Guide for Diagnosing Plant Problems

Roger A. Shrubber

Roger A. Shrubber

Well-Known Member
you're still overfeeding N....and you still have a problem that's making it look like you have a slight mag deficiency....which i think is from your ph being off...putting a plant into flower usually will make it more vigorous, but if you don't solve the problem before you put it into flower, your quality and quantity will both suffer......
 
eclipse01

eclipse01

Member
Roger A. Shrubber said:
you're still overfeeding N....and you still have a problem that's making it look like you have a slight mag deficiency....which i think is from your ph being off...putting a plant into flower usually will make it more vigorous, but if you don't solve the problem before you put it into flower, your quality and quantity will both suffer......
Click to expand...
I know I experienced the claw with my last grow but bud still smoked fantastic leaves look alot better today so much happier looking
 
Roger A. Shrubber

Roger A. Shrubber

Well-Known Member
Daskalot said:
Hey,
Anybody has an idea what this can be? The plant looks healthy but this happend to it and few others lately...
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hard to tell with the hps light, kind of looks like your ph was badly off when you watered last. take some pics in normal light, and tell us what medium, what nutes and how much, the ph, temps, rh, what lights you use...and anything else that seems like it might be relevant....the more you can tell us, the better chance we have of telling you what's wrong
 
KarmaKav

KarmaKav

Member
My plant has leaves at the bottom turning brown, crispy and falling off. The leaves near the top are super green and developing more. Is that normal?
 
Roger A. Shrubber

Roger A. Shrubber

Well-Known Member
KarmaKav said:
My plant has leaves at the bottom turning brown, crispy and falling off. The leaves near the top are super green and developing more. Is that normal?
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probably not...some pics on the plant would help a lot. in normal light, at least one full plant pic, then closeups of the effected leaves.
 
eastcoastmo

eastcoastmo

Well-Known Member
Hi guys,
I've been growing for over 20 years and up until 12 mths ago, had no issues and was able to identify issues with my plants.

Last year I moved interstate and got my little tent up and running again, I have had nothing but trouble since, my seeds sprout, grow for a few weeks and then go yellow, this is the third lot of seeds and I really can't lose these ones so I'm hoping some expertise from you guys may help! Details of the grow are below as well as pics.

Lighting: Platinum P300 LED grow light (on veg mode only at the moment- about 85w) and a diy Vero 29 cob with solskin strips on either side, pushes 98w.

Tent: 60cm x 60xm x 1.6m
Air movement: 6 inch inline exhaust fan
Temps: lights on is 23-25 degrees Celsius, lights off, 15-17 degrees.
Soil: purchased organic tomato soil that has manure, blood n bone and some other goodies, my tomatoes love it! It may be that it needs Perlite or vermiculite to make it separated.
Additives: Sprinkled some gypsum on top and they have been given great white mycos
Watering: every 4-5 days on average and I soak the medium then let it dry out.
Soil pH is 6.8.
Tap water is 7.6. I haven't tested runoff as yet but will do so tomorrow when I get a new pH pen.

So I put the issues down to overwatering as looking at the seedlings, they curl down and are yellowing. I'm now wondering if it could be my tap water pH being too high but my soil pH is staying the same...I'm stumped!

Some pics, these seedlings are about 3 weeks old so are definitely stunted. The only dark green one in the first pic popped up 2 days ago. Thanks guys!
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Roger A. Shrubber

Roger A. Shrubber

Well-Known Member
eastcoastmo said:
Hi guys,
I've been growing for over 20 years and up until 12 mths ago, had no issues and was able to identify issues with my plants.

Last year I moved interstate and got my little tent up and running again, I have had nothing but trouble since, my seeds sprout, grow for a few weeks and then go yellow, this is the third lot of seeds and I really can't lose these ones so I'm hoping some expertise from you guys may help! Details of the grow are below as well as pics.

Lighting: Platinum P300 LED grow light (on veg mode only at the moment- about 85w) and a diy Vero 29 cob with solskin strips on either side, pushes 98w.

Tent: 60cm x 60xm x 1.6m
Air movement: 6 inch inline exhaust fan
Temps: lights on is 23-25 degrees Celsius, lights off, 15-17 degrees.
Soil: purchased organic tomato soil that has manure, blood n bone and some other goodies, my tomatoes love it! It may be that it needs Perlite or vermiculite to make it separated.
Additives: Sprinkled some gypsum on top and they have been given great white mycos
Watering: every 4-5 days on average and I soak the medium then let it dry out.
Soil pH is 6.8.
Tap water is 7.6. I haven't tested runoff as yet but will do so tomorrow when I get a new pH pen.

