tent set up, your seeds started, and your buckets in place. If not, go back to Lesson 2 – Setting Up Your Grow Space.

Now, you need to choose your soil. This part is important, especially if you want organic, or any other special option.

For excellent organic soil and perfectly sized buckets, see our list of What You Need To Grow Marijuana. You will find our recommendation for everything you will possibly need to grow, at great prices.

Planting Your Seeds

If you have not completed Lesson 3, go back and do so by clicking here.

If you have, and you are growing in soil, gather the seeds you started and your seed starters and soil together, and either lay down some old newspaper, painting drop cloth, or work outside.

Peat Pots

The organic peat pots we will be working with do not require transplanting after your seedlings are ready to be potted. You just plant the entire pot.

Now, fill one peat pot loosely with the organic premixed soil, and gently make a hole in the center with the eraser end of a pencil, about 1/4″-1/2″ deep. Drop one started seed (the hull has cracked after soaking and using the sandwich bag method, and the taproot, the part that will become the main stem of the plant, is showing) into the hole using sterilized dry tweezers, NOT YOUR FINGERS.

Do your best to have the taproot facing down into the soil, but don’t damage it.

Gently push the surrounding soil inward to cover it. Do not press it down.

Repeat this process until each of your seeds are planted.

More Waiting

Place your newly planted peat pots onto the plate that you had the sandwich bags on, and lightly water them with reverse osmosis filtered water (again, if you haven’t gotten an RO filter, see What You Need To Grow Marijuana).

The soil should be damp, not wet, and there should be little or no water collected on the plate. A spray bottle works well for this.

Keep the pots warm and moist (NOT WET) for the next week or so. Some strains will sprout faster, some slower. You can safely keep them near a window for light at this stage.

When they sprout, it’s time to decide which to keep, if you planted more than the legal limit. Plant genetics show quite early, so choose the ones that sprouted fastest, and have grown the most. It might be that one or more seeds didn’t sprout at all, which is why you planted more than the legal amount.

Destroy the ones you don’t choose to keep, or give them to a friend.

Setting the Light

At this stage, you do not want the delicate seedlings to get the full power of the grow light that you have installed. If you are following our recommendation for the LED grow light located on our What You Need To Grow Marijuana page, then you will want the light to be at the position the furthest away from the buckets.

Read the instructions for the timer you chose (the one we recommend is quite simple), and set a daily schedule for what works best for you. You will want the light to be on for 18 hours, and off for 6 hours, so schedule the “off” time for when you are definitely sleeping. Make sure the on/off times are the exact same every day.

If you have one specific hour every day that you can do your gardening, give yourself a 4-hour window. Account for daylight savings, possible interference, etc.



More on this in another article, but just don’t do it. It causes stress for the plants, and that is bad for your end result.

Plants are ready to be planted and watered, light is set. Time to move on to Lesson 5 – Nutrients in Soil.