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yellowing leaves on newly flowering plant autoflower help

sheed357

Member
Hi guys I'm like week 2 into flowering my mainly saliva nordika autoflower and the leaves are starting to turn yellow is this normal or do I need to feed or check my ph?
 

sheed357

Member
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Dan Ultra

New Member
Well, you should ALWAYS be checking your pH. It looks like you have some pH lockout, since the new growth is yellow as well, meaning you are out of the correct pH range to absorb nutrients. What has your feeding/ watering schedule been like? A few other things I will mention, that plant looks too big for that pot and might have been stunted because of that. Especially with the soils a few inches from the top, fill it up next time. Also, that string is too thin and might decapitate your plant as it stretches. I would try and switch those out asap!

So to recap,
Check pH often and adjust as needed
Fill the pot with soil, consider a bigger pot next time
Use gardening wire, not string to LST
 

sheed357

Member
Thanks I kind of thought the string was too small and I'll be purchasing a ph kit today once I get off. I filled the pot to the top when I first started the dirt just compacted together it's a autoflower and it's my first test run is why I strated off in that small pot plus limited space but thanks very much for your reply I'm very grateful
 

sheed357

Member
One question when I check the ph do I check the ph of the water that I feed or the ph of the soil drainage or both? I'm guessing I adjust the ph of the water that I feed to adjust the ph of the soil
 

Dan Ultra

New Member
You need to flush out the soil to get it correctly pH'd again. So put 3-5 times the amount of water that the pot can hold. So get what ever water source you use, use pH up or down to get it to 6.5 and then flush the soil. The idea here is to rid the soil of salts and build ups and reset the pH to a correct range. I check the pH of the runoff at the middle and the end to make sure it's sitting correctly.
 

sheed357

Member
Will do! I was thinking should I at least pull the plant and put fresh soil at the botTom of the pot a larger pot at this point won't work do to the size of the box
 

Kotter

New Member
I agree with the flush, get the ph correct. Then feed 1/4 the nukes. Resent experience with auto's. I made a lot of mistakes PH was one that had to be corrected before the other could be addressed. Auto don't like a lot of nutriunts.
 

Kotter

New Member
PH the water going in to 5.8 to 6.0 I shoot for 5.8. PH the water coming out. It should be 6.0 to 6.5, I shoot for somewhere in the middle 6.2 As long as you keep the medium between 5.5 and 6.5 you should be ok. 5.5 just seems a little low to me . that why my input PH of 5.8
 

sheed357

Member
Thanks I got the ph at 6.0 and I've been feeding them leas than 1/4 of the recommended amount lol but it seems to have bounced back and is doing great
 

TheStudent

New Member

It appears you have a phosphorous deficiency unless you were experiencing lock out, otherwise you could improve that growth and flower formation by supplementing phosphorous. Yellowing like that can also occur from light bleaching. A friend had similar issues the other day from light bleaching, over watering, and phosphorous deficiency. I'm happy to report that all have been corrected.
 

TheStudent

New Member
Light bleaching can be caused by a grow light being too close to the plant, a grow light that was cheaply made or reaching the end of it's life span resulting in emission of a poor spectrum, or an indoor plant being moved outdoors. All result from oxidative stress induced in the plant by excess reactive oxygen species, typically oxygen radicals, resulting from elevated rates of photosynthesis.

-Student

Reference:
Non-Photochemical Quenching. A Response to Excess Light Energy
 

sheed357

Member
It's water mixed with a sprinkle of foxfarm big bloom it's dry as hell in the box so I mist it every so often I have a fan blowing in and one pulling air out so the plant drys in about 2 minutes or so Ive read different point of views on misting so I figured what the hell lol its been working so far once the buds thicken up a little I'll stop thouhh
 
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