Register ICMag Forum Menu Features Search Today's Posts Mark Forums Read
You are viewing our:
in:
Forums > Marijuana Growing > Cannabis Infirmary > Brown/Black Spotting and Leaf Yellowing

Thread Title Search
Click to visit Twilight Labs
Post Reply
Brown/Black Spotting and Leaf Yellowing Thread Tools Search this Thread
Old 09-25-2017, 06:10 PM #1
kjfoster93
Newbie

Join Date: Sep 2017
Posts: 2
kjfoster93 is on a distinguished road
Brown/Black Spotting and Leaf Yellowing

Hi all,

I'm a new indoor grower and have recently noticed an issue that I can't quite identify. I've been growing 2 different plants in soil, White Widow and Mama Mia. The plants grew very well during veg and are currently about 2.5 weeks into flowering. Over the last week I have noticed black spots develop on many leaves of the White Widow plant. Over the last few days, the spots have increased in numbers and leaves with the spots have noticeable leaf yellowing. Leaves without the spotting look fine and healthy. Besides a plant disease, the only deficiency I could image this would be is a calcium deficiency...but I have been giving them low dose cal/mag and using local water which should have ample calcium. We did have some gnats in the tent, which I have since eradicated with fly tape. Not sure if this is related? The Mama Mia is completely unaffected and has perfect color and no spots. Both plants are fed/watered identically, which up until now has not led to any issues. I have been feeding at about 3/4 recommended strength and have not to date had much nute burn.

Nutrients
Fox Farm Bloom
Fox Farm Grow Big
Fox Farm Tiger Bloom
Fox Farm Boomerang
Botanicare Liquid Karma
Botanicare Hydroguard
Botanicare Cal/Mag

Grow Medium
Fox Farm Ocean Forest
5 gallon pots
Watered 2 times weekly till runoff
Soil pH at root = 6.6
pH of nutrient/water added during each watering = 6.5

Grow Setup
2x VIPARSPECTRA Reflector-Series 300W LED
1x iPower GLFANXINL4FILT4M 4-Inch Carbon Filter/Fan combo
Small fan inside tent for air circulation

Humidity is currently around 45-50%. I have slowly been decreasing this leading up to harvest time.
Temperature is maintained around 70 degrees.

Pictures:
https://ibb.co/eAf6Tk
https://ibb.co/mvXxZQ
https://ibb.co/hvs9g5
https://ibb.co/iqjpg5

Feeding Schedule
https://ibb.co/jiUpg5

Any ideas on what I should do next?

Please let me know if anything else needs to be elaborated.

Thanks!
kjfoster93 is offline Quote


Old 09-25-2017, 08:04 PM #2
AgentPothead
Member

AgentPothead's Avatar

Join Date: Jun 2017
Location: Grassachusetts
Posts: 516
AgentPothead is a glorious beacon of lightAgentPothead is a glorious beacon of lightAgentPothead is a glorious beacon of lightAgentPothead is a glorious beacon of lightAgentPothead is a glorious beacon of lightAgentPothead is a glorious beacon of lightAgentPothead is a glorious beacon of lightAgentPothead is a glorious beacon of lightAgentPothead is a glorious beacon of lightAgentPothead is a glorious beacon of lightAgentPothead is a glorious beacon of light
I'm new to all this, so this is mostly a shot in the dark. Is there any raised texture to the bumps at all? Like a lesion? If so, I have a feeling that is leaf septoria. It starts with yellow dots, but they go black/brown over time.
https://www.growweedeasy.com/yellow-l...-leaf-septoria
If it's not that hopefully somebody else will chime in. And if it is that hopefully somebody knows a good fix. Good luck kjfoster!
__________________
You may not vote on any more threads today.
Don't sweat the technique.
AgentPothead is offline Quote


Old 09-25-2017, 08:30 PM #3
kjfoster93
Newbie

Join Date: Sep 2017
Posts: 2
kjfoster93 is on a distinguished road
They do seem raised a little bit. Fortunately, I have been proactively spraying the leaves with a broad spectrum plant disease/fungicide so if it is septoria, hopefully it will help to stop the spread of it..
kjfoster93 is offline Quote


Old 09-25-2017, 08:32 PM #4
AgentPothead
Member

AgentPothead's Avatar

Join Date: Jun 2017
Location: Grassachusetts
Posts: 516
AgentPothead is a glorious beacon of lightAgentPothead is a glorious beacon of lightAgentPothead is a glorious beacon of lightAgentPothead is a glorious beacon of lightAgentPothead is a glorious beacon of lightAgentPothead is a glorious beacon of lightAgentPothead is a glorious beacon of lightAgentPothead is a glorious beacon of lightAgentPothead is a glorious beacon of lightAgentPothead is a glorious beacon of lightAgentPothead is a glorious beacon of light
Good luck bro. This rip for you and your plants!
__________________
You may not vote on any more threads today.
Don't sweat the technique.
AgentPothead is offline Quote


Old 09-25-2017, 09:42 PM #5
maimunji
Member

Join Date: Apr 2015
Posts: 769
maimunji is just really nicemaimunji is just really nicemaimunji is just really nicemaimunji is just really nicemaimunji is just really nicemaimunji is just really nicemaimunji is just really nicemaimunji is just really nicemaimunji is just really nicemaimunji is just really nice
Scope for bugs. Pistils changing color 2.5 weeks in to flower isn't good sign. If you don't have bugs there you diffenetly over feed them.
maimunji is offline Quote


Post Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


All times are GMT +2. The time now is 06:34 AM.


Click to visit Original Seed Store for great Cannabis genetics


This site is for educational and entertainment purposes only.
You must be of legal age to view ICmag and participate here.
All postings are the responsibility of their authors.
Powered by: vBulletin Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.