Welcome to UK420

Register now to gain access to all of our features. Once registered and logged in, you will be able to contribute to this site by submitting your own content or replying to existing content. You'll be able to customize your profile, receive reputation points as a reward for submitting content, while also communicating with other members via your own private inbox, plus much more!

This message will be removed once you have signed in.


YOREEL

Sick plants - leaves curling inwards

Evening all,

 

My main grow is currently suffering. 

 

LED Qube 1.4m x 1.4m Tent

Logic 900 ( 3 x Logic 300 ) - All three Logics are set at 50% @ 20 inches

Currently Flowering - 2 x San Bacio Gelato & 2 x L.A Gelato Flipped DWC - 14th Nov 2020.

Currently on day 40 of flower.

Nutes - Current Culture - Bloom A&B, CocoCal, UC Roots & Bud Booster mid - EC 0.9.

Temps - 20°c lights off - 27°c lights on - RH 45 - 60% - with Dehumidifier running when RH rises.

 

Everything has been running smoothly in my DWC setup until about a week ago.

I noticed my ppm meter was set to ppm 700 instead of 500 so I've been underfeeding.

I saw 2 plants developing brown spots and put it down to underfeeding and it being the start of week 5 flower - possible looking mag def due to low phosphorous.

I increased the feed and bud booster to EC 1.0.

EC was dropping over the next few days so everything seemed fine. PH was in check ranging from 5.5 - 6.2.

Looking back now the PH was constantly dropping due to the low feed and since increasing the EC PH has stabilised.

Noticed the leaves curling inwards and thought the fresh res change would resolve it or maybe I'd added too much bud booster.

Done a fresh res change last night with a lower EC 0.9 with less bud booster.

Checked again tonight and all leaves seem to be curling inwards.

 

I can't see any pests and have sticky traps up that are fairly clean.

 

I've got 4 weeks remaining and was wondering if there's anything i can do to fix this?

 

Any help appreciated.

 

Pics to follow shortly!

 

Edited by YOREEL
Temps

Share this post


Link to post


One addition - Water temps are @ 18°c - 16ºc when swapping out. Used to fill to 15 gallons RO but now filling it higher to 20 gallons with it being later in flower. Not sure if that has anything to do with it as the water is higher up on the roots with about half inch. The net pots have a bump in the centre to help dissipate the roots so it's actually about 1.5inces off the water. Roots are nice and white also.

 

large.20201224_225140.jpglarge.20201224_225136.jpglarge.20201224_225133.jpglarge.20201224_225053.jpglarge.20201224_224936.jpglarge.20201224_224927.jpglarge.20201224_224917.jpglarge.20201224_224924.jpglarge.20201224_224906.jpglarge.20201224_224946.jpglarge.20201224_224911.jpglarge.20201224_225028.jpg

 

I have three fans in the tent - one small fan blowing over the canopy and two larger oscillating fans blowing up underneath. 

 

 

1 person likes this

Share this post


Link to post

I think it's a bit too cold.

1 person likes this

Share this post


Link to post

You could up your lights out temp a tad .. maybe 22 23c. Usually leaves like this is an indication the the room too dry or to hot or lights too close.  Are any of the fans catching that area ? Could be from that. Overall not looking bad at all. Don’t worry to much 

3 people like this

Share this post


Link to post

@mrrichiet  In my other 1.2m tent I have two of the same in DWC and the temps sit lower than the 1.4m (19-23°c) and they're not showing any curling leaves so I'm at a loss. I've raised the chiller temp to 20°c and see if that changes anything. The leaves feel quite crisp

 

I can't see any bugs. I wanna do a week 6 defoliation but didn't want to cause any more stress than what's going on at present. After self diagnosing (googling) I saw it could be russet mites. I can't see any damage or any evidence and that's why I wanted to do a extreme defoliation.

 

@OddNut I do have the dehu running at lights off from 6am during the day if RH rises also to raise the temps. 

 

Temps past 7days (°C)

Max - 30.6

Min - 19.8

Av - 24.6

Day - 26.5

Night - 22.8

1 person likes this

Share this post


Link to post
On 24/12/2020 at 11:56 PM, OddNut said:

You could up your lights out temp a tad .. maybe 22 23c. Usually leaves like this is an indication the the room too dry or to hot or lights too close.  Are any of the fans catching that area ? Could be from that. Overall not looking bad at all. Don’t worry to much 

This ^^^

 

Plus(I don't grow in dwc), 

but it might have been a reaction to the low temp of the water at res change,

get some hot water to take the chill off next time. My 2p :)

 

Looks like you're gonna have some nice sticky buds by the time these are done. 

 

Atb 

 

 

:yinyang:

1 person likes this

Share this post


Link to post

I think I've got something similar? 

 

Humidity is about 50, temps up to 28 at canopy, 24 at base. Lights out down to 20 at base. 

 

large.5fea5b7eb4846_3064(1)_compress42.jpglarge.3064_compress66.jpg

1 person likes this

Share this post


Link to post
On 24/12/2020 at 11:13 PM, YOREEL said:

One addition - Water temps are @ 18°c - 16ºc when swapping out. Used to fill to 15 gallons RO but now filling it higher to 20 gallons with it being later in flower. Not sure if that has anything to do with it as the water is higher up on the roots with about half inch. The net pots have a bump in the centre to help dissipate the roots so it's actually about 1.5inces off the water. Roots are nice and white also.

 

large.20201224_225140.jpglarge.20201224_225136.jpglarge.20201224_225133.jpglarge.20201224_225053.jpglarge.20201224_224936.jpglarge.20201224_224927.jpglarge.20201224_224917.jpglarge.20201224_224924.jpglarge.20201224_224906.jpglarge.20201224_224946.jpglarge.20201224_224911.jpglarge.20201224_225028.jpg

 

I have three fans in the tent - one small fan blowing over the canopy and two larger oscillating fans blowing up underneath. 

 

 

Looking good though pal! 

1 person likes this

Share this post


Link to post

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now