I'm thinking that your pH-ing didn't 'take' and that you have a serious pH problem. I've seen that before. What is the sand? Does it have limestone in it? Did it have a reddish tint indicating high iron? Minerals in your soil are BAD because they make it really tough to feed properly or keep the pH stable. You need to use totally chemically inert agents like perlite to make the soil more friable wihtout adding minerals by mistake. I'd take that sucker right out of its current pot and shake off the rootball just a bit, and repot it into KNOWN good soil, and then give it a nice drench with water at pH 6.8.
stinkyattic Reviewed by stinkyattic on . Nothing I Have Seen Before I have some dark spots on quite a few of my plants leaves, I have never seen this before. Can anyone enlighten me? I am guessing it would be some sort of nute problem, except I don't think any of my plants are suffering from anything other than this (check out my grow log thru my sig, i just posted new pics of my vegging plants). So anyways, here are some pics. Rating: 5