Massachusetts Outdoor Grow 2019
- Thread starter stealthfader508
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stealthfader508
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i was worried about hail but we didn't get anything ... there goes the hottest July ever on record, see ya ... i got some shit going on with the ladies I gotta figure out... tons of yellowing bottom leaves and some are actually turning black on the tips
mr_c
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pictures will help
stealthfader508
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you gotta zoom in but you can see the tips of many fan leaves are turning black, ill try to get better pics tmrw in the sunlight ... i pulled a ton of yellow leaves off the bottom of the plants that turned in just the last few days ... it's happening on several of the plants so that tells me it's probably something I'm spraying ... i had a bunch of mealy bugs this past weekend and i sprayed a mixture of neem/all seasons on them .. it got rid of most of the mealy's but this happened shortly after
stealthfader508
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here's a cpl more .. it's pissing me off
BigSco508
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Have you checked your PH lately ? Looks like Nitrogen deficiency because it's only the bottom leaves how's your Airflow ?
Leetwain
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It's been a while since I posted.....Outrageous growth, many over 6', all topped 3 times at least.....Top dressed with blood meal twice, soon to be top dressed with fish bone meal, kelp meal, earthworm castings, gypsum, azomite rock dust, oyster shell. Sprayed weekly with zero tolerance. Here's to hoping for a dry Fall! Good luck to all!
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stealthfader508
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Thx Sco .. I've never checked PH, probably should, I've been using mostly a/c condensate water, which I've always believed to be ph neutral, but I could be wrong .. I'm also wondering about an N deficiency because I don't really ever feed them anything with high N ... when I initially mixed the soil this year each box got one wheel barrow full of homemade compost, a bag of cow manure, a bag of mushroom compost, and a bag of sta-green tree and shrub garden soil (from lowes) ... the sta-green soil had some fertilizer in it, so it could be possible they were getting N from that all season, but now it's starting to dry up.
I was thinking of trying some blood meal or superthrive and see how they react ... it's definitely not airflow, these are all wide open on the screen ... one more observation is that growth seems to have stalled over the last week or two... normally I would expect them to be stretching like crazy by now, but they seem to be inching along ... heres a few more pics from this morning
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Black-Thumb
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My guess would be potassium deficiency due to a PH issue.
That specific deficiency is known to cause yellowing on older leaves toward the bottom, and cause brown spots that spread from the edges in. Usually because the PH is out of whack just enough to stop the potassium uptake, or because it is just lacking potassium in its diet for whatever reason.
I'd start by PH'ing the soil and your water and see if that fixes it. If you arent in the sweet spot you'll have your answer.
The same symptoms can be caused by stress/heat/root issues, but for where the problem is starting and how localized it is, potassium due to diet or PH would be my first guess.
stealthfader508
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Thx... I've never tested PH before ... where can I get something to test it?
Black-Thumb
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As far as the slowed growth, that could link back to the same PH issue. It may have just manifested itself visually as a potassium deficiency first.
If drainage is good and you are having good wet/dry cycles, I'd say its probably not the roots (I'm assuming your drainage is good). Especially since you are in the ground. So that's good news.
Also, it's been hot all summer so I dont think it's the heat all of a sudden bothering/stressing them. Your airflow isnt a problem since they are in the wide open and trained/defoled so well, so rust mold or anything like that is probably out. Again, good news.
For me that leaves the same answer. Check PH on soil and water, then we can come up with a plan.
Black-Thumb
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Lowes, amazon, Home Depot...they should all have decent soil PH testers. Let me look real quick and try to figure out the best one. I think they are relatively inexpensive. 1 sec...
stealthfader508
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never mind.. i found it at lowes ... i'll start there
Black-Thumb
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It looks like this one is made by one company and then sold thru a bunch of resellers under different names. Anywhere from $10-$15. All good reviews. Lowes has it, Home Depot also.
There are also some test kits that are cheap that supposedly work great.
Then a ph pen or the colored bottles to test your water. That might have to come from amazon. So in the meantime I'd switch to RO water until you have a reliable way to test the water you are using.
There are also some test kits that are cheap that supposedly work great.
Then a ph pen or the colored bottles to test your water. That might have to come from amazon. So in the meantime I'd switch to RO water until you have a reliable way to test the water you are using.
Black-Thumb
Well-Known Member
Cool. The soil will be easy to test with that thing, but the water can be tricky. Ive used 3 different methods on the same water and got 3 different results.
The most reliable seem to be either a medium-expensive pen, or the drops. The drops you can get at the hydro store for $15. Comes with a bottle of phUp and phDown, and a test solution. Those work great. Or...use your pool tester if you have one.
I've had terrible luck with the strips.
stealthfader508
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thx man .. ill start there and see what the PH is coming in at before adding anything
Black-Thumb
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Perfect. Once you know that (the soil and water ph), we should all be able to focus in on what's happening.
stealthfader508
Well-Known Member
I actually just found this in the garage.. i've had it for years and never used it .. I'll try using it now and see whats up
