Can't figure out what's wrong...
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3 weeks from bagseed,
1" rockwool cubes (pH buffered) and hydroton,
8" net pots in five gallon buckets with bottoms cut out.
Flood & Drain / Ebb & Flow,
40 gallon reservoir. (res temp 71 F)
RH = 40%
Growroom temp = 75-78 F
250watt HPS light, with two 48" Floro tubes as side lighting, and a CFL for good measure.
for the first 2 weeks, no nutes, plain RO water with a base ppm of 25
then last week changed reservoir to 100 ppm.
maintaining 5.5-5.8 pH
Showed signs of yellowing on the cotyledons today, bumped ppm up to 175.
Extremely slow growth... using GH microgrow with liquid karma, hydroguard, calmag, and superthrive, all in miniscule amounts as my ppm is only 175 currently from a base of 25.
The plant that is drooping's rockwool cube was farther down on the flood line, which is why I believe that it was overwatered. (the cube was very moist on the top when I checked). None of the other plants show signs of under/over watering
So I raised the rockwool cube on the droopy plant so it was higher up, so only the roots below the rockwool cube will flood, not the rockwool cube at all.
It has been about 3 days, and has not improved. Can it still be in the position of OVERwatering, but actually be underwatered now since the rockwool isnt getting remoistened?
Why are they growing so slow.. I know it's not just in my head
Only one of the plant's has roots below the net pot, which is amazing because these net pots are SO deep, and the plant is SO small.
I was not expecting to see roots at all.
advice please !! i would be greatful
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