Advice needed. What is this leaf suffering from?

nick17gar

nick17gar

Well-Known Member
what part of the grow process is that plant in?


first it looks yellow, so yea lack of N
second, theres brown spots on the leaves, large, and sporadic, like shit streaks, thats a lack of Phosphorus


also, more pics = more help. more info = more help.

lighting? what are ya feeding? hows the entire plant look? where was this leaf taken off of? is the entire plant like this? just new growth? just old growth? did it fall off by itself or did you tug it? is it still growing/making nugs? room temp? water temp? water PH? run off PH? hell, soil or hydro?
 
S

switch

Well-Known Member
600w Hps, in flowering stage bout 4weeks in, canna terra flores, cannazym, bloombastic and liquid silicon. Most of the plant looks like that but not quite as severe, that leaf was took from the middle. I pulled it off. Temps about 28-30 Celsius, ph and runoff ph is 6.5, soil grown.
 
jofey

jofey

Active Member
28 c is very hot is that not over 80 ?(thats seems a bit high, no?) whats your humidity and air flow in the room is your plant getting fresh air? i used canna for my last grow and found that it was easy to over feed with , what about folar feeding (i only folar feed under my leaves!) remember the plant dos'nae use a lot of N during flower so fan leaves die .. are you using the lift the pot method for watering ? it has to be the best thing i've learned so far ! cos not all plants are the same, some like more or less food than others , are you letting the roots dry enough before you water?, i would use nowt but P h'd water for a few day's and if its the feeding you'll find out quick enough .... good luck pal ...may your grows be healthy and DANK
 
spitsbuds

spitsbuds

Well-Known Member
to be honest its really to help you with just on pic of just one leaf. for any exp grower to help you and give you solid advice. you need tp post a pic of all the plant and also put up ore detailed info like what nick17 ask for. also nick17 one wrote a amazing piece on plat problems the best ive seen tbh. you should be able to find it if you look or type in the AS box.
 
S

switch

Well-Known Member
S

switch

Well-Known Member
jofey said:
28 c is very hot is that not over 80 ?(thats seems a bit high, no?) whats your humidity and air flow in the room is your plant getting fresh air? i used canna for my last grow and found that it was easy to over feed with , what about folar feeding (i only folar feed under my leaves!) remember the plant dos'nae use a lot of N during flower so fan leaves die .. are you using the lift the pot method for watering ? it has to be the best thing i've learned so far ! cos not all plants are the same, some like more or less food than others , are you letting the roots dry enough before you water?, i would use nowt but P h'd water for a few day's and if its the feeding you'll find out quick enough .... good luck pal ...may your grows be healthy and DANK
Click to expand...
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!!
 
Hiabovetherim

Hiabovetherim

Member
The whole plant picks definitely looks like lack of nitrogen to me.
The single leaf is indicative of phosphorous deficiency.
But I'm a newb so take my advice for what it is. But like jofey said, the plants don't go crazy for nitrogen at that point in flowering. Maybe it's getting too much.
 
jofey

jofey

Active Member
you learn the weight of your plant just after watering so you can judge when to water again(before and after water)
switch said:
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!!
Click to expand...
 
nick17gar

nick17gar

Well-Known Member
Cobnobuler said:
Sometimes what looks like a deficiency, can also be a burn from too much nutrient.
Click to expand...
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

Total Head

Well-Known Member
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.
 
You must log in or register to reply here.
Top