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Whats this look like?
- Thread starter Robm4n
- Start date
looks like....thrips or worse...mites.
examine the underside of leaf for tiny black spots or tiny white egg-looking insurgent, possibly in conjunction with webs.
if this is a deficiency/lockout, I don't know what it could be.
good luck.
examine the underside of leaf for tiny black spots or tiny white egg-looking insurgent, possibly in conjunction with webs.
if this is a deficiency/lockout, I don't know what it could be.
good luck.
Miraculous Meds
Well-known member
That's calcium. what medium are u in?
Look close there is a patten here, not bugs, ..as its to patten-sh, mid to late nute burn if in soil flush with 3 times the volume of the pot, allow to recover overnight or 1x day in dim light
if in DWC, dump the rez...clean well, reload, but cut back the nutes by 33%..upping 10% every 24 hours ..monitor closely
Of more concern is the faded leaf veins to me an early indication of (Mg) def(deficiency)
on the last flush, add 1 teaspoon of cal-mag or Epsom salts to the rinse, or go foilar with 1 x teaspoon to a pint hand sprayer fill with warm water shake well and spray 2-3 times per day for 1 week or until you see it clears ...
good luck
if in DWC, dump the rez...clean well, reload, but cut back the nutes by 33%..upping 10% every 24 hours ..monitor closely
Of more concern is the faded leaf veins to me an early indication of (Mg) def(deficiency)
on the last flush, add 1 teaspoon of cal-mag or Epsom salts to the rinse, or go foilar with 1 x teaspoon to a pint hand sprayer fill with warm water shake well and spray 2-3 times per day for 1 week or until you see it clears ...
good luck
It's definitely not nute burn, mag deficiency, or thrips.
Don't flush your plants because it can weaken them and if it is a fungus or deficiency that'll only make things worse.
It looks like leaf spot fungus to me.
What are you feeding them?
Any pictures of the whole plant?
Don't flush your plants because it can weaken them and if it is a fungus or deficiency that'll only make things worse.
It looks like leaf spot fungus to me.
What are you feeding them?
Any pictures of the whole plant?
Robm4n
Member
i'll get full plant pics up in a bit but there in promix, being fed Dyna gro grow, ph going in is 6.0 there under a 400 hps, all the plants arent showing this just a few the ones sitting next to them are fine, they are diff strains, seems to be starting low, when i look at the leaf i see rust spots, i have been growing for years but have never been good at diagnosing deficiencies and what not, i appreciate everyones help.
Miraculous Meds
Well-known member
Promix has naturally high ph from what I remember. Check ur run off ph, and ec/ppm and let us know what u get.
BigBozat
Member
Kinda looks like effects of wild pH fluctuations (and maybe cal or manganese)... but Vos is right: more pics of whole pant, more details of your grow b4 flame war breaks out, lol
Miraculous Meds
Well-known member
Don't worry about the ppm meter. U wanna check ph most, anyway. What this problem in general looks like to me is calcium is being locked out because of too much magnesium. Not because ur nutrients r off or u need more. Im sure they are adequate. Just when ph is high it makes mg more available, and that causes poor absorption of calcium. It happens to me in coco when my ph swings high. Don't add more ca or ca/mg, cause it will just exasperate the problem. The trick is to adjust the ph so calcium becomes available.
The other thing people goof up in this situation is to add lime, thinking they need more calcium. All that will do is double ur problem, cause now u have added more ca, throwing off ur ratios of nutrients, and also raising ph even more, locking out ca even worse.
I'm pretty sure calcium and magnesium are available through the same ranges. Calcium deficiency isn't as common as people think. If you're feeding a balanced nutrient with calcium in it, you shouldn't see one.
Whole plant pictures under normal light would be good.
Miraculous Meds
Well-known member
Higher ph allows more availability of mg. the now high available mg locks out the ca, making it deficient.
BigBozat
Member
My understanding was that papa's right about Ca & Mg being similarly avail thru the same pH ranges... in soil...
... but that in hydro, MM's right... they run at diff ranges (Cal more avail below 6, Mg more avail above 6), such that at higher pH Mg can lock out Cal...
Like Bozat said, in soil they're both available at higher ph range. The soil will buffer the water anyway, so a properly buffered compost shouldn't need it's water phing. That's what I was told when I grew in compost years ago, not to ph adjust your water. Everything I've ever grown in compost I've never once PH checked or adjusted and I've never had a problem feeding 7.4 tap water as long as the feeds are right. I think if something's being locked out by a a bad ph then it's where the buffer's set in the compost rather than the ph of the water going in. That's to the best of my knowledge anyway.
