3 week DWC slow growth, droopy leaves.

[Beam]

- Strain is Green Bud by CH9
- 3 weeks (20 days) from seed
- 3gallon DWC in hydroton
- 250w HPS; 16/8
- humidity 20-30%
- room temp: 72-80 Fahrenheit
- reservoir temp: working on a timer schedule to keep it between 60-70. A week ago I was not using my aquarium heater, temps got down to 45f. If I leave the heater on it gets to 78f
- Currently fed 1/2 strength advanced nutrients ph perfect sensi 2 part and B-52 and voodoo juice (24ml/l base; 12ml/l additives)
- Using distilled water
- pH is 6.0; ppm is 750 at 0.5 conversion; EC 1.5
- Water level: Touching bottom of net pot

Started drooping a couple weeks ago. Is this over watering? Should I lower my water level?

 

[Beam]

Pic 1
Pic 2
Roots

 

[Agent SmokeAlot]

Overfed. Ppm is definitely too high for seedlings. Drop it down to 450 and raise it slowly from there once plants start recovering. Also if possible drop ph to about 5.5 and let rise to 6.1 and readjust.

 

[Beam]

Plant was drooping while at 230ppm as well, so after one week I increased. Was 230 ppm still too high for a plant this age?

 

[farmer jones]

Beam i have only run dwc one time. I had good luck though. I know that a soon as the plant had roots that were in the water, i dropped the water level about 1 inch. They took off after that.

 

[-Capfan-]

How close/far is the light?



Lets hit the reset button, i would higher the light abit

Run straight water for a day or two ( ph 5.4-6.0 )

Run a low Dose of ppm's, 200-300 to start


Raise the RH, 50-60 %


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As silly as it may sound, i suggest the light because last week, i had great looking month old girls under 4k MH, about 12-20 inchies above the canopy, lushes and green as can be, so i have a order of Fresh bulbs come in to replace everything with, change the bulbs ( about 6 months old, 18/6 hours ) and a day later, they have the look of your seedlings, the fan leafs looked stress, every line in the leaf is emphasized...

The only thing that changed was the fresh bulbs, i however did fresh water, and added nutes back 2 days later aswell as highering the lights another foot, and i was back in business...


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Edit : #2

Google Vapor Pressure Deficit aswell, might help ya.

 

[Agent SmokeAlot]

Plant was drooping while at 230ppm as well, so after one week I increased. Was 230 ppm still too high for a plant this age?

Drop it back down and raise slowly as new growth looks better.

 

[Bluewidow]

It's the humidity in your room, 20-30% is too low for flowering let alone vegging. You have to find a way to get that room up to ~60% for vegging.

 

[Beam]

Thanks everyone for the replies.

My light is 16 inches away from the top of the plant. Unfortunately due to the limited size of my cab I cannot raise it any further. I reduced the PPM to 250 and lowered the water to 1" below the bottom of the net pot.

I did some some reading on vapour pressure deficit and although I'm not convinced it is the problem, I have put a plastic dome over my plant and hung a damp rag in the cabinet. Will update in a day or two.

 

[RubeGoldberg]

spray them with your B-52 every few days.

your roots are not uptaking much.

The kelp/vitamins and shit in the B-52 will get your plant growing while you wait for the roots to catch up.

 

[Beam]

spray them with your B-52 every few days.

your roots are not uptaking much.

The kelp/vitamins and shit in the B-52 will get your plant growing while you wait for the roots to catch up.

Thanks, I'll do this. Should I use 2ml/l when mixing it?