Help Identifying Issues

I'm having the same problems in 3 different rez using which are using all different nutes (so that I could figure out which work). I'm new, 2nd grow, and my first grow did nearly the same.

Supercloset Trinity "Superponics" (DWC & bubbleponics: Super Closet )


12/12
600 watt hps
RO 10-20
Temp - 72'-82'
RH 20-27%
H20 - 66'-72'
ph - 5.6-6.3 (balanced daily at same time)
Rapid Rooters
Clay
Clones
Feeding for 15 minutes every 3 hours during lights on only.

I have several different issues that keep re-occurring.

Necrosis spotting:
sometimes starting at the tips
sometimes starting at the base of the blade where the stem meets

white spots on the veins where the blade meets the stem, slight red stem on underside at same spot, slight red where the leaf stem meets the main stem or stalk. they often look like cuts. No pests, no foul treatment or bruises.

burned tips upward

slight mottling

sometimes clawing down and praying up leaves on the same fan leaf

papery feeling

2 chlorosis (white) spots, no way anything got on them (no pic)

the flower pics are 45 days into flower with what I was thinking was a K deficiency, but now possible molybendum??

I'm now using Technaflora on my girls that are 45 days into flower (the pics that look badly burned). Can't say they are getting better, but the don't feel so papery, bit more moist, but not like they should. I got my ppm up to 740, but backed down because my ph was going down low while my ppm was either raising quite a bit or increasing a bit.

My SOG which is 24 days into flower has been getting ONLY Dyna-Gro Foliage Pro 9-3-6. I lollipopped them. They look great, but I am beginning to see the beginning of the same issues from the ones mentioned above and also my first grow. The pics that have just leaves with a white background are from that grow, the healthier grow. But, I saw this with the others and would like to stop it before it progresses.

Please take a look at my pics and tell me what you think. Sorry about the color, lights are on so it is very yellow, but you can see the obvious deficiency.

Any helpful input would be appreciated.

Thanks

From all the data you gave us the more critical I see is RH: 20-27%, your plants are doing excellent to be growing in such a extreme condition. See the less moisture in the air the more the plant has to transpire to keep her humidity cycle. So if you now have warm temperatures (82°), low humidity (20%), and fast transpiration rates you may find your plants are using a little too much fertilizer a little too quickly. Leaf tip burn is usually a sign of this. Under these circumstances you can feed your plants with a weaker nutrient solution and I'd advice you double the flooding cycles and spray your plants at night and before the lights go on.

i agree with maps... your humidity is too low... but i would spray when lights come on .. water droplets act like magnifying glass and might burn your leaves creating spots.. other then that maps nailed it

imo i would NOT spray w lights on.

pics 1&2- low rh.

pic 2- possible cal def. not too bad

pics 7-9 - nute burn

Thanks everyone. I'm glad to hear its likely the humidity. Live in AZ, so that's always a problem. Thought it wouldn't matter if it was low during flower. Easy enough to correct.

Thanks.

Isisyogi said:

Thanks everyone. I'm glad to hear its likely the humidity. Live in AZ, so that's always a problem. Thought it wouldn't matter if it was low during flower. Easy enough to correct.

Thanks.

Click to expand...

i live az too! and trust me i have dealt w the low humidity too. but i guess its better than high humidity. last crop i ran a humidifier up until mid flower. this crop i only ran it for the 1st week of flower when i noticed some leaf taco. after that i havent ran it since and theyre doin fine despite the rh average of 35%. u will really need a humidifier for vegging under hid lights especially when the plants are small.

I added a humidifier and CO2 and dropped my ppm back down to 540ish in the past 24 hours, so we'll see how that goes.

Changed to feed every 2 hours for 15 mins, lowered the ppm, added humidifier, added CO2. The stats in that tent seem to be stabilizing. Happy, happy. Thanks for the help.

My Trinity flower side is progressing with its symptoms. Can't address it til Monday. No pics til then either. I recently lollipopped them, so I don't know if they are considered lower leaves or mid leaves. If all the branches were still on, they would be on the border of both. During the weekends, the cabinet gets hotter because I can't leave it open due to security. Weekdays it doesn't run as hot. I'm installing a window AC shortly to conquer the problem with both flower and veg cabs. Outside temp hasn't reached 80' yet, but the slight swing of 5-10' upward has made an incredible difference! Gotta prep for the 120s of summer, ugh!

Lower leaves:
Mottling, mostly starts at mid tip area
Necrosis spotting, mostly starts at mid tip, dances across leaf
Mottling, yellowing, necrosis, green veins, starts at tip
Slight papery feel
Slight twisted growth
Slight necrosis at margins
Few red stems/petioles (mostly on effected leaves)
Couple of leaves dropped & died, looks like mag def

Upper leaves:
For the most part, looks good and healthy
New growth is a bit less green, starts at leaf base where stem meets leaf
Few leaves have a slight crooked appearance at mid tip area.
Slight redding in between veins on few, looks lightly metallic sheen,, green veins
Necrosis spots dancing across green leaf on mid upper lleaves
Mottling entire leaf
Yellowing between veins mid leaf
Necrosis at tip
Slight drooping (but it was hot yesterday)

I'll post pics later. Had some time, thought I'd knock out the descriptions now.


My phone keeps changing leaf to lead, forgive any typos please.

Thanks for looking.

apbx720 said:

i live az too! and trust me i have dealt w the low humidity too. but i guess its better than high humidity. last crop i ran a humidifier up until mid flower. this crop i only ran it for the 1st week of flower when i noticed some leaf taco. after that i havent ran it since and theyre doin fine despite the rh average of 35%. u will really need a humidifier for vegging under hid lights especially when the plants are small.

Click to expand...

Its winter here atm so I'm dealing with the same lack of rh too.