Yellowing fan leaves closing in on week 7 flower should I be concerned
- Thread starter Joker90
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inth3shadowz
Well-Known Member
Yellowing is a tricky subject that Ive unfortunately dealt with many many times. Even now I still have specific strains that yellow quite early. Here's the problem with it, it could be caused by NUMEROUS things...for instance, I had a girl who ate up all her nitrogen extremely fast in the stretch so I gave a little boost feed and she greened back up. But that doesn't always mean that's the right answer. It could be overwatering, underwatering, root temperature, potassium def, mag def, over nuting, cold gusts of wind...etc etc etc.
Don't start going crazy because I promise you'll make it worse. Give better details of your feed and medium so people can help.
Don't start going crazy because I promise you'll make it worse. Give better details of your feed and medium so people can help.
I'm using general hydroponics terra aquatica grow micro bloom with bio bizz all mix potting soil . I water about every 3-4 days . There is one other plant which is going the same way but not as fast , I've been periodically feeding calmag as well .
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twentyeight.threefive
Well-Known Member
Why?
One plant is showing signs of calcium Def aswell as phosphorus
Last I check soil pH was 6.8. maybe a little high .but not huge . pH pen every feed has been between 5.8-6.2
Overall with grow micro bloom npk is 8-6-11
.still learning about this stage of the grow . I know they generally require less nitrogen later into flower . But the yellowing is them potentially feeding on the nutes in the leaves . IE what could be nitrogen in this case.
Why do they do this even when you continue to feed nitrogen ?
Is this a good sign . Just a stage in the process?
Or is this overfeed ?
xtsho
Well-Known Member
Why are you adjusting the pH so low for soil?
Apostatize
Well-Known Member
Right, if you're still learning and using GH (or any product line), why deviate from the prescribed feeding schedule? Go back to where you're deviating from the product instructions, that's probably where you messed up. For example, GH suggests calmag until phases 7 & 8, not weeks 7 & 8. It doesn't say, spray when the sage and planets align; it says include in the feeding schedule through phase 6. Am I wrong? I know some people scale back the recommended dosages, but I'd think they'd be ill-advised to pick and choose which days they comply with what's needed -- no way you're maintaining a desirable ppm for each essential nutrient.
The soil was 6.8
The nutes are 5.8-6.2 ph
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Kassiopeija
Well-Known Member
BB soil doesnt contain much CaMg because the manufacturer expects it's fed with alcalinic tapwater.
Then it's organic so it has a tendency to acidify slightly as biological compounds break down.
The discolored tips of the new growth at the tops indicate a pH problem.
Feed at 6.5 next time and drain the old stuff out + throw that away.
Then it's organic so it has a tendency to acidify slightly as biological compounds break down.
The discolored tips of the new growth at the tops indicate a pH problem.
Feed at 6.5 next time and drain the old stuff out + throw that away.
So potentially this is a low pH problem from and causing less nutrients to be absorbed
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I haven't deviated . The only thing added was 0.5 ml cal mag every third feed
So realistically with bio bizz there is no real need to pH treat it sits around 7 , a day after the bite solution has been mixed untreated