Hi i have 2 roughly 3 week old vannila kush which i grew from seeds. I have them in a nft system under a 400w hps. both of them are gettin brow/yellow spots on the lower set of leaves. And one of them has very light green leaves compared to the other i know this is hard with no pics but i have no way of gettin any uploaded at the moment. Any help would be appreciated.
Help needed with new grow problems
- Thread starter Jiujitsu
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bucktoothal
New Member
Sounds like a Ph issue to me.
Sounds like ph to me too...
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- #5
i checked ph its not been above 6.0 for the last 3-4 days but the orange/brown spots have spread to the leaves above the bottom ones. Its def not as bad but im still worried. How long will it take for it to get back to norm if i maintain my ph?. Also the nft tank which holds water nutrients seems to be a little warm think above 20c could this be affecting them?
Any help would be appreciated thanks.
SSNUGS
New Member
Sounds like reservoir temp and maybe a RH issue in the lower part of your room. Do you have good air movement at the base of you plants? you may want to give a little nitrogen boost to help maybe with some Revive from AN or Verde from Humboldt Nutrients. Not much needed just a little boost to get them out of the funk they are in.
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- #7
Sounds like reservoir temp and maybe a RH issue in the lower part of your room. Do you have good air movement at the base of you plants? you may want to give a little nitrogen boost to help maybe with some Revive from AN or Verde from Humboldt Nutrients. Not much needed just a little boost to get them out of the funk they are in.
Yea there is plenty air movment at base got a fan running 24/7. How else can i keep the resvoir temp down? . Only thing i can think of is lifting the lights higher so they are further from the nft tank. But they will also be further away from the tops of the plants.
Your res temp is fine. How much are you feeding, you might want to increase dosage a bit.
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- #9
using ionic neuts currently dosage is half the recommended was worried about over ferting them. I will upload pics tmrw they currently around half a foot or so
and theres no marks on the new leaves just on the bottom set of leaves and some on the sets of leaves above them.
Pics always speed the diagnosis process up 
It's possible you had a pH issue and have corrected it, which is why the new foliage seems fine.
It's possible you had a pH issue and have corrected it, which is why the new foliage seems fine.
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- #11
Pics always speed the diagnosis process up
It's possible you had a pH issue and have corrected it, which is why the new foliage seems fine.
heres the pics
Fuzzy Duck
Well-Known Member
Thats a really groovey shade of green, if they was such a thing as mutant acid puke it would be that colour !
Looks like a nitrogen defeciency to be honest, not sure about those spots tho at the moment will require in depth research, maybe a goverment grant for a 5 year project to work it out - only joking
First of all, do you flush ya nutrient reserva every 7 to 10 days and replace nutrients with a fresh batch ?
Failing to do can cause lock outs, blocks & all sorts of problems like defeciencys.
Adjust you feeding regime to full strength nutes, do it in stages if ya paranoid about fragging em.
Thoughts on spots... pest like thrips, ozone damage ? Mmm maybe...
Looks like a nitrogen defeciency to be honest, not sure about those spots tho at the moment will require in depth research, maybe a goverment grant for a 5 year project to work it out - only joking
First of all, do you flush ya nutrient reserva every 7 to 10 days and replace nutrients with a fresh batch ?
Failing to do can cause lock outs, blocks & all sorts of problems like defeciencys.
Adjust you feeding regime to full strength nutes, do it in stages if ya paranoid about fragging em.
Thoughts on spots... pest like thrips, ozone damage ? Mmm maybe...
Fuzzy Duck
Well-Known Member
After consulting some hippys with a chainsaw... it might be this.
A potassium deficiency sometimes resembles lack of nitrogen in the first stages of leaf deterioration. But the difference is that the leaves also develop rust-colored spots. Eventually the affected leaves wilt and drop.
The leaf tips on healthy leaves may turn brown and resemble the symptoms of over-fertilization. This is due to a disruption in transpiration (since potassium regulates the opening and closing of the stomata on the leaf surface, where water evaporates from the plant and gases such as CO2 are drawn in).
In severe cases the stems become brittle.
A deficiency is more common in older plants and therefore the flowering phase will be negatively affected. You can expect low yields.
A potassium deficiency sometimes resembles lack of nitrogen in the first stages of leaf deterioration. But the difference is that the leaves also develop rust-colored spots. Eventually the affected leaves wilt and drop.
The leaf tips on healthy leaves may turn brown and resemble the symptoms of over-fertilization. This is due to a disruption in transpiration (since potassium regulates the opening and closing of the stomata on the leaf surface, where water evaporates from the plant and gases such as CO2 are drawn in).
In severe cases the stems become brittle.
A deficiency is more common in older plants and therefore the flowering phase will be negatively affected. You can expect low yields.
- Thread starter
- #14
SSNUGS
New Member
If it isn't alive get rid of it. Dead foliage will just cause you a lot of headaches down the road.
