Need help

M

miczbuhanen

Active Member
Hello, my plants are yellowing and i don't know what is this. Photos are from 63 day of life and 35 day from switching to 12/12.I am running 7xmimosa evo from barney. Mostly affected are leaves in the middle. I use biobizz biogrow topmax biobloom and bio pk. I used also ghe tripart because some of them started to yellow at the Beginning of the flo but they recover but now i can't deal with this. My setup:
Samsung lm301h running at 460w about 50cm above canopy luxmeter show max 45klux. Co2 1000-1500 ppm. Watering with tap water [ Sometimes i use rainwater with added calmag, sometimes i use also Epsom salts. This is my Third grow running co2 and can't deal with this
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W

whelk

Well-Known Member
Buds looks fine. I wouldn't worry
I've had that yellowing even earlier in grow and still got great weed with decent yield
 
go go kid

go go kid

Well-Known Member
i was go
going to say watch out for brown spots to start appearing, if they do, it could be a K/ potassium inbalance, possably not enough
 
T

Treesomewanted77

Well-Known Member
I think that’s way too much cal/mag for a soil grow using tap water. I’ve never had to add any when using tap water and soil. I think you may be overdosing the cal/mag and causing a lockout.
It’s soil keep it as simple as possible just use a well balanced nutrient every third watering until the soil is depleted then feed every other watering. That’s my opinion anyway.
The whole idea of growing in soil is for simplicity and your just making it complicated
 
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