When the leaves turn yellow in late flower

When the leaves turn yellow in late flower, are the plants even taking nutrients at that point? It seems like the buds begin to feed strictly off the leaves and there isn't much response from anything added to the soil (other than water)....and even the water uptake is slowed way down. I've also noticed that the pH of the runoff is more acidic than the incoming water and is much darker in color. That suggests, to me, that the root system is losing its ability to process nutrient uptake and beginning to break down and decompose. Basically, as the buds are ripening in late flower, they are only using what the plant has stored in the leaves and they aren't receiving any nutrients from the roots.

Is this correct?

That's the way I understand it, plants pull less and less out of the medium as you get to the end of flowering.

And I believe this is backed up by the study of Flushing. There wasn't much difference between plants given nutrients or no nutrients during the last couple weeks. Like the plant wasn't sucking it up.

If this is true, should we be feeding a little heavier during weeks 5 and 6 to head off potential yellowing?

Soil Growth said:

That's the way I understand it, plants pull less and less out of the medium as you get to the end of flowering.

And I believe this is backed up by the study of Flushing. There wasn't much difference between plants given nutrients or no nutrients during the last couple weeks. Like the plant wasn't sucking it up.

If this is true, should we be feeding a little heavier during weeks 5 and 6 to head off potential yellowing?

Click to expand...

Possibly. I fed the maximum dosage every time I watered so I'm sure there was plenty of nutrients....But, then, within a few days into week #8, the plants started turning that bright lemon yellow -all throughout the leaf....no spots or anything....just consistent, lemon yellow. And, then after that, they started to curl up and dry up and turn brown and crunchy and exfoliate themselves.

I also noticed that all those bright, yellow leaves was changing the color of the light inside the tent. It's definitely more yellow in there....all the reflective walls. Could this have some kind of effect on the ripening, I wonder? Yellow light doesn't get discussed much. I mean, the light fixture I am using, is set to mimic a CMH spectrum and it always looked like a more pink version of MH light to me. But with all the yellow in the tent, now, it looks like HPS light when I unzip the flap!