Under feeding or over feeding

Wigz420

Member
So I’m about 4 weeks into flower and my plants have started rapidly yellowing it’s started from the older fan leaves and is working it’s way up I did flush the other day after adding too much nutes too the feed by mistake I’m using all organic iv herd flushing isn’t good because it takes awhile for the nutes to build up have I under feed or over feed
 

Romulanman

Well-Known Member
It sounds like you have a nitrogen deficiency. If it starts to get worse add a little more N to the bloom nutes.
 

Mullumbimby

Well-Known Member
This is more common that you may realise and also, a great learning experience.
Around 3 or 4 weeks, yellowing is common in fast-growing plants and may be a lack of nitrogen, magnesium or both.
I've had success with a cal-mag supplement that also contains nitrogen and I use it for about the first 3 weeks of flowering to address this problem exactly.
The trick seems to be to add the supplement to a bloom nutrient mix but not exceed the total ppm to the point where there is burning, or other signs of excess nitrogen.
 
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