So I put the issues down to overwatering as looking at the seedlings, they curl down and are yellowing. I'm now wondering if it could be my tap water pH being too high but my soil pH is staying the same...I'm stumped!

Some pics, these seedlings are about 3 weeks old so are definitely stunted. The only dark green one in the first pic popped up 2 days ago. Thanks guys!
View attachment 4283977
View attachment 4283978
View attachment 4283979
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7.6 is way too high, that may or may not be the main problem, but it definitely is A problem.
when you are growing in soil, the ph of the soil pretty much takes care of itself if you ph your nutes to the right range.
i'd get rid of the peat on top of your pots as well, the faster they dry out, the more you can feed
 
eastcoastmo

eastcoastmo

Well-Known Member
Roger A. Shrubber said:
7.6 is way too high, that may or may not be the main problem, but it definitely is A problem.
when you are growing in soil, the ph of the soil pretty much takes care of itself if you ph your nutes to the right range.
i'd get rid of the peat on top of your pots as well, the faster they dry out, the more you can feed
Click to expand...
Thanks for the reply mate, I appreciate it.

I'll be checking the pH of the water and runoff today but last I checked it was 7.6.

I should've mentioned that I run organic so use compost teas but haven't used any yet as they are too young, I assumed the tomato soil would have enough food to last them a while, maybe they need feeding...
The peat hadn't made any difference to how often I watered, I was hoping it would help with lowering the pH a bit. I might get some Lucerne instead to use as a mulch if you think the peat is an issue?
Thanks mate!
 
eastcoastmo

eastcoastmo

Well-Known Member
Roger A. Shrubber said:
7.6 is way too high, that may or may not be the main problem, but it definitely is A problem.
when you are growing in soil, the ph of the soil pretty much takes care of itself if you ph your nutes to the right range.
i'd get rid of the peat on top of your pots as well, the faster they dry out, the more you can feed
Click to expand...
So I got a new pH pen, tested the water and the runoff. Water tested at 7.0 and the runoff tested at 6.9 so doubtful it's a pH problem. I took the plants out of the pots, put some coco and vermiculite in and put the plant back in, see if they go better with watering. Otherwise, I think I'll lose this lot too, unfortunately!
 
Roger A. Shrubber

Roger A. Shrubber

Well-Known Member
eastcoastmo said:
So I got a new pH pen, tested the water and the runoff. Water tested at 7.0 and the runoff tested at 6.9 so doubtful it's a pH problem. I took the plants out of the pots, put some coco and vermiculite in and put the plant back in, see if they go better with watering. Otherwise, I think I'll lose this lot too, unfortunately!
Click to expand...
p.h. for coco should be in the area of 5.8....each point that its off is a factor of 10...so ph 7.0 is 12 times as alkaline as 5.8....
small differences in ph can make huge differences to your plants. 7.0 is better than 7.6, but it's still way too high

and just a question...what does it mean that your runoff ph is 6.9? what does that tell you? what useful information are you getting from that runoff ph data?
 
eastcoastmo

eastcoastmo

Well-Known Member
Roger A. Shrubber said:
p.h. for coco should be in the area of 5.8....each point that its off is a factor of 10...so ph 7.0 is 12 times as alkaline as 5.8....
small differences in ph can make huge differences to your plants. 7.0 is better than 7.6, but it's still way too high

and just a question...what does it mean that your runoff ph is 6.9? what does that tell you? what useful information are you getting from that runoff ph data?
Click to expand...
I agree that the pH for coco should be around 5.8 but what about if it's mixed with organic soil? I only put like a cm of the coco/vermiculite mix at the bottom of the pot, the rest is organic soil.
The runoff test told me that the pH was only moving one point compared to what was coming out of the tap, it wasn't swinging too much for soil. Should it be telling me something different?
 
Mysturis420

Mysturis420

Well-Known Member
These are in my flower as you can tell kinda light on color but mostly im concerned about the drooping these are also in coco and as you can see not all plants are effected and I've watered them the same again any help would be appreciated
4by8 tent
3x hlg 550s
Temps at 80 day 70 night
Humidity 45 percent
Watering once a day 5.5 to .6.0 ph going in.high ph coming out around 7 to 7.5 even after a huge flushing I don't understand it using vegamatrix nutrients
 

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Mechanicalbuds

Mechanicalbuds

Active Member
Shit, y'alls plants don't look THAT bad. I could show ya some really bad leaves. I'm trying to work threw it, slowly getting better. Start with GOOD water. Most important. WATER QUALITY!
 
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