Chapter 12

Get Your Soil

Potting soil is one of the few recurring purchases you’ll make as a home grower. Soil is extremely valuable to you and your cannabis plants and ought not be underestimated. Ask any farmer who makes wine and grows grapes about the importance of soil quality.

There are many well known “cannabis friendly soils” to choose from, but if you order online, you’ll pay a hefty amount just for shipping. Try to locate your soil from your local garden shop, hydroponics store, grow store, or even hardware store. If you are fortunate enough to get soil like Happy Frog or Ocean Forest from Fox Farms, then you must not add any additional fertilizer for at least 4 weeks. These soils have plenty of nutrients already. However, if the soil is being reused for a second or third cycle, you don’t need to withhold fertilizations.

Cannabis friendly potting soils have all kinds of neat ingredients like peat moss, forest humus, gypsum, perlite, vermiculite, dolomite, coco fiber, worm castings, bat guano, alfalfa meal, crab meal, fishbone meal, kelp meal, oyster shell, humic acid, mycorrhizal fungi and other soil microbes and beneficial soil bacteria. The ingredient list on any soil package always lists ingredients according to which is used most, down to what is used the least. Minerals often found in the soil include calcium, nitrogen, manganese, sulphur, phosphorus and potassium.


Cannabis potting soil options…

Depending on where you live and what is available, here are a few recommended cannabis friendly potting soils. I personally use Fox Farms Ocean Forest and Happy Frog to sprout seeds or plant clones without any problems. If you’re cost-conscious, usually the Happy Frog bags will cost the same as Ocean Forest, but Happy Frog contains more soil. Happy Frog bags often come in 2 cu. ft. bags, whereas Ocean Forest comes in 1.5 cu. ft. bags. Fox Farms also offers a seed starter potting soil. Their Light Warrior is specifically for sprouting seeds. I don’t bother with it. Just another “gardeners choice” matter!4 


4 Cannabis Potting Soil Brands: Big Roots, Fox Farms, Roots Organics and ProMix

Big Roots (not for planting seeds)
Baby Big Roots (for planting seeds)

Fox Farms Light Warrior (for planting seeds)
Fox Farms Ocean Forest 1.5 cu ft
Fox Farms Ocean Forest 12 quart (much smaller than 1.5 cu ft)
Fox Farms Happy Frog 2 cu ft 
Fox Farms Happy Frog 12 quart (much smaller than 2 cu ft)

Roots Organics Original 1.5 cu ft

ProMix 2.8 cu ft

I do not recommend using Miracle Grow time release potting soil, as it releases N (nitrogen) for too long. You don’t want lots of N in the FLOWER phase.

If you can’t find any of the above potting soils locally, you could order them online using the links found here. Or you can ask your local stores for their recommended organic-based potting soil for fruits, flowers, and vegetables. In this case, yes, you’ll definitely want to add perlite to your potting soil. You can always add perlite to any of the above soils too. Perlite helps to keep your soil well aerated. A small 2 quart bag of perlite would be a smart addition to any bag of soil. If you have the space for it, upgrade and save a significant amount of money with a 120 quart bag of perlite.

Lastly, do not confuse coco coir with soil as they are different mediums. If the bag says “coco coir” on it, that’s not what you want, you want soil if you want to follow my system. If you see Roots Organics Coco Soilless mix, or Mother Earth Coco Perlite Mix for example, these are not potting soils, rather they are coco coir mediums. With coco, you have to water every day, sometimes a few times a day just to keep the medium wet at all times. Using coco is technically a hydroponic / soilless style of growing. To me, it is more labor intensive, but many home growers come to prefer the coco style of growing. I’m honestly not sure why. If you want to drive terpene production in your home grown cannabis, studies have shown soil grown cannabis is more likely to have higher terpenes percentages. Coco is just one more option out there in the wild world of cannabis cultivation!




Marc Eden’s DIY Cannabis Cultivation Book For Beginners: Learn How To Grow Cannabis Indoors Using LED, Tents, and Soil
Published by Green Carpet Growing, Inc. San Diego CA 92103
© 2021 Green Carpet Growing, Inc
All rights reserved.

No portion of this book may be reproduced in any form without permission from the publisher, except as permitted by U.S. copyright law.

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