New leaves yellowing

elfo777

elfo777

Well-Known Member
Hello, I just changed from a 315W CMH to a 600W HPS for flowering about 4 days ago. Since then, all of my plants have been growing quite a bit faster, but some of them have these yellow new leaves and sprouts (bottom left and bottom right, pic 2). PH is about 5.8-6.8, light distance is about 45 cm or more, temps are not exceeding 29, but they go from 26 to around 29, watering adequately and using biobizz nutes at half strength.

Is this some kind of deficiency, light burn or is it just explosive new growth? It looks like the yellow leaves are slowly turning green but they are taking their time.
 

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Stagger'em

Stagger'em

Member
elfo777 said:
Hello, I just changed from a 315W CMH to a 600W HPS for flowering about 4 days ago. Since then, all of my plants have been growing quite a bit faster, but some of them have these yellow new leaves and sprouts (bottom left and bottom right, pic 2). PH is about 5.8-6.8, light distance is about 45 cm or more, temps are not exceeding 29, but they go from 26 to around 29, watering adequately and using biobizz nutes at half strength.

Is this some kind of deficiency, light burn or is it just explosive new growth? It looks like the yellow leaves are slowly turning green but they are taking their time.
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I just learned not to do this as well. Never. Never. Switch from one system to another, at least after flowering has been initiated.
It tricks her. And not in a good way.
Always keep in mind that you are recreating, nature.
And included genetics can be altered. Again, no good.
Stick to one system, all the way through.
 
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