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RooRman
Well-Known Member
Thank's for your reply RooRman,
What amount of amendments do you add per bale of promix?
You can play with the amounts, which is the nice thing about making your own mix. This should get you started:
10-20% Perlite: for added drainage and soil aeration. Use closer to 20% for flowering mixes.
10-30% Worm Castings: for nitrogen, added micronutrients and aeration.
1-2% Dolomite lime: Pro-Mix BX Seed and Clone has this already added! So I don't add it. Basic Pro-Mix, to my knowledge, does not. Dolomite lime helps stabilize the pH of the soil. Pro-Mix is mainly peat and as the peat breaks down the soil gets more acidic. Dolomite lime is used to combat this natural lowering of the pH.
2-4% Kelp meal/Guano: For additional macro/micornutrients.
I have also worked with Rainbow mix as another added dry fertilizer. This contains mychorrizae which is a beneficial root fungus. Although it is best to age soil before use when using this as it allows the fungus to colonize the soil beforehand.