Advice needed. What is this leaf suffering from?

**lighting** · 05-22-2012, 02:32 PM

bump up your feeding

**jofey** · 05-22-2012, 04:22 PM

you learn the weight of your plant just after watering so you can judge when to water again(before and after water)

Originally Posted by switch

Im sure 28c is fine, all my grows have been this hot, theres not really any way of me changing it as the exhaust air just gets blown outside the tent into the room, but i have the door wide open at all times so the air dissapates into the house and fresh air gets sucked in up the stairs i assume. Ive got a little 6 inch circular fan in there as i havent got room for anything bigger. And fuck buying any a/c units or any shit like that.

What is the lift pot method?? never heard of it. I know the plant doesnt use much N during bud, but the leaves have yellowed so much that bud production has almost stopped!!

**nick17gar** · 05-25-2012, 08:55 PM

Originally Posted by Cobnobuler

Sometimes what looks like a deficiency, can also be a burn from too much nutrient.

no. nutrient burn will be ALWAYS burning on the edges of the leaves, starting with thge tips, and moving up the serrated edge. anything other than this is NOT nutrient burn,

this isnt to say, you cant be burning with one nute and underfeeding with another,

well, your temps are high, i try to stick to around 24C, and your very very low on phosphorus. up that, up the micro nutes, and up N *a little* and you shou;ld be fine

**Total Head** · 05-25-2012, 09:48 PM

the way it's yellowing from the bottom up definitely looks like N is missing from its diet, and as someone already mentioned, the single leaf pic also appeared to be lacking phosphorous. i'd step up the ppm on the feed. as long as you're not using a completely off-balance fert program, you should be fine. if needed, mix a bit of your grow formula into your bloom. i'm not familiar with your nute line but i find most bloom formulas way too low in N.