Leaf Tip Question

Hi All,

Thanks for all the help, you guys have been integral to my garden so far.

I am growing four plants, all different strains, feminized seeds. They started under CFLs and have been under a 400W MH for the past 6 days and showing lots of growth. They are growing probably about 1/4 inch a day. Recently, on two of the strains, the leaf tips have been curling upwards slightly. I grow in a soil mix with some organic worm castings. Color of leaves is fine. Temps are around 81F with the lights on and 72F lights off. I havent watered since I transplanted (pots are getting lighter, but soil is still very moist). The only reason I could think is that I started the MH about 24 inches away and have slowly brought it down to 15 inches today. I have it in a cooltube so temps do not get above 82F.

Is this normal?

If not, any ideas?

Thanks a lot.

are you using nutrients when you water ? whats the ph of soil ?could be mag deficiency ? or humidity is to high and leafs are trying to perspire

I transplanted 6 days ago and only gave them Technaflora's transplant recipe at 1/4 strength plus PH adjusted water. I have not watered since then as the soil is still dark and moist on top (although it has significantly lost weight). I transplanted from beer pong cups to 2 gallon pots. The soil is 50% organic soil mix, 20% Coco Coir, 20% Perlite, 10% Worm Castings. PH of soil is fine. Humidity is actually pretty low (low 50s and 40s). I have a humidifier in the box even. It would be 10 or 20 w/o one. The humidity does get up pretty high when the box is off though (humidifier shuts off with light).

Your room temp is fine, but the curling up of the leaves edges is normally caused by heat. What is the temp at the point of those affected leaves, can you keep your hand there without it becoming uncomfortable ? If not then the light is to close.

Yes, my hand is more than comfortable and the light is 12 inches away. I have a 6'' Cool Tube so I can get it pretty close.. but still, 12 inches isnt that close considering other grows I have seen.