4th week flowering and this is happening

trambles

Well-Known Member
What's your water source and ppm/test with nutrients added? What fertilizer are u using and how much? What medium are u using? They look underfed. This is about the time that they start needing more food.
 

2TOK3R

Active Member
What's your water source and ppm/test with nutrients added? What fertilizer are u using and how much? What medium are u using? They look underfed. This is about the time that they start needing more food.
I just fed them 2 days ago and I don't do any testing I got no pH pen just soil tester and this the bloom feed I gave it half the dose thoughIMG_20211212_114720.jpg
 

Driver733

Well-Known Member
It looks like the leaves down low turned yellow first; likely a lack of nitrogen.

ETA: If you are only feeding bloom nutes in week 4, definitely a lack of nitrogen.

I use Fox Farm nutes (for now, that's another topic), if I follow their soil feed schedule and cut the grow big in week 5, I get nitrogen deficiency almost immediately. However, their hydro feed schedule has grow big feeding all the way to the end. I now feed at least a little grow big all the way to the end, much better results (but still not satisfied, trying GH Flora Nova next).
 

2TOK3R

Active Member
The leaves are clawing so I'm confused room temp is 28-30 humidity is 49 but I'm sure is also not testing my soil
 

Driver733

Well-Known Member
The leaves are clawing so I'm confused room temp is 28-30 humidity is 49 but I'm sure is also not testing my soil
It could be a ph issue locking out nutrients. Sometimes, I have issues that persist all the way thru. Of course, you know the yellow leaves will not turn green again, even if you correct the issue. Look for new yellow leaves from the bottom up.
 

Driver733

Well-Known Member
Yep. An underfed leaf can rebound. A burn leaf cannot. My starving clones usually go through a down swing before the roots start pulling nutrients, and I see the leaves darken back all of the time.
They will only green up if the leaf isn’t finished growing, once it’s mature that’s what your stuck with
I know in veg the leaf can green up again but I thought after 4 weeks into flower it would not. IDK.
 
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