• 1/3 Sphagnum peat moss or coco coir – 1/3 pumice, perlite, vermiculite or rice
  • hulls for aeration – 1/3 compost, earth worm castings or black leaf mold
  • To each 1 c.f. of this mix add the following:
  • 1/2 cup Alfalfa meal
  • 1/2 cup Kelp meal
  • 1/2 cup Insect Frass
  • 1 cup of Rock dust or Azomite
  • 1 cup of Basalt
  • 1 cup of Gypsum
  • 1 cup of Agricultural Lime – (not Dolomite)
  • 1/4 cup of Humic acid granules

Although not necessary, it does not hurt to blend these ingredients with water for 2-4 weeks to let the microbial activity break down the nutrients in the amendments.

After the plant is in the final container, add two tablespoons of bat guano just below the root zone and top-dress with worm castings or compost at 2″. You can just add water* to this mix and you should be growing some strong and healthy cannabis plants. If you want to take your marijuana growing to the next level, then you should take a look at the tea page and water your plants every week or so with an added boost of nutrients and microbes.

*Municipal water has chlorine and sometimes chloramine in it to prevent any and all bacteria from growing. This is not what you want when you are growing organically. You want as many beneficial bacteria as possible so that your soil thrives. Your options are;

Well water – Rain water – Reverse osmosis – Distilled water – Tap water

If you leave a bucket of tap water out in the open air, the chlorine will dissipate after several hours however if chloramine is present, it will not. What you can do is add ascorbic acid (vitamin C) at a rate of 3 grams/100 gallons and allow it to sit for several hours. Make sure you dissolve the tablet in the water. Also, you could add ¼ teaspoon of unsulphured molasses to 5 gallons of water and allow it to sit for a few hours.

Conversion Chart

1/2 cubic foot = 3.74 gallons = 14.3 litres