- Thread starter
- #81
Emeraldo
Well-Known Member
I started a thread on this leaf damage issue and have learned something new. Apparently, adding kelp meal to your soil can have the effect of dramatically raising soil pH. I added a lot of kelp meal in amending my soil this year, probably more than I should have.
Were you aware of that? I mentioned that because kelp meal is a great source of K, and for that reason I knew there was sufficient potassium in my soil. Nonetheless, if it drives up the soil pH dramatically, it can result in a K-lockout that looks exactly like a potassium deficiency. Because it is.
Oyster shell is also said to raise soil pH, and I in fact amended my soil this year with that too. Also without knowing what the consequences could be.
Add extreme heat, and the plants' water draw increases, amplifying soil issues.
Live and learn! One of these days I'll be good enough to be dick of the month!
Potassium deficiency? Or heat stress? Or soil pH too high?
A month ago, we had high temps (104F/40C) and, at the same time, high winds that whipped the 5 foot tall plants, snapping them this way then that. At the time I noticed injury to the leaves, the serrations turning upward in a kind of little cup. At first, I though all these symptoms were just...
www.420magazine.com
Were you aware of that? I mentioned that because kelp meal is a great source of K, and for that reason I knew there was sufficient potassium in my soil. Nonetheless, if it drives up the soil pH dramatically, it can result in a K-lockout that looks exactly like a potassium deficiency. Because it is.
Oyster shell is also said to raise soil pH, and I in fact amended my soil this year with that too. Also without knowing what the consequences could be.
Add extreme heat, and the plants' water draw increases, amplifying soil issues.
Live and learn! One of these days I'll be good enough to be dick of the month!