This is the second year that I've grown C99 outside, and the second year that I have had problems. Pretty sure it's an iron deficiency. Last year I treated the immediate symptoms with a foliar application of chelated iron. Since I've read that iron shortages usually show up when the pH is too high, I top-dressed with earthworm castings to buffer the pH and the problem eventually disappeared. I water with city water, and it tests in the 8-9 pH range. Here's a pic of what it looks like, new growth is pale between the veins:
This issue as only shows up on this strain so far. I've grown other more indica-leaning plants here with no problem. I've also grown vegetables here and they've matured normally. In between seasons I cover crop the beds and amend with compost I make from yard waste and kitchen scraps. The bed awas originally filled with a mix of bagged soils.
Has anybody else noticed that c99 is especially sensitive to ph problems? Any ideas of a way to fix this, so I'm not chasing it with spraying foliars every couple of days? Even though I can get ahead of it I feel like I am probably setting the plant back since it's hungry for iron.
This issue as only shows up on this strain so far. I've grown other more indica-leaning plants here with no problem. I've also grown vegetables here and they've matured normally. In between seasons I cover crop the beds and amend with compost I make from yard waste and kitchen scraps. The bed awas originally filled with a mix of bagged soils.
Has anybody else noticed that c99 is especially sensitive to ph problems? Any ideas of a way to fix this, so I'm not chasing it with spraying foliars every couple of days? Even though I can get ahead of it I feel like I am probably setting the plant back since it's hungry for iron.
