Not sure what def this is.

I have been having a problem with this one strain only, its from TGA subcool called space dawg. about 4 weeks into flower these girls will start turning yellow from the bottom and going up leaving the top leaves a hint of green the leaves curl up and die, stalks turn red and ive been flushing with phd water at 6.8 im using pro-mix but it doesnt seem to help. im at a loss.

They start like this:


End Like this: The entire plant is yellow and most of all the lower older leaves look like this and fall off.

Most likely nitrogen deficiency. What nutrients are you using in that promix? What is the NPK?

Space Dawg is a nice plant from TGA, you will love it

Ive had it and love it, im using the entire line up of general organics. When i add nitrogen it does not do anything my only guess is something to do with Molybdenum because it mocks nitrogen problems.

Doesn't look like curling up, looks like curling down. Have you tried to drop the ph down, on that strain only, to 6.5? Sometimes after the stretch, in flower, some plants don't need as much water too.

6.5 made it progress faster. leaves curl up and down lol

N deficiency. She's probably just a hungry girl.

Can you post a whole plant pic and tell us what yer feedin?

i must of had too low of a ph at one time because i was adding natures nectar 5-0-0 and nothing was happening usually one dose will get any plant green. but i have never seen N def give brown patches like that.

Get some fresh air to it. Sounds simple, but what is happening is that it is co2 starved. It's eating itself...ask me how I know...

i run 1500 ppm for 15 mins every hour, no way. Its with this strain only i have half a dozen other strains in the same stage just green as can be.

BigTexan said:

I have been having a problem with this one strain only, its from TGA subcool called space dawg. about 4 weeks into flower these girls will start turning yellow from the bottom and going up leaving the top leaves a hint of green the leaves curl up and die, stalks turn red and ive been flushing with phd water at 6.8 im using pro-mix but it doesnt seem to help. im at a loss.

They start like this:
View attachment 3323264

End Like this: The entire plant is yellow and most of all the lower older leaves look like this and fall off.
View attachment 3323265

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I just ran that same strain, and i had similar issue. I found that its a potassium deficiency those r some heavy feeders. 100% potassium.. Some of them turn like golden brown on leaf edges from tips moving inwards til they get crinkled and dry up and fall off? Starts from bottom leaves and will work its way up. U need to increase your nutrients and make sure u have good run off and not building up salts in the containers. Bol

pk_boosted2 said:

I just ran that same strain, and i had similar issue. I found that its a potassium deficiency those r some heavy feeders. 100% potassium.. Some of them turn like golden brown on leaf edges from tips moving inwards til they get crinkled and dry up and fall off? Starts from bottom leaves and will work its way up. U need to increase your nutrients and make sure u have good run off and not building up salts in the containers. Bol

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Exact same, it was a toss up between N or P just couldnt figure it out.

BigTexan said:

Exact same, it was a toss up between N or P just couldnt figure it out.

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Hey man im really confused u said ur running promix but ur feeding at 1500 ppm every 15 min?? At what period of bloom are u in and what nutrients are u using? This is very high ppm depending on nutrients IMO. Especially if ur running drain to waste irrigation and feeding throughout the day.

I would imagine if u leached the medium with regular water and collected ur run off it would be very high in ppm count? Did u try checking that yet?

Also ph of 6.8 in promix is very high. If ur running a drain to waste by time the 6.8 solution gets to ur pots after sittin for awhile or being aerated i bet if u checked ur reservoir the ph would be over 7.0 after an hour or so of oxygen being pumped into it.

Target range for drain to waste using promix i would be in the 6.0-6.3 range for best results. Im thinking ur salt built up in those containers causing the ph to get to high and is locking out your nutrients on that strain.

If ur in mid floeer than 1500 ppm may be okay on some huge plants but i dont even get that high ever. When ur feeding everyday u really shudnt need to be over maybe 1100-1200 even using organics. Once again this is IMO.

Looks like u got a few issues if its effecting entire plant: nitrogen lockout,mootassium and phosphorus issue now that i see the discoloring between veins looks purple/brownish color. U got any other pics i can see?

Everythings good now, and no the 1500 was co2 not nutes god no, lol i feed every 5 days and 2 of those days are just fresh phd water. she was just wanting more i just have to give them their own bucket because they eat way more than my indicas.

BigTexan said:

Everythings good now, and no the 1500 was co2 not nutes god no, lol i feed every 5 days and 2 of those days are just fresh phd water. she was just wanting more i just have to give them their own bucket because they eat way more than my indicas.

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Oh ok cool. Yeah when i ran those they were hounds. It was like they couldnt get enough nutrients they drove me nuts lol. Really fruity smelly ass buds though.

Idk if i got a bad batch of seeds or not i only ran 5 to try n get best phenos but none of them really produced like they claimed idk if it was the seeds i got or that strain overall i wasnt happy w yield at all on the few i ran, ur thoughts?

They had small flowers, nice n compact but not big at all, but smelled really good

Got close to a pound off one before these girls the top colas were decent sized, really strong immediate head high great pain reliever.

BigTexan said:

Got close to a pound off one before these girls the top colas were decent sized, really strong immediate head high great pain reliever.

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Oh 1500 ppm of co2 i didnt see that thought u meant nutrient level i was like wtf haha ok no doubt.

I think important thing for anyone reading or doesnt know about using co2 induction is that if u havent dialed in ur grow without using co2 enrichment. When u add it, it will only lead to problems especially deficiencies. Since co2 helps boost plants metabolism, u also need remember to increase the nutrients ppm level accordingly. As a general rule of thumb i always try to maintain the same nutrient ppm level as the co2 enrichment level during various growth stages.

Beginning of bloom usually feeding 1000 ppm i keep co2 around 1000 ppm.
As peak bloom approached usually weeks 4-6(7) and i increase nutrients to 1200-1300 i raise the co2 ppm to 1200-1300.. And then back down as i decrease nutrients and get into the maturation and ripening stages of bloom.

I find this to be very important for anyone using co2 enrichment and understanding the needs of plants and metabolism as its demands increase and co2 is increased a plant is on steroids, as if u were at the gym working out to maximum levels u would need to intake more calories and supplements, its same type of idea

Glad u solved the problem! BOL happy harvests brah, cheers.

when you have 20 plants in one room they like to gobble up the co2, ppm levels do not correspond with my co2 levels as it stays 1500 year round. i start from 800pmand go up to 1800 at times depending on what they need. i only have 3 space dawgs everything else is fine. Little suckers just want to eat my wallet.