Purple leaves in week 5 of flowering
- Thread starter Sogmaster
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bam0813
Well-Known Member
Dear Sog,here is something I found idk.
Molybdenum Deficiency
Problem: The initial symptoms may appear similar to a nitrogen deficiency (yellowing of older, lower leaves). Leaves may become mottled or spotted. However, the tell-tale sign of a molybdenum deficiency is the leaves may start to display a unique orange, red or pink color around the edges which will start to move toward the center of the leaf. Sometimes the color appears in the middle of the leaves as opposed to the edges.
Solution:
A real molybdenum deficiency in cannabis is rare, and even scientists did not realize this mineral is needed by most plants because it is often present in low concentrations all the time.
For cannabis plants, molybdenum tends gets locked out at lower pH ranges. Your cannabis plant may show signs of a molybdenum deficiency if the pH at the roots is too low, although it is likely that molybdenum is there. That is because when the pH of your root zone is off, your cannabis cannot properly absorb molybdenum through its roots. Therefore the first step is to ensure that you have the correct pH for your growth medium. Learn more about pH and cannabis.
Please note: After a molyndenum deficiency is cleared up, the problem (pink coloring and yellowing leaves) will stop appearing on other parts of the plant, usually within a week. Please note that leaves which have been damaged by a molybdenum deficiency will probably not recover or turn green, so you want to pay attention to other growth for signs of recovery.
Molybdenum Deficiency
Problem: The initial symptoms may appear similar to a nitrogen deficiency (yellowing of older, lower leaves). Leaves may become mottled or spotted. However, the tell-tale sign of a molybdenum deficiency is the leaves may start to display a unique orange, red or pink color around the edges which will start to move toward the center of the leaf. Sometimes the color appears in the middle of the leaves as opposed to the edges.
Solution:
A real molybdenum deficiency in cannabis is rare, and even scientists did not realize this mineral is needed by most plants because it is often present in low concentrations all the time.
For cannabis plants, molybdenum tends gets locked out at lower pH ranges. Your cannabis plant may show signs of a molybdenum deficiency if the pH at the roots is too low, although it is likely that molybdenum is there. That is because when the pH of your root zone is off, your cannabis cannot properly absorb molybdenum through its roots. Therefore the first step is to ensure that you have the correct pH for your growth medium. Learn more about pH and cannabis.
Please note: After a molyndenum deficiency is cleared up, the problem (pink coloring and yellowing leaves) will stop appearing on other parts of the plant, usually within a week. Please note that leaves which have been damaged by a molybdenum deficiency will probably not recover or turn green, so you want to pay attention to other growth for signs of recovery.
- In soil, molybdenum is best absorbed by the roots in the 6.0 – 7.0 pH range (some growers recommend avoiding a soil pH of lower than 6.5 if you suspect a molybdenum deficiency)
- In hydro, molybdenum is best absorbed by the roots in the 5.5 – 6.5 pH range
Thx dear for the infos ! But my leaves turn purple not red or pink
1400 ppm total per feeding seems really high I almost killed my last grow due to over feeding my leafs turned purple cut your nutes if in soil for sure. What I've read should be about half that ppm if in soil.
I hope more experienced people will chime in.
Ps I may be wrong but I would cut nutes in half.
I hope more experienced people will chime in.
Ps I may be wrong but I would cut nutes in half.
Dear mattcheck every year i feed the same ppm levels but maybe this strain dont accept high levels of nutes ? And a overfeeding sign show in burnt leaves not in purple color
anexgrower
Well-Known Member
It doesn't look green enough, so something is off balance. What I would do: Flush with plain water then feed a light balanced NPK mix. This can fix a lot of problems, except overwatering...
But i gave them all what they want npk and micro and amino acids ! Soil PH 6.5 ! Ppm levels 1400 every second watering
anexgrower
Well-Known Member
1400ppm could be leading to salt buildup, flushing will help. Nutrient lockout: flush, then feed light. This strain may be sensitive to nutrients.
Ok dear thank you
Southernontariogrower
Well-Known Member
Imo ld look at ph first as low ph causes pretty much same look, some nutes drop ph a lot. I see info on ppm but nothing on ph. Just a thought, l know nothing, except my plant have same look from shitty ph that was well below 5.0 dissregard if using callibrated ph meter or drops.
Boreal Curing
Well-Known Member
In my opinion, it simple senescence. I'm going to guess this is a short flowering strain. So 8-10 weeks. The last few weeks the plant will stop taking up nutrients and start cannibalizing itself starting with lower fan leaves. That's why they start turning yellow. While most start changing colors regardless, colors will be intensified outdoors, especially with cooler temperatures, it's more a sign of maturity rather than deficiency.
I've panicked at the same thing before so I increased nutes. The added N simply foxtailed everything.
I've panicked at the same thing before so I increased nutes. The added N simply foxtailed everything.
Southernontariogrower
Well-Known Member
Or what Boreal said, lve had many start cannibaizing week 5. And they dont go the long haul. If everything in check. He might be on to something here. TY Boreal curing. Good answer, l concur my reply of low ph unless unchecked. Could be possibility then. Dont overfeed, not a good idea imo only!
Southernontariogrower
Well-Known Member
Pretty girls, like pink one!
Boreal Curing
Well-Known Member
Thanks. You get a few surprises when you leave them to their own devices in the wild. I've always tried to keep a cut of the odd interesting pheno, but I've only recently figured out a way to keep them alive when they're flowering in the field. I keep a few hydrated Jiffy Pucks in a baggie when I go out at harvest time to put them in. Too bad I missed that one.
Southernontariogrower
Well-Known Member
Id say too bad too! Sweet looking, ld of monstered a few lower buds and prayed they caught.