two weeks into flower and yellow spots?? PLease help asap with pictures

jackm420

jackm420

Active Member
Hey everyone I have 3 females going under a 400 watt air cooled tube, 4ft high output 4 bulb t5 and a t8 for extra lighting. I have had a flawless grow till a couple days ago I noticed my biggest plant (dutch passion mazar) had some yellow spots. I go light on feedings 1/2 strength following foxfarm feeding schedule. I was looking at possible deficiencies but from what I could tell she is just taking more water as I checked today with my digital probe it said DRY+ for the soil. (foxfarm ocean forest soil). My other 2 girls 1 more dutch passion mazar and 1 akorn snowbud are just fine and I don't do anything different to them other than they are a bit smaller and I water a little less on the volume of water. As you can see the yellow in the pictures a couple leaves looked dried up also...is it under 1216131026.jpg1216131026a.jpg1216131026c.jpgwatering?? It's in a 5 gallon smart pot and it gets a gallon of water twice a week one of which is a feeding. Thank you o and she is about 26" tall and 14 days into flower and a few hairs look red?
 
jackm420

jackm420

Active Member
I'll check now. I though all foxfarm soil and nutes were ph balances i always ph my water and when feeding i make sure it's in the ranger before the girls get it.. what's the best way you recommend to check ph?
 
jackm420

jackm420

Active Member
My digital all in one probe says 6.5 half way down pot 6.0 on bottom of soil for ph ($30 probe always been good to me so far anyways)
 
jackm420

jackm420

Active Member
My digital all in one probe says 6.5 half way down pot 6.0 on bottom of soil for ph ($30 probe always been good to me so far anyways)
 
*BUDS

*BUDS

Well-Known Member
Under fed and moisture stressed. I have plants about this size that take 2 litres a day of water mixed with near full strength Canna flores.

This stage (week 2-4 of flowering) is when the plant, if healthy consumes the most water and food, particularly P.
 
smegpot

smegpot

Well-Known Member
The only time I get leaves like the one you have (folded under except 1/3 tip) is when I have some sort of PH fluctuation. That leaf is history, its just going to get crispy and fall off. If your PH is reading 6.5-6.0 then there is not much you can do, your plant just hit a pocket of "??". Keep an eye on new growth or additional yellowing.

I would try splitting your waterings into smaller feedings (unless I read wrong), instead of 2 waters a week try 4. When do you PH? Do you let it sit for at least 2 hours before you water after you PH? I found I had issues early on when I started because I didn't let the ph set before I watered and would get odd deficiencies like this seemingly out of the blue.
 
jackm420

jackm420

Active Member
i appreciate it everyone wondering if it's an underfeeding issue i've been feeding at 1/2 to 3/4 strength nutes i'll have to up it
 
jackm420

jackm420

Active Member
what's really weird is that this issue (some yellowing couple rust color spots) just appeared a few days ago but all the leaves and growth on the top 1/3 of the plant is just fine. It's just some hit or miss areas towards the middle and down..
 
smegpot

smegpot

Well-Known Member
jackm420 said:
what's really weird is that this issue (some yellowing couple rust color spots) just appeared a few days ago but all the leaves and growth on the top 1/3 of the plant is just fine. It's just some hit or miss areas towards the middle and down..
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Then I wouldn't worry about it, it happens sometimes. I would move up to full strength and just carry on. I usually go full strength right out of gate on all my plants, unless I see a problem. Rather than creeping the mixture up to full strength.

I guess you get a little bit more carte blanch after a few times, but I try to push the plants early on to see what kind of a bush I'm dealing with, at least with new strains. If its too hot, then I lower it. I don't think I have ever "lost a plant" or even severely effected my yield to much by pushing the plant and having to dial things back a bit.

I hand water and make my mixes every other day though so I guess you have to be a little bit more involved than mixing everything in a huge res once a week.
 
smegpot

smegpot

Well-Known Member
Here is something interesting I found in a chat room just now concerning odd ph swings:

"the article mentions how the "drainage" layer moves the PWT up in the container. you lose the additional volume but it also should be noted that it creates a barrier to airflow. any roots that have gotten past the pwt during "dry" periods will become anaerobic.

water will transport gases due to partial pressures but at a much slower rate than air. i think i remember 15 times slower.

every time you water you create this anaerobic condition temporarily. there is usually a large ph drop associated with this condition. radical ph swings create all kinds of unwanted changes in your solution, such as precipitation and imbalances in the ratio of nutrient uptake. if you develop pythium the ph can go down to 3.5-4.0."
 
B

Bear Country

Well-Known Member
jackm420 said:
thanks for all the comments everyone i guess ill wait and see what happens
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I actually disagree with some of these posts. I WOULD NOT increase the amount of nutes you are feeding. I would do exactly the opposite of that. The other two plants are looking good and doing fine...so you say...its just this one that is unhappy. I actually see nute burn on the best picture you posted....nute burn can be hit and miss as you describe and the leaves can curl inwards, upwards, twist...and of course burn and dry up. Thats just where the plant took up the heaviest doses of feeding. Perhaps that this gal is just a bit more sensitive to nutes then the other two. I would reduce the amount of nutes you are feeding her. Try that first because if you went to full strength FOX FARM NUTES...I can almost guarentee you that you will kill her with nute burn. Fox Farm nutes run super hot...I stopped using them because it was to hard to regulate what each plant liked. If you reduce her feeding...you can always gradually increase...if you go full strength...there is no going back if its to hot. Okie dokie...just one Bear's opinion!!
 
tikitoker

tikitoker

Active Member
Bear Country said:
I actually disagree with some of these posts. I WOULD NOT increase the amount of nutes you are feeding. I would do exactly the opposite of that. The other two plants are looking good and doing fine...so you say...its just this one that is unhappy. I actually see nute burn on the best picture you posted....nute burn can be hit and miss as you describe and the leaves can curl inwards, upwards, twist...and of course burn and dry up. Thats just where the plant took up the heaviest doses of feeding. Perhaps that this gal is just a bit more sensitive to nutes then the other two. I would reduce the amount of nutes you are feeding her. Try that first because if you went to full strength FOX FARM NUTES...I can almost guarentee you that you will kill her with nute burn. Fox Farm nutes run super hot...I stopped using them because it was to hard to regulate what each plant liked. If you reduce her feeding...you can always gradually increase...if you go full strength...there is no going back if its to hot. Okie dokie...just one Bear's opinion!!
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SOLID! Follow this advise
 
crispypb840

crispypb840

Active Member
I concur. It isn't a lack of feeding. If you are only watering once in between feedings you can get salt build up witch will get toxic and cause leaf burn and lockout. This is why you have your issue IMA. Water twice in between feedings and make sure you are getting a good bit of run off (1/2 gal.). This will flush your soil of unwanted nutrients. Your plant will only use so much nutrients. Anything extra will be remnant. In your shoes I wouldn't feed for at least 3 waterings to let her use what is already in soil.
tikitoker said:
SOLID! Follow this advise
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