Can it be magnesium def? Or could it be heat, or maybe something with the soil pH?
I can´t understand it, if it´s heatstress. I have my temp at an average of 24 deg C (-4,4 deg F), so i can´t see how that works. Occasially the temp highers, but never over 32 deg C (0 deg F), and never under 19 deg C (-7 deg F).
Or on the other hand, maybe it could be from the light? But i have good vent in my tent. The 400w Cooltube, is approx 18-20 " away from the canopy right now. I think it´s a little too far away, and they aren´t getting the light the should and could.
After i saw this on the plants leaves, i raised the light from 14-18 ", to 18-20 ", thinking it was the light. But it didn´t get better. I can easily hold the back of my hand under the light at 8-10 inches away.
I can´t figure it out. The deficiancy shows mostly in the middle of the plant, but the fans on the upper half is also effected. This is a sign that i deal with a N, P or K deficiancy, right? The bigger fanleaves died and dried out in a matter of 2-3 days, without any yellowing. But the "woulds" on the smaller leaves has been there for a week or more.
I´ve had this before, as i wrote yesterday. So it has to be a fairly common deficiancy, right? So someone should have come across it at some point? I have changed the soil since then also. I have searched Google, and here at AF, but i couldn´t find anything like it.
If you have seen this before, and found out what it was and solved it. Please write a sentence or two, and i´ll do the research myself.
Have a good day. /h.
