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Some Problems (Yellowing, Browning...)
Hi. I have 4 Kali Mist plants (LST) and 1 Afghan Kush in day 39 Flowering. There are some problems with them and I'll appreciate any help. Here are some pics:
First a general pic (it's just after watering so they are a little droopy):
P1000564.jpg
Now the problems:
P1000511.jpg P1000508.jpg P1000541.jpgP1000592.jpgP1000594.jpg
The yellowing of the tips first appeared around 20-th day of vegging. It affects mostly one of the plants, which is also affected by the browning. The yellowing appeared on another of the plants 1-2 weeks ago.
Now the browning:
P1000613.jpgP1000616.jpg
It's only on these three leafs. Do you know what is it? I hope it's not some kind of fungus.
Here is some info on the grow:
Air Circulation: Big fan
Light: 400W HPS
Temps: 64-75F
Humidity: 70-95% (I know it's extremely high. I started using dehumidifier and I hope to lower it to 60-70%)
Ferts: Bio-Grow, Bio-Bloom and Green Sensation
PH: around 7 I think (I use the color strips test)
The feeding (Days in flowering):
Day 3
Bio-Grow: 1lm/l (about 4ml/gallon)
Bio-Bloom: 1lm/l (about 4ml/gallon)
Day 7
Bio-Grow: 1lm/l (about 4ml/gallon)
Bio-Bloom: 1lm/l (about 4ml/gallon)
Day 11
Bio-Grow: 1lm/l (about 4ml/gallon)
Bio-Bloom: 1lm/l (about 4ml/gallon)
Day 14
Bio-Grow: 1lm/l (about 4ml/gallon)
Bio-Bloom: 2lm/l (about 8ml/gallon)
Day 20
Bio-Grow: 1lm/l (about 4ml/gallon)
Bio-Bloom: 2lm/l (about 8ml/gallon)
Day 25
Bio-Grow: 0.5lm/l (about 2ml/gallon)
Bio-Bloom: 2lm/l (about 8ml/gallon)
Day 30
Bio-Grow: 0.5lm/l (about 2ml/gallon)
Bio-Bloom: 3lm/l (about 12ml/gallon)
Day 34
Bio-Grow: 0.5lm/l (about 2ml/gallon)
Bio-Bloom: 4lm/l (about 16ml/gallon)
I tried to give as much info as possible. That's my third project and I never had so many problems...
Please, help. I really want to finish these Kali Mists successfully. Thanks
P.S. I came to a conclusion that the yellowing is caused by Potassium deficiency. Here is why:
P1000511.jpgcannabis leaf-deficiencies.jpg
What do you think?
If that's the case, should I start with the Green Sensation (NPK 0-9-10) on full dosage? How should I combine it with the Bio-Bloom?
Thanks again
Last edited by Pathaway; 06-08-2012 at 03:04 AM.
Anyone help?
Yes, they're def and u can see that clearly in pic 7. In the 5th week of flower they need more P & K. I can see that u can been adding slowly to ur feed. I would combine ur P K 0-9-10 with ur normal food as they look low on N too.
I don't use ur nutes so wait for someone else who does to advise u on the dose. Go easy and expect to wait a few days to see the buds swell and leaves colour up.
Any chance they got overwatered?
I actually only grow long stemmed roses. I think the government should make laws against that stuff(pot). If you can afford it donate to seed banks to ensure the species.
Maybe the high RH is reducing transpiration and nutrient uptake.Originally Posted by bird mcbride
Is there a good vent fan apart from the oscillating fan?
I see signs of both P and K deficiency. I have never used Green Sensation but it contains what your plants are looking for. Be sure to keep including a bit of your grow nutes as an N and micro source.......
Just call them Ahab and defoliation their White Whale....
I doubt it.
I usually wait 4 days between waterings and I water when the plants start to droop a little.
As the RH is high I'm careful not to overwater, because I fear mold and fungi the most...
The grow is in a basement with very poor hygiene and very high RH (that's the price I have to pay for cooler temps in the summer).
I water with about 0.30 gallons of solution and the size of the pots is about 3 gallons.
Last edited by Pathaway; 06-09-2012 at 07:54 AM.
The big oscillating fan is the only one in the basement. The pots are not in a box, but are just surrounded by a hanging white oilcloth.
The grow is in a spacious basement and from time to time I let fresh air in by opening the outside door.
I'm in my 4th wk of flower and my tips are yellow as well, no brown tho. Would love to hear what you resolved to do.
That is a P and K combo deficiency. I see traits of both deficiencies in your leaves. High humidity can limit the uptake of mobile elements. Get that humidity down!
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