I am very close to an AK harvest. I fear I may have overfed. Fans continue to yellow on some plants, not others. Seven in all. Heads have filled out nicely. White hairs 40-60%. Can I assume this to be indicative of the natural plant cycle? Been flushing for a week since last feeding. Cal-mag and FF nutes, climate controlled environment throughout grow from seedlings.
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Pics or it didn’t happen. 
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Have any pics? Could help a lot. Larger fan leaves will start to die off, as the plant is redirecting energy to the flowers. As long as it isn’t incredibly rapid, it’s fine and normal later in flower.
How have you been flushing? Plain pH’ed water? Sledgehammer?
What is your ppm going in at feed, and do you know your runoff numbers?
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No sledge yet. Should I start?
Check your runoff PPM’s. If you haven’t flushed with sledge yet, I would. FF nutes are notorious for salt buildup. Follow with plain pH’ed to kind of rinse out all the flush water, then wait a little bit until all the runoff is done, and give a full strength feed.
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This late in the game?
How long til you harvest? Or how long have you been in flower rather?
Seven weeks
Hmmm… 50ish% white hairs would put you probably closer to 3 weeks out. Do you know your runoff numbers?
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Define “runoff” relative to a soil grow. FF Happy Frog. I’m new here and trying to learn.
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Runoff is the drain water that comes out when feeding/watering. You want to check when it’s just about done draining out. Collect the last bit that is draining out and test ppm/pH. 20% is what most go for. 1/5 of what you put in. If a gallon goes in, wait til a couple/few cups come out and that’s your 20%.
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Could you guesstimate the daily water needs during late flower for a 5 gal grow bag.
When I was growing in soil, I’d easily go 3 days between watering at 1 and a half gallons per 5 gallon pot or until there is runoff.
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With nutes?
Yup Jack’s full strength
Let’s see those Trichomes and we can tell you real quick.
Already cut, dried and bottled. Tri’s were decent but poor lighting would not allow buds to put on weight.
Upgraded to HLG’s
I literally just realized it was in December…my bad. Congrats on the harvest and new light. HLG is quality equipment, you will not be disappointed.