7th week Flowering plant deficiency/ excess?

H

Hydro_guy

Member
OK so I'm in my 7th week of flower and my chemdawg isn't doing as well as my LSD strain. It's either withing or drooping and has dark green leaves. And one leaf has these tiny spots. Can anyone help me figure this out? One thing though, my lights are high bc my LSD is 5 feet tall and my Chemdawg is only 3 1/2 feet tall so idk if light distance is playing a part. But these symptoms just starting showing in the last 1 1/2 to 2 weeks. These are my parameters:

RODI water
83 degrees air temp
5.8 pH
50% RH
550 ppm
12/12 light schedule

Feeding:
General Hydroponics nutes (Micro and Bloom only, no Grow)
Mr Fluvic
Cleankelp
Diamond Nectar
Honey Chome
Flower Fuel

Stopped using CalMag..

Thanks guys!
 

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nonamedman420

nonamedman420

Well-Known Member
Watch your ppm's, if they drift up... the plant is telling you that it is not feeding as much as you give it. At about 7 weeks I would expect this to happen, they feed less towards the end. Learn to read the plant, it will tell you what it needs and does not like. PPm's climb, ph goes down...nute strength is too high, ppm's drop and ph rises... nute strength is too low. PH drops no matter what... likely root rot. When doing dwc I liked to aim low with ph and ppm and let ppm's go down and ph rise so the different elements get taken up during the swing from 5.6 to 6.2-6.3, I have had so much success this way. I hope at least this makes you think a little, even if you do not agree. good luck!
 
H

Hydro_guy

Member
nonamedman420 said:
Watch your ppm's, if they drift up... the plant is telling you that it is not feeding as much as you give it. At about 7 weeks I would expect this to happen, they feed less towards the end. Learn to read the plant, it will tell you what it needs and does not like. PPm's climb, ph goes down...nute strength is too high, ppm's drop and ph rises... nute strength is too low. PH drops no matter what... likely root rot. When doing dwc I liked to aim low with ph and ppm and let ppm's go down and ph rise so the different elements get taken up during the swing from 5.6 to 6.2-6.3, I have had so much success this way. I hope at least this makes you think a little, even if you do not agree. good luck!
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Thanks bud! I'll give it a shot.
 
H

Hydro_guy

Member
Billy the Mountain said:
You're wasting $$$ on the superfluous supplements. You don't need anything more than the base nutes.

Too much Nitrogen as mentioned previously

CalMag is a minor source of N (only 3ppm N, 13ppm Ca per ml/Gal for GH CalMagic)
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OK but what if I switched to tap water. The ppm of it is only 60. So I'm figuring that that's enough Ca in it. Am I wrong about that?
 
Rurumo

Rurumo

Well-Known Member
Hydro_guy said:
OK but what if I switched to tap water. The ppm of it is only 60. So I'm figuring that that's enough Ca in it. Am I wrong about that?
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you can find a detailed analysis of your tapwater online, I'd check and see how much of that is calcium just to be sure. My tap has 40 ppm calcium, which is nice, and allows me to play around with calnit concentration.
 
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