Hydroponics: Seedlings not growing ++rep

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bigbuddc

Well-Known Member
Hey RIU,

Im new to hydroponics and I have 7 Critical Mass seedlings growing.

I germed about 3 weeks ago and placed them in rockwool cubes.
I have a 96W T5 for light and Im using GH nutes.
The room was pretty hot for a while (80-85F) but I have gotten that under control
temps now aroud 75-80F.

LIGHTS: 96W T5 20on/4off
TEMPS: Around 78F
NUTES: General Hydro Flora
I feed about once a day PPMs around 450 and pH 5.5-6.0

They were growing good for about the first 2 weeks but no growth since,
I can see roots in the bottom but not many.

Anyone with hydro experience please help.
 

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Nullis

Nullis

Moderator
Keep in mind that I don't do hydroponics, but I am certain that 450 ppm might be a bit too high for those little seedlings. Remember that they have stored food anyways, something below 200 ppm seems more appropriate to start them out on.
 
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bigbuddc

Well-Known Member
yea i flushed and ill go back to tap water and see if that helps thanks guys

also should i be using a heat mat
 
Heisenberg

Heisenberg

Well-Known Member
If you see roots at bottoms of the cubes, put them into your growing media. Either bigger cubes or hydroton or whichever. Your roots may be getting air pruned.
 
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