How fast do they recover?

[skeuerle]

Hello all I've got.....

2 Sativa dominate clones in
2 five gallon bubblers 10'' under
1 400watt HPS light on 18/6 for
2 weeks temps and humidity have
been 75f to 90f with 25 to 35% RH
Using GH nutes at 650 to 750ppm
PH has been as high as 6.2 but try to keep at 5.5
I have been seeing the tips getting dry
and burnt looking and the edges too.

Please help me get them back in the grove so i can go to flower
soon.
They have doubled in height since I've put them in the bucket, but I'm
worried about them.

Here is pictures, many thanks in advance.

[Greyhound]

Man.....this one is kinda hard because sativas are so finiky. I would say it is a potassium deficiency. Up your nutrient a little that has the potassium in it, and watch your PH level. Try to keep it in the 5.5 region.

[TexarkanaTim]

I don't know about nute burn, your dosage seems fine. Couldn't hurt to flush them anyway, to remove the built-up salts, etc. in the soil. And try to keep your temps down in the 75-80 range. 90 degrees is too hot and could cause other problems.

[Jim Dunlop]

Tips look like they're starting to burn, but the plant as a whole looks fine. You don't need that much nutrients in veg. Try a ppm of around 450 or so. In hydro, less is more I've found.

[skeuerle]

Thanks for the responses guys.... I have a 6 foot tall by 3.5 foot wide by 3.5 deep area to grow in. I've read that they will double in size when i put them into 12/12. Tallest is 13 inches
now. So I'm aiming for two more weeks.

Also on a side note I live in south Texas. It get hot and this grow is in my garage (no AC).
Any suggestions on how to keep cool? Should I start thinking bout buying a small window unit?

Any other Texas growers out there?