What deficiency is this?

What's wrong with this plant? She just showed preflowers about a week or two ago and now she's having all sorts of problems.

Her stems are turning dark purple, leaves have yellow edges and then crisp and fall off, the stems feel weak and bend like rubber. Also she's my tallest plant and is about 3" away from my lights and the others are way far behind in height and I have nothing lying around to prop them up on that would safely support the weight of the 5 gallon bucket+plant.

I just pruned her about a week ago to remove all the clustered inner growth that wasn't getting light. I probably snipped about a hundred branches.

I'm in 24/0 lighting right now and was gonna switch to 12/12 today but is that bad and will it stress the plant even more?

Details are: 760 W Quantum T5 lights, standalone BubbleBucket DWC, Advanced Nutrients Grow/Micro/Bloom 1.40 tsp per gallon (5 tsp each for the 3.5 gallon res), pH is about 5.7, temps are low to mid 70s, and RH is between 40% and 50%.

thats a major drawback to hydro nute burn. get it back on a nice low feeding program and it should work itself out.

What are your ppm's?

^^^ Agree, looks like other pics of nute burn I've seen. Maybe you're pushing their nutes too hard? =)

No idea on the ppms but I measured out exactly 3.5 gallons of water and measured exactly according to the bottle when I added nutes so it should be within range.

jesus of Cannabis said:

thats a major drawback to hydro nute burn.

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Uh what?????


Pretty sure spots aren't an indicator of nutrient burn. Google "marijuana nutrient burn" the pictures won't look anything like your plant.

Are you adding any Cal/Mag?

brownbearclan said:

^^^ Agree, looks like other pics of nute burn I've seen. Maybe you're pushing their nutes too hard? =)

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I stopped using additives since I don't have a PPM meter. Before that I was adding the Advanced Nutes G/M/B, SilicaBlast, AquaShield, Cal-Mag, and SuperThrive. Yesterday I changed the res and added the AN Nutes only and according to the bottle specs. I can't tell if she's better or worse since then but should I flush with FloraKleen?

yeah i was using cal-mag, just 1 tsp for the entire bucket but stopped as of yesterday when i quit the additives. cal-mag has nitrogen in it so without the ppm meter i might have overdosed.

She doesn't look overdosed to me

i was gonna switch to 12/12 yesterday but decided not to because it might stress her more. how long should i prob wait and what indications will there be that the plant is getting better? shes making new healthy leaves and has grown taller but still has dark purple and weak stems./

nut burn .. my plant got the same thing and i flushed it and its ok now..... dameged older growth wont heal but the new growth will come back looking great and i learned on rollitup that 24/7 light is not good... just to be safe i dont do that

pokesmotallday1 said:

I stopped using additives since I don't have a PPM meter. Before that I was adding the Advanced Nutes G/M/B, SilicaBlast, AquaShield, Cal-Mag, and SuperThrive. Yesterday I changed the res and added the AN Nutes only and according to the bottle specs. I can't tell if she's better or worse since then but should I flush with FloraKleen?

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You shouldn't use the specs on the bottle. Use 1/4 strength and then slowly increase the nutes.

yeah next time ill do 18/6 but i dont wanna switch now cause it might stress it into hermie

is everyone sure its overfeeding because i was thinking N, P, or K deficiency???

im pretty sure that nobody answered u until almost a year later. thats fukd