Leaves curling down?

The leaves on all 4 of these are turning down, leaves don't look bad.

Aero/dwc hybrid system 30gal res light/water sealed.
Submerged 300gph pump feeding through pvc supply inside res via misters.

400w hps/mh conversion light

Just changed water cycle to 30min on/2hours off.

Light on 12/12 now for 5 days.

Nutes MG tomato at 1tbsp/gal.

Running 10gal of water/nutes.

Humidity staying around 50% working on getting that down now.

Temp 63f-75f.

Below is a pic yes the hps is on, I know I know, that us currently only light in grow room.

Any help is welcomed.

I've been getting a little of that curling down with my MiracleGro Tomato test. To me, it looks like a touch of N toxicity. But, the Tomato product is NPK ratio 1-1-1.2. That's not high in N.

I don't mind the tips pointing down, but some edges are soft/flappy and drooping down (like I see in yours). Not a lot. It seems to be recent growth (2/3s up). I assume it's N tox too.

I don't think I'm overfeeding. I'm not seeing salt buildup in the soil. No burnt tips. It's strange to see the same thing in yours (although you seem to have had some pH problems).

Yea I did, and limited to a crappy liquid pH test setup now that only reads 6.0-8.0. The leaves look healthy other than the curling on my plants. I was thinking N tox also but as with you, I don't think I'm over feeding. Growth has picked up the past week, 3 of the 4 showing 1/2 inch and more growth per day. The leaf issue just bugs me lol.

DarkWizard021 said:

I was thinking N tox also but as with you, I don't think I'm over feeding.

Click to expand...

FYI: I posted some photos of my N-tox leaves. If I grew MG Tomato again, I would try lighter feeding (I'm doing 1tsp/gal, or 3.6-3.8g/gal). I almost used the All Purpose product (NPK ratio 3-1-2). Seems like that would have been way too much.

I would scale back a little, but I went 12/12 3-4 days ago. I hate to screw with it now. I'm not sure 1-1-1.2 is enough for flower. I hate to reduce the strength and not know if I caused a P def (which I'm expecting).

I had this figured out like 10yrs ago when I first started using mg tomato, old age I guess but I forgot what I ended up doing to solve my issue, with yours in dirt I'm not sure tho. I'll remember eventually lol.

Ph off and over fertilization looks like. What temp is your Rez? If the water is warm that could be causing all sorts of issues. What do your roots look like? If you aren't over feeding it probably is an issue with the system as dwc can be very finicky.


Sent from my iPhone using Tapatalk

Yea I'm working the kinks out of it now, one thing that does concern me is the humidity, stays between 50 and 60, but I want it closer to 40