Weird deficiency on 2 out of 3 plants.

goatlicker

goatlicker

Well-Known Member
Hi guys, 4 weeks into flower and having these deficiencies coming up..
One plant isn't affected at all and it's perfectly fine and green, other two are yellowing and having this brown stuff going on.
No idea what it is as it's only on the top part of the plant, none of the bottom leaves have this going on.
I'm in soil and under 400w hps, feed nutrients at 6.4, temps range from 75-85 and 60-70 lights off. 40rh on, 70 off ... Yes my fan runs all the time.. Dunno why it's so high.

Thanks
 

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polishpollack

polishpollack

Well-Known Member
the leaf edge curling is usually from room air temp that's too high. the brown spotting could be what is called heat damage. 85 is pretty high for an indoor grow. nice looking plants other than this.
 
goatlicker

goatlicker

Well-Known Member
polishpollack said:
the leaf edge curling is usually from room air temp that's too high. the brown spotting could be what is called heat damage. 85 is pretty high for an indoor grow. nice looking plants other than this.
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They started to curl in the last week or so as the weather outside has been really warm, usually not this hot but has cooled down again now.
Room was at 83 lights on last week or so and back down to 75ish now though.
They were really good up till the last week though.
Can't do much about it I don't think, it's the hottest part of the year for me at the moment.
Hopefully this doesn't affect my yield or quality etc..?
 
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rob333

rob333

Well-Known Member
goatlicker said:
Hi guys, 4 weeks into flower and having these deficiencies coming up..
One plant isn't affected at all and it's perfectly fine and green, other two are yellowing and having this brown stuff going on.
No idea what it is as it's only on the top part of the plant, none of the bottom leaves have this going on.
I'm in soil and under 400w hps, feed nutrients at 6.4, temps range from 75-85 and 60-70 lights off. 40rh on, 70 off ... Yes my fan runs all the time.. Dunno why it's so high.

Thanks
Click to expand...
you have over fed them they need a flush or they will taste bad
 
goatlicker

goatlicker

Well-Known Member
rob333 said:
you have over fed them they need a flush or they will taste bad
Click to expand...
I wouldn't have picked that. One plant on the left is perfectly fine and they all get exactly the same amount of nutrients and has zero sign of nuteburn?
It's not over the whole plant/s either, just a few colars affected and only the top part of the plant.
The were showing a little potassium deficiency I think it is when the stems are a purple and lower leaves dying so I fed one almost full feed then 3 days later did a half nutrient feed to pick them up but wouldn't have thought that would burn them like that?
 
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rob333

rob333

Well-Known Member
goatlicker said:
I wouldn't have picked that. One plant on the left is perfectly fine and they all get exactly the same amount of nutrients and has zero sign of nuteburn?
It's not over the whole plant/s either, just a few colars affected and only the top part of the plant.
The were showing a little potassium deficiency I think it is when the stems are a purple and lower leaves dying so I fed one almost full feed then 3 days later did a half nutrient feed to pick them up but wouldn't have thought that would burn them like that?
Click to expand...
each plant will take a fed different even if it is the same strain
 
goatlicker

goatlicker

Well-Known Member
rob333 said:
each plant will take a fed different even if it is the same strain
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rob333 said:
i would flush with double the ammount of your pot size and fed half strength for the next 4-7 days whats is ur ppm and ec btw
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yeah i realise that but to the point where they have zero signs but the others have heaps?
I under feed literally everytime by a about 1/4 under.
I didn't feed last watering and don't really like flushing.. I still don't think its nute burn, that shows up over the WHOLE plant doesn't it.
 
polishpollack

polishpollack

Well-Known Member
You can feed 1/4 under but if you feed to often, it builds up in the soil or coco or what have you. Maybe that's the problem.
 
goatlicker

goatlicker

Well-Known Member
polishpollack said:
You can feed 1/4 under but if you feed to often, it builds up in the soil or coco or what have you. Maybe that's the problem.
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Yeah, i guess.
I only feed every 2nd or 3rd watering, basically once a week depending how hot it is.
But when i started getting the deficiency i fed twice in a row which possibly made it worse?
So if it is that.. what do i do? Doesn't seem like i've fed to often though..
 