FrankFoster
New Member
P def causes the purpling of the stems. but genetics plays a big roll, RE og kush looks purple stemmed 24/7 in perfect conditions.
your plant has deficiency due to lockout caused by ph problems and nute uptake issues.
Check you water first, hopefully its at like 7.5+
Then you can ph the water to 5.2 and let it rise to approx 7.2 over the course of the week. Use a ph down product. with food grade phosphoric acid and humic acid and folic acid... I stay away from citric acids myself...
Over the course of the rise. (PH rises in water is generally based on the calcium o2 bonds) the plant will uptake the range...
Then you can ph down again or you can replace the res.
update us on those babies soon. ltr
your plant has deficiency due to lockout caused by ph problems and nute uptake issues.
Check you water first, hopefully its at like 7.5+
Then you can ph the water to 5.2 and let it rise to approx 7.2 over the course of the week. Use a ph down product. with food grade phosphoric acid and humic acid and folic acid... I stay away from citric acids myself...
Over the course of the rise. (PH rises in water is generally based on the calcium o2 bonds) the plant will uptake the range...
Then you can ph down again or you can replace the res.
update us on those babies soon. ltr
- Thread starter
- #17
Things seem to have got worse plants still growing alot but new leafs are thin and curling at the ends bottom leaves still gettin weird spots it seems to have got worse since i changed the nutes earlier this week. pH seems within range never lower than 5.0 or higher than 6.5. I will upload pics in a bit. Really worried any one any ideas??
- Thread starter
- #18
Ok i have some new pictures. The plants still seem to show alot of growth. One of the plants is really light green but its been like that since germination. The ph never been above 7.0 and never lower than 5.0 humidty is between 30-60% and day temp never above 27 celsius and night time 15-16 celsius. I use ionic nutes in my nft system. This week i added a full strenght soulution which i think has caused nute burn but not sure. Any one know what i have done to my plants??. Also some of the new leaves seem really thin and curl at the edges.
https://www.420magazine.com/gallery/data/500/IMAG00258.jpg
this is one of the bottom set of leaves that i had problems with at start when i fked my ph up
https://www.420magazine.com/gallery/data/500/IMAG002413.jpg
some of the new growth at bottom.
https://www.420magazine.com/gallery/data/500/IMAG002317.jpg
some new growth at top i think its nute burn?? also alot of curles leaves
https://www.420magazine.com/gallery/data/500/IMAG002014.jpg
What should i do my ph is sittin at about 6.0 at moment i changed the nutes on tuesday that just passed.
Also should i trim dead or damaged leaves and where should i prune from?
https://www.420magazine.com/gallery/data/500/IMAG00258.jpg
this is one of the bottom set of leaves that i had problems with at start when i fked my ph up
https://www.420magazine.com/gallery/data/500/IMAG002413.jpg
some of the new growth at bottom.
https://www.420magazine.com/gallery/data/500/IMAG002317.jpg
some new growth at top i think its nute burn?? also alot of curles leaves
https://www.420magazine.com/gallery/data/500/IMAG002014.jpg
What should i do my ph is sittin at about 6.0 at moment i changed the nutes on tuesday that just passed.
Also should i trim dead or damaged leaves and where should i prune from?
- Thread starter
- #19
FrankFoster
New Member
I see it as an initial nute burn combined with either an o2 def, or P/cal def based on ph.
Do you have algae in your res or on roots? It could be that the Algae is sucking up the oxygen in you solution, should have aerators in the mix???
Or your solution is too many ppm for the plants... this would be fixed at 75% strength.
If the ph is above 6, in hydro, get her down... or and calibrate your ph meter.
the purpling and then these issues show p def... Maybe edge it over to a n-P-K (emphasis on P&K)
Then nute burn might have shocked the plant and the regular nutes are not going up... In this case I have seen 30-50% nutes for the recovery, as the nute burn causes lockout and then the plant refuses to eat after everything is set right, and they seem to like the lower ppm mixes.
Finally, does the plant have a disease or a pest problem... Root aphids, fungal gnats... these are common and microscopic and cannot be seen without a scope.
Do you have algae in your res or on roots? It could be that the Algae is sucking up the oxygen in you solution, should have aerators in the mix???
Or your solution is too many ppm for the plants... this would be fixed at 75% strength.
If the ph is above 6, in hydro, get her down... or and calibrate your ph meter.
the purpling and then these issues show p def... Maybe edge it over to a n-P-K (emphasis on P&K)
Then nute burn might have shocked the plant and the regular nutes are not going up... In this case I have seen 30-50% nutes for the recovery, as the nute burn causes lockout and then the plant refuses to eat after everything is set right, and they seem to like the lower ppm mixes.
Finally, does the plant have a disease or a pest problem... Root aphids, fungal gnats... these are common and microscopic and cannot be seen without a scope.
