Yellowing leaves at start of flowering

Billy25

Billy25

Member
hotrodharley said:
Check this. Remember I said not heavy!

https://www.softsecrets.com/gb/news/national/nitrogen-and-cannabis/
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Very interesting article; thanks for the link. I try to be "scientific", and change only one variable at a time till it becomes clear that one change has had an effect or not. Still not convinced that the damage is spider mites, as the black specs don't look like any of the pictures I've seen even under the loupe. But, the spinosad won't hurt anything, and if it is bugs and I just can't see them, it could help prevent a disaster.
If there is no effect, I'll add a touch of N, a bit at a time and try that route. In the meantime, the buds appear to be continuing to develop, and that's the main thing.
This is only my second grow. The first was not successful, as the 3 autoflower strains I planted only produced a few grams each. Thank goodness the 4th plant, a White Widow Fast, grew a lot better and produced just over an ounce!
 
Kushash

Kushash

Well-Known Member
Billy25 said:
Very interesting article; thanks for the link. I try to be "scientific", and change only one variable at a time till it becomes clear that one change has had an effect or not. Still not convinced that the damage is spider mites, as the black specs don't look like any of the pictures I've seen even under the loupe. But, the spinosad won't hurt anything, and if it is bugs and I just can't see them, it could help prevent a disaster.
If there is no effect, I'll add a touch of N, a bit at a time and try that route. In the meantime, the buds appear to be continuing to develop, and that's the main thing.
This is only my second grow. The first was not successful, as the 3 autoflower strains I planted only produced a few grams each. Thank goodness the 4th plant, a White Widow Fast, grew a lot better and produced just over an ounce!
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Do the black specs look like this?
tpoop.png
 
rob333

rob333

Well-Known Member
Billy25 said:
Plants are in soil (cheap Kellog's Patio-Plus). In cloth grow bags, 10 gal..
Feed water is around 900 ppm
I feed them with each watering.

Spots are a lighter yellow, not at all shiny.
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they need to be on round 1200-1600ppm round 3 weeks of flower theres your issues
 
rob333

rob333

Well-Known Member
hotrodharley said:
Forget the heavy nitrogen! Forget the heavy nitrogen! Forget the heavy nitrogen!
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you and your godamn nitrogen and calcium is that your answer for every goddamn thread each thread you post in is either calcium or nitrogen issues stop spreading your shit lololol just joking
 
hotrodharley

hotrodharley

Well-Known Member
rob333 said:
you and your godamn nitrogen and calcium is that your answer for every goddamn thread each thread you post in is either calcium or nitrogen issues stop spreading your shit lololol just joking
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I'm trying to dissuade people from being heavy on nitrogen in flower. By using cal mag it supplies nitrogen. The nutes have nitrogen in the micros. In my own hard learned experience nitrogen from about week 4 of flower needs to be cut back. If not nute burn or unwanted late flower growing etc.
 
hotrodharley

hotrodharley

Well-Known Member
In fact I have basically switched to Lucas formula after one last high nitrogen feed early in flower. Only one strain showed any nitrogen deficiency in mid-flower and a touch of nitrogen solves that.
 
rob333

rob333

Well-Known Member
hotrodharley said:
Cal mag has nitrogen and is needed in flower. Any micros have nitrogen. Don't cause it to go weird or start foxtailing.
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hotrodharley said:
I'm trying to dissuade people from being heavy on nitrogen in flower. By using cal mag it supplies nitrogen. The nutes have nitrogen in the micros. In my own hard learned experience nitrogen from about week 4 of flower needs to be cut back. If not nute burn or unwanted late flower growing etc.
Click to expand...
Cal mag is used also Epsom salts to 'cure' Mg Def. but this Mg def. is an old tree/plant issue unless you use RO water, which strips out the calcium, thru the RO process anyways, and so is best to add every time you feed, just a pinch of cal mag to your feeding at each feed, but if you don't use RO water and are over calcifying your water you will be in shit street
 
rob333

rob333

Well-Known Member
hotrodharley said:
I'm trying to dissuade people from being heavy on nitrogen in flower. By using cal mag it supplies nitrogen. The nutes have nitrogen in the micros. In my own hard learned experience nitrogen from about week 4 of flower needs to be cut back. If not nute burn or unwanted late flower growing etc.
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Really please explain to the membership why (N) is required in Bud...? cause in my 45+ years it aint used in the flowering process at all, (N) is used by the plant and the grower, to create body,
volume en masse, or in this case cellulose stuff like leaves and branches
 
Kushash

Kushash

Well-Known Member
Billy25 said:
Yes! Just like that. Insect droppings? I did finally see just one little bug - beige short-legged spider-looking thing.
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Yes it is poop. Your pest is likely thrips.
Thrips are a problem but not nearly as bad as spider mites.
Here is a picture of thrips in different stages of growth.
5 thrips.jpg
 
whitebb2727

whitebb2727

Well-Known Member
Billy25 said:
Yes! Just like that. Insect droppings? I did finally see just one little bug - beige short-legged spider-looking thing.
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That is spider mites. Get the spinosad immediately.

Edit. How big is the spider looking thing? About the size of pin head will be a mite.
 
Billy25

Billy25

Member
whitebb2727 said:
That is spider mites. Get the spinosad immediately.

Edit. How big is the spider looking thing? About the size of pin head will be a mite.
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Spinosad applied yesterday. As soon as you mentioned it, I got some and sprayed the plants. Roughly head-of-pin size, no bigger. May be my eyesight, but I need a magnifier to see them. The poop I can spot due to the color contrast.
 
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