Is this cannabalization or nute issue

[B_dub]

I'm at week 8 w this auto. Everything has gone pretty good. Got a touch of nute burn and have backed off to 1/4 strength nutes from half and gone from every other watering to every 3 or 4 after I flushed it a bit (just double watered it). Now I have the leaves near the buds turning a bit yellow. Wondering if it's cannabalization or another issue. Leaning toward cannabalization just due to nothing else crazy taking place. Any ideas? Tia.

 

[MassMom]

Hi hon. I am no expert, but the leaves do start to get funky near the end of the grow, and start the dying process. Maybe that is it?
I will let more knowlegable people give you advice, but....I wanted to just pop in and say hello

XOXO
Mom

 

[B_dub]

That is my hope! I really don't think it would be a deficiency just with everything I've been doing but as a first time grower, I'm second guessing it lol. Thx

 

[Bruce Campbell]

Since it's interveinal, it seems a bit more like Mg deficiency than end-of-life low N - but I'm just a newb...

There's a recent thread here that shows it a bit worse. You can add some epsom salts in with your feed / water, or do a foliar application.

 

[B_dub]

Guess only us newbs check in over here lmao. Need a vet to confirm. I haven't done any calcium or magnesium so maybe ur right. I have only used the tiger bloom, big bloom, and earthworm castings. Can any vets confirm?!

 

[Suki]

Guess only us newbs check in over here lmao. Need a vet to confirm. I haven't done any calcium or magnesium so maybe ur right. I have only used the tiger bloom, big bloom, and earthworm castings. Can any vets confirm?!

Nah not necessarily. Tag in @Mañ'O'Green for nute questions. You'll get more answers on this kind of stuff posting in the infirmary.

 

[Mañ'O'Green]

It might be something so fill out the form the best you can. I would be interested in your starting water source and PPM.

Please fill in this form: (copy and paste part is below, this first one tell what specifically to include)

-Problem: (brief description)
-Medium/grow method: soil; soilless-- coco, or peat based like Promix, etc. (please provide the actual product name); DWC, NFT, etc.
-Feed and supplements used: include brand, dosage/strength, frequency of feeding and watering (alone); method-- by hand, drippers, rercirc' or drain-to-waste,... N-P-K #'s too if you can!
-Water source: RO/DI; tap- dechlorinated-?..... EC or TDS reading; pH (don't bother with this on RO/DI, do bother with TDS/EC though to confirm it's working well enough)
-Strain and age
-Climate: night and day ambient T and RH%; res' temperatures; any extremes in T/RH% exposure
- Light used: HID, LED, COB, combo of,... wattage; light cycle hours (20/4, 18/6 , etc.); distance to tops....
-Additional info: PH in the root zone. How long have the plants been affected?...How fast did symptoms appear?... Anything else you think might be relevant..

--Pictures including WHOLE PLANT PICS, and troubled leaves.. use normal light or flash as other light sources ruin color rendering, critical for diagnostics! Turn off the grow lights.

✂ - - - - - - - - - - -
(copy and paste)-->

Problem:

Medium/grow method:

Feed: and supplements used:

water source:

PH in the root zone:

Strain/age:

light used:

Climate:

Additional info:

 

[mohawk warrior]

And iron issues is my guess but listen to the man with The probes (MOG)

 

[B_dub]

@Mañ'O'Green

Problem: light yellowing of leaves from the tips. I think it started traveling in from the sides and tips toward the veins and back toward the base


Medium/grow method: mixed half and half Happy Frog and Ocean Forest plus added perlite in 3 gallon fabric pots


Feed: and supplements used: few light coverings of earthworm castings..maybe once a month. I didn't do any actual nutes until week 4. Gave it Big Bloom and Grow Big once during mid week 4 at 1/4 strength (8/18, ppm 573). Then switched to Big Bloom and Tiger Bloom 2 waterings later (8/22, ppm 287).
8/26- ppm 326
8/29- ppm 531
9/1- ppm 510
9/4- ppm 658
9/8- ppm 776
9/9- very very tips of leaves turned brown. Suspected nute burn. Flushed and watered plain water for 2 waterings
9/15- went back to my lower measurements (1/4tsp tb, 1/2tbsp BB) yet PPM read higher than when I used more. Realized I used hot water to fill my bucket I dechlorinate in, so guess that changed it some. Diluted down to ppm 552.
9/17 and 9/19- plain 6.5 PH water

So I started with 1/4 tsp tiger bloom and 1/2 tbsp big bloom every other watering (1.25L h20). Slowly worked up to 1/2tsp TB and 3/4-1tbsp BB in 1.25L until got slight nute burn. Flushed w 2.5x normal water. Resumed with lower nutes (1/4tsp tb, 1/2tbsp bb per 1.25L) after 2 more waterings with plain water.




water source: tap, dechlorinated w air stone for 24 hours or more (checked that water company doesn't used chloramine). Ph is around 7.5. Tds/ec 182ppm, ec 03640.
I started watering around 5.8-6 ph and slowly worked up to 6.5.
Water by hand

PH in the root zone: when I flushed before I got it down from like 1500 ppm to 1200ppm I think (didn't write down). Wasn't really sure what it should be.

EDIT: on 9/21 the runoff was around 964-1003 ppm. This was after only 2.5L of water...I usually water it 1.25L every other day so basically just double.




Strain/age: sweet tooth from 207 genetics, week 8, sprouted from dirt July 20


light used: mars ts600w (100 true watt) at 20/4 run time

Climate: 79-81°F, 55-63% RH during light
75-77°F, 55-63% RH during dark (ballpark)

I fight w the RH every time I finish watering. Evem vent the tent door when possible


Additional info: Nothing major has happened other than nute burn and breaking top totally off during LST in week 5..didn't discover til too late to save (tried taping but never came back). I do have trouble keeping the humidity as low as I'd like but have a lower intake fan, plenty of airflow thru canopy w circulating fans, and good exhaust.

 

[B_dub]

FYI some pics I did flash and some without. Thought that may help. Let me know if need to redo or take differently