Slightly concerned

S

Sorefinger

Member
IMG_6457.JPG So currently I have 4 plants - LSD, Liberty Haze, CBD Critical cure and Cookie Kush.

For the last week the cookie kush has been getting worse at a rapid rate. (The rest are perfect)
Some leaves are fully yellow with brown spots some are yellow with green in the middle. All the leaves tops that are affected have leaves rolled upward. I'm at a loss what it is. Some people have mentioned my PH as it's 5.8 but why would it have only just started to effect the plant.

I'm wondering if it's an extreme version of nute burn, but I've never seen an extreme version like that!

I'm two weeks from flowering and plan on not giving any nutes to any plants for the final weeks.

Advice would be much appreciated!
 
Sorefinger said:
View attachment 3850229 So currently I have 4 plants - LSD, Liberty Haze, CBD Critical cure and Cookie Kush.

For the last week the cookie kush has been getting worse at a rapid rate. (The rest are perfect)
Some leaves are fully yellow with brown spots some are yellow with green in the middle. All the leaves tops that are affected have leaves rolled upward. I'm at a loss what it is. Some people have mentioned my PH as it's 5.8 but why would it have only just started to effect the plant.

I'm wondering if it's an extreme version of nute burn, but I've never seen an extreme version like that!

I'm two weeks from flowering and plan on not giving any nutes to any plants for the final weeks.

Advice would be much appreciated!
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To me it looks like it started several weeks ago. Look at the areas of your perfect plants. I bet if you look really close you will see early signs of dead spots on the larger leaves on the upper part of your good plants in the same areas as the bad plant. Deficiencies start before there is any visible signs. I'm guessing the other were right. You probably have calcium lock out from low PH.
Also I have a feeling you have a lot more than two weeks till harvest. No worries, fix the problem and the plant with the bad leaves will still finish fine.
 
Buba Blend said:
To me it looks like it started several weeks ago. Look at the areas of your perfect plants. I bet if you look really close you will see early signs of dead spots on the larger leaves on the upper part of your good plants in the same areas as the bad plant. Deficiencies start before there is any visible signs. I'm guessing the other were right. You probably have calcium lock out from low PH.
Also I have a feeling you have a lot more than two weeks till harvest. No worries, fix the problem and the plant with the bad leaves will still finish fine.
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Cheers Buba. Would you suggest flushing it with the correct PH water. Then add nutes again?
 
Lordhooha said:
What sort of grow you doing soil or hydro, coco, soil, or whatever what nutrients you feeding, temps and such give more info
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I'm using Bio Bizz light mix soil and using around 50ml of Bio Bloom and 50ml of Top Max - I have started adding the PK13/14 this week & the room temp is around 27c
 
Sorefinger said:
I'm using Bio Bizz light mix soil and using around 50ml of Bio Bloom and 50ml of Top Max - I have started adding the PK13/14 this week & the room temp is around 27c
Click to expand...

Ok. I had the problem of a low soil ph when I changed the way I watered. I was letting them dry out but was using to much water with a 20% runoff with each watering causing a low soil ph and probably also soil leaching. Low soil ph causes lock out of some nutes including calcium. Leaching causes nutrients to be washed out of the soil and calcium is one of the easier nutes to leach. Your problem and solution may not be the same. For me the solution was to not fertilize for 10 days and return to my old way of watering (I also added some Dolomite Lime to the top soil). Damage continued for about 5 more days until the ph improved. My plants look really ugly with a lot of missing leaves at 11 weeks of flowering. They have 1 week to go, buds are not tight but have awesome crystal that I have tested and it's a great smoke. I think my normal flowering time for these seeds is 11 weeks so I feel my problems may have delayed the finish by a week. Good Luck!
Someone may tell you to flush. In my case that would have been the worst thing to do.
 
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