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When I had to leech my soil I used three times the volume of the pot. My pots are 3 gal. so I used about 9 gal. I recently read that when you do this you shouldn't use plain water. Instead you should add a "weak form of the nutrients you plan on using". This makes sense to me because you don't...

Soil: MG organic. My first post here was when they were seedlings. It was suggested that MG was burning the seedlings, but it turned out to be a nutrient def. Lights: 4x4' fluorescents at 5k lumens each I am growing C99 Problem: Mid and upper leaves have purple edges.(Molybdenum def.?) A few...

It turned out to be a nutrient deficieny. I could not get new soil( no car) so I leeched the soil in two of the pots. This made the problem even worse and the plants in these pots never recovered. I added nutrients and the surviving plants began growing again.

Ok, thanks for the help. I'll get them in new soil ASAP

Hi, I have 7 c99 plants that breached the soil almost two weeks ago. A couple are doing ok but many have purple and discolored leaves(light green with purple/grey mixed in). The stems are also purple. All of them are growing very slowly. I'm not sure what is causing this. Lighting: 4x4' T5...