A very odd predicament.

I have an odd situation over here. I am fairly familiar with growing vegetables, and have seen most nutrient deficiencies, but could be mistaken. I have an aeroponics system operating at 6.0-6.1 pH and 1300 ppm. It stays between 75 and 80 in the room. Not only do I have an air conditioning inlet into the room, but two fans to keep the airflow kosher. I have recently started to foliar feed with aerated worm compost tea at 400 ppm. After the first feed, I noticed that the new leaves were yellow and then turned to green. I fed them again, thinking that it was a nutrient deficency, but it just made it worse. They are growing super fast, perhaps a couple of inches per day. I spoke with a friend at a local nursery and he said that perhaps I was foliar feeding too much, and that I am forcing the plants to grow faster than it can manufacture chlorophyll. This seems reasonable, and is easy to fix. I wanted to post this to get some other ideas about what it might be. The plants look great otherwise, it is almost 6 weeks old and roughly a foot tall. They are dark and bushy, and have stems roughly as big around as my pinky. Please let me know what you think. :weed:
 

Green Cross

Well-Known Member
I have an odd situation over here. I am fairly familiar with growing vegetables, and have seen most nutrient deficiencies, but could be mistaken. I have an aeroponics system operating at 6.0-6.1 pH and 1300 ppm. It stays between 75 and 80 in the room. Not only do I have an air conditioning inlet into the room, but two fans to keep the airflow kosher. I have recently started to foliar feed with aerated worm compost tea at 400 ppm. After the first feed, I noticed that the new leaves were yellow and then turned to green. I fed them again, thinking that it was a nutrient deficency, but it just made it worse. They are growing super fast, perhaps a couple of inches per day. I spoke with a friend at a local nursery and he said that perhaps I was foliar feeding too much, and that I am forcing the plants to grow faster than it can manufacture chlorophyll. This seems reasonable, and is easy to fix. I wanted to post this to get some other ideas about what it might be. The plants look great otherwise, it is almost 6 weeks old and roughly a foot tall. They are dark and bushy, and have stems roughly as big around as my pinky. Please let me know what you think. :weed:
Without seeing pictures I tend to agree with the first diagnosis. Have you ever noticed how the new growth on a fast growing plant is more yellow?
 
Without seeing pictures I tend to agree with the first diagnosis. Have you ever noticed how the new growth on a fast growing plant is more yellow?
I changed the solution, and I will get a picture the next post. Assuming it is the overfeeding, if I cut the nitrogen and keep the mag high, would they be ok? They look good otherwise, they are just showing signs of burning now. The res is sitting at 1000 ppm now of blooming formula and I gave their leaves a rinse. Please let me know what you think, and I'll put a picture up next time.
 
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