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Yellow spots week 1. Need help identifying.
- Thread starter Wajikul
- Start date
goingrey
Well-known member
Hmm no I don't think so. The feed sounds quite reasonable. Heat stress more likely, 30c is not super hot but it's a small plant... Or then septoria (a kind of fungus).
MedBelgUsr
Active member
it could also be due to roots not having enough space anymore ... is it the only plant under the same regimen and having issues ?
This is my story with roots : I had all the nutrients & soil perfectly tuned, and still I was having yellow leaves starting from the bottom.
What did I do to fix it ( thanks Dubi from Ace Seeds ) : now I check the roots size after 4 weeks and when they reach the bottom of my pot, I transplant them and then switch to flo one week later.
Not a single issue anymore with leaves after that.
But imho the day temperature is way too high for the flowering phase : if you cant lower the temps, I believe some terpenes might be lost due to heat.
Good luck
MBU
This is my story with roots : I had all the nutrients & soil perfectly tuned, and still I was having yellow leaves starting from the bottom.
What did I do to fix it ( thanks Dubi from Ace Seeds ) : now I check the roots size after 4 weeks and when they reach the bottom of my pot, I transplant them and then switch to flo one week later.
Not a single issue anymore with leaves after that.
But imho the day temperature is way too high for the flowering phase : if you cant lower the temps, I believe some terpenes might be lost due to heat.
Good luck
MBU
44:86N
Active member
Maybe the beginning of a deficiency, but since you fed, it looks corrected. If the spots start spread on the leaves they are already on, or start to appear on the newer growth, then something is up.
But they look good, other than some spotting on older leaves. Keep up with your feeding schedule, and check your H2O pH, both before adding nutrients and after -- shooting for 6.4 - 6.5 on a peat based mix.
But they look good, other than some spotting on older leaves. Keep up with your feeding schedule, and check your H2O pH, both before adding nutrients and after -- shooting for 6.4 - 6.5 on a peat based mix.
I'm not really sure what's going on there, the temps are a bit on the warm side but not so much it should be causing that to happen. Is it possible in a feeding some of the nutrients splashed on the leaves? Water droplets on leaves under an intense light can cause spots like that. I have a chart I use to help me identify issues which I'll attach to this post, going by that it could be a micronutrient issue any one of these can cause yellowing on young leaves copper, boron, sulfur, zinc or manganese. The one it matches most closely in my opinion is manganese and that can happen either from an actual deficiency or from a lock out due to a ph issue. Manganese gets locked out when the ph runs high above 6.5. I agree with 44:86N that it looks like it was a temp problem that has since cleared up. I'll also attach a graph that shows the relationship between ph and nutrients in soil grows.
