What's new
  • ICMag with help from Landrace Warden and The Vault is running a NEW contest in November! You can check it here. Prizes are seeds & forum premium access. Come join in!

Single leaf turning much lighter green than the rest of the clone?

U

underveggies

Member
So a single leaf on my 6 week old Clue Magoo clone is turning a few shades lighter green than the rest of the plant.

Here's two pics.



The second photo looks like the top leaves are the same color but it's just due to the lights, they're all about the shade of the small part of leaf in the top left of the first photo.

There are also a couple small rust looking spots developing. Thought I'd see if maybe I can stop a problem before it gets bad. Anyone know what's up?
 
Manastasis

Manastasis

Member
My first guess would be you are having a ph issue. The pics are little tough to see clearly. How are you growing her (soil/hydro,etc)? Do you monitor your ph?
 
U

underveggies

Member
Manastasis said:
My first guess would be you are having a ph issue. The pics are little tough to see clearly. How are you growing her (soil/hydro,etc)? Do you monitor your ph?
Click to expand...

Wow now I feel stupid for not knowing what the problem is. So I bought this clone from a dispensary and they said it was a soil mix, but my current setup is all coco and I didn't even think that adding the hydro nutes I had mixed up for my other plants (pH'd at 5.8) into the soil might fuck things up. Going to be transplanting it into coco tomorrow so hopefully it will adjust to the environment..
 
Manastasis

Manastasis

Member
Could also be a calmag deficiency. Can happen as a result of ph imbalance causing nutrient lockout. Cal deficiency is common if using coco and reverse osmosis water. You may need to supplement with a calmag supplement as coco is a pretty nuetral medium and r o water is devoid of natural calcium and mag. If you determine that is the issue (be sure you've figured out beyond doubt so you dont make things worse while trying to make mo bettah), correct it and in the meantime give a calmag foliar untill she bounces back. I grow in soil so calmag and ph are rarely an issue for me but to the best of what you've said about your situation and what i know id start there. Good luck, let us know how things go!
 
Manastasis

Manastasis

Member
Nutrient lockout can be a confusing ordeal. I agree with Martha Focker that she looks hungry. But she does look like shes having a calmag issue. Calcium is an immobile (fixed) nutrient meaning the plant cannot transport it from say: lower leafs to upper leafs like it can with nitrogen. It needs to be present and available to the plant at the rootzone. If the issue is starting on the lower half but the fresh growth looks cherry its probably a mobile nutrient issue like nitrogen. If the problem is affecting the new growth but not so much on the old its probably a fixed nutrient issue. If its happening the the whole plant at the same time look into the rootzone. Are the roots healthy and doing their thing? Judging by the yellowing leaf but having green veins as well as rust spots i would really start looking at it as cal+mag defficient and if it was in a soil mix with enough nutrition than ph related nutrient lock out would be my first thing to check. Here's a few charts that may be of assistance to you. Mulders chart shows how various nutrients are affected by others.
 

Attachments

  • leaf_trouble_chart.JPG
    leaf_trouble_chart.JPG
    49.9 KB · Views: 12
  • best_cannabis_deficiency_visual_chart.jpg
    best_cannabis_deficiency_visual_chart.jpg
    102.9 KB · Views: 10
  • resourcesmulders-chart.jpg
    resourcesmulders-chart.jpg
    42.5 KB · Views: 17
U

underveggies

Member
Manastasis said:
Calcium is an immobile (fixed) nutrient meaning the plant cannot transport it from say: lower leafs to upper leafs like it can with nitrogen. It needs to be present and available to the plant at the rootzone. If the issue is starting on the lower half but the fresh growth looks cherry its probably a mobile nutrient issue like nitrogen. If the problem is affecting the new growth but not so much on the old its probably a fixed nutrient issue. If its happening the the whole plant at the same time look into the rootzone.
Click to expand...


Wow. This is great information. I've been slacking lately on my research but every time I learn something new like this about plant functions it gives me a deeper understanding and connection with the plant. Thank you so much for this info, and for the inspiration to get back to my research. I'm thinking most likely it's a pH lockout as you said due to adding the hydro nutes to am already nutrient sufficient soil mix. Thanks again. :tiphat:
 
S

Sat X RB

soil mix! what was in the initial soil mix ? bet yr dunno. this is from mixing two different soils.
 
Manastasis

Manastasis

Member
You're very welcome and I hope your girl is able to get back in the game! We all have our succeses and failures (god knows ive had my share). Ive found that when i encounter challenges they are easier to overcome if i look at the situation objectivly; then the solution stands out like a sore thumb.
 
U

underveggies

Member
Martha Focker said:
it's not gonna turn back green. it's just gonna keep turning yellow till it shrivels up and falls off.
Click to expand...

So here's pics from today.
Here's the leaf I posted before, dying as you said it would.




This is the second leaf to show symptoms, it's just a bit higher than the first one, looks like it's moving upward.




And this is the third leaf, just above the second leaf.



So I transplanted it from a small pot to a 2gal 48 hours ago. When I bought the clone it was soil, and I fed it a 50% strength nute mix (h3ads 6/9 formula: 6mL/gal micro, 9mL/gal bloom,) with tap water.

My water comes out the tap at 7.8. I pH everything to 5.8 after it's all mixed.

Read somewhere it might be because the tap water, "the excessive calcium locks out magnesium and sometimes the other way around"


Anyone?
 
Manastasis

Manastasis

Member
underveggies said:
So here's pics from today.
Here's the leaf I posted before, dying as you said it would.
[URL=https://www.icmag.com/ic/picture.php?albumid=64232&pictureid=1526256&thumb=1]View Image[/url]



This is the second leaf to show symptoms, it's just a bit higher than the first one, looks like it's moving upward.
[URL=https://www.icmag.com/ic/picture.php?albumid=64232&pictureid=1526254&thumb=1]View Image[/url]



And this is the third leaf, just above the second leaf.
[URL=https://www.icmag.com/ic/picture.php?albumid=64232&pictureid=1526255&thumb=1]View Image[/url]


So I transplanted it from a small pot to a 2gal 48 hours ago. When I bought the clone it was soil, and I fed it a 50% strength nute mix (h3ads 6/9 formula: 6mL/gal micro, 9mL/gal bloom,) with tap water.

My water comes out the tap at 7.8. I pH everything to 5.8 after it's all mixed.

Read somewhere it might be because the tap water, "the excessive calcium locks out magnesium and sometimes the other way around"


Anyone?
Click to expand...
Hey is your tap water from a municipal source and if so are you allowing it to dechlorinate before mixing up your nutes n feeding?
 
You must log in or register to reply here.

Latest posts

Latest posts

Top