W

WeedZen

Member
goatlicker said:
Hi guys, 4 weeks into flower and having these deficiencies coming up..
One plant isn't affected at all and it's perfectly fine and green, other two are yellowing and having this brown stuff going on.
No idea what it is as it's only on the top part of the plant, none of the bottom leaves have this going on.
I'm in soil and under 400w hps, feed nutrients at 6.4, temps range from 75-85 and 60-70 lights off. 40rh on, 70 off ... Yes my fan runs all the time.. Dunno why it's so high.

Thanks
Click to expand...
How close is your light to the top of the plant?
 
rob333

rob333

Well-Known Member
goatlicker said:
yeah i realise that but to the point where they have zero signs but the others have heaps?
I under feed literally everytime by a about 1/4 under.
I didn't feed last watering and don't really like flushing.. I still don't think its nute burn, that shows up over the WHOLE plant doesn't it.
Click to expand...
well your the pro work it out lol
 
W

WeedZen

Member
goatlicker said:
Between 16-18 inches. 400w hps.
Same height its been the whole grow.
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Yeah good height for a 400W but...
So my situation is a 600W HPS and a number of times this occurs with me. Fading on top, lower leaves or leaves not in direct light are a healthy green. Everything going fine and around the end of the 4th going into the 5th week of flower the fading is starting to be noticeable with the edges of the leaves becoming a tad necrotic. This can be diagnosed as a heat issue (or more common a nute issue which I really doubt it is) when it's often a light intensity issue especially running a new bulb. So in my case when I spot this I'll raise the light about 4 inches and it slows to a crawl and pretty much stops but the faded leaves don't really recover back to where they were. Indica's seem to be more susceptible to this and show it sooner than sativa dominate.
Wouldn't hurt to try before flushing or adding anything.
Cheers!
 
goatlicker

goatlicker

Well-Known Member
WeedZen said:
Yeah good height for a 400W but...
So my situation is a 600W HPS and a number of times this occurs with me. Fading on top, lower leaves or leaves not in direct light are a healthy green. Everything going fine and around the end of the 4th going into the 5th week of flower the fading is starting to be noticeable with the edges of the leaves becoming a tad necrotic. This can be diagnosed as a heat issue (or more common a nute issue which I really doubt it is) when it's often a light intensity issue especially running a new bulb. So in my case when I spot this I'll raise the light about 4 inches and it slows to a crawl and pretty much stops but the faded leaves don't really recover back to where they were. Indica's seem to be more susceptible to this and show it sooner than sativa dominate.
Wouldn't hurt to try before flushing or adding anything.
Cheers!
Click to expand...
I did get a little bit of fade/yellowing on leaves of one of the buds that was higher than the rest @ like 3 weeks but didn't really care.
I figured it could be heat or something but it started as edges of leaves curling upwards and then into the necrotic looking shit on some bud sites.
They're all sativa dominant apart from 1 of them which is remo chemo and its not showing any signs of this problem..
I'll raise the light a bit and see if that helps and carry on feeding.
I'll never flush my plants, makes no sense when i've not overfed and PH is perfect going in and out.
Thanks for the help.
 
W

WeedZen

Member
goatlicker said:
I did get a little bit of fade/yellowing on leaves of one of the buds that was higher than the rest @ like 3 weeks but didn't really care.
I figured it could be heat or something but it started as edges of leaves curling upwards and then into the necrotic looking shit on some bud sites.
They're all sativa dominant apart from 1 of them which is remo chemo and its not showing any signs of this problem..
I'll raise the light a bit and see if that helps and carry on feeding.
I'll never flush my plants, makes no sense when i've not overfed and PH is perfect going in and out.
Thanks for the help.
Click to expand...
Hope it works out!!
 
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