Top leaves yellowing

[Ronbo]

Can anyone tell me off hand what would cause this... It's just on the top leaves. Sorry for the lighting. Been in bloom for 3 weeks.

 

[Southerncough]

Definitely take a new photo. Just turn the LED off and use your flash.
Could be anything from calcium deficiency to light burn.
How close is the light to the plant?

 

[Pbass]

Hiya @Ronbo I had a plant with a couple of leaves just like that on my first round. My deal at the time was PH. Too hot, soil running around mid 7's, i found out with a pool tester my water runs at about 7.5-7.8, so I started adding 4tsp vinegar to every gallon of water, it gets my soil PH down to just over 7. CHeers, good luck to your grow!

 

[Ronbo]

Hiya @Ronbo I had a plant with a couple of leaves just like that on my first round. My deal at the time was PH. Too hot, soil running around mid 7's, i found out with a pool tester my water runs at about 7.5-7.8, so I started adding 4tsp vinegar to every gallon of water, it gets my soil PH down to just over 7. CHeers, good luck to your grow!

I check the water before every feeding.... 5.8 to 6.2.... It's weird that just a few leaves are like that....

 

[Chris Scorpio]

Looks like the last hotel room bed I rented when I put the black light on it

Jizzzzzz everywhere

 

[Ronbo]

Looks like the last hotel room bed I rented when I put the black light on it

Jizzzzzz everywhere

IKR...... ha. ha. ha. and its on the top leaves

 

[kruton]

usually yellowing from bottom up means n defiency and yellow top down shows heat or light stress

 

[Emilya Green]

even in the purple light, that sort of damage in the upper leaves points to calcium deficiency. Check that your pH is correct for the medium you are growing in, and consider adding calmag+ to your nute regime.

 

[Danarano]

Hiya @Ronbo I had a plant with a couple of leaves just like that on my first round. My deal at the time was PH. Too hot, soil running around mid 7's, i found out with a pool tester my water runs at about 7.5-7.8, so I started adding 4tsp vinegar to every gallon of water, it gets my soil PH down to just over 7. CHeers, good luck to your grow!

what was your final yield on this, Did you ever weigh?

To “hot” would be a ph of under 6 for soil like a 5.6 your explaining to alkaline

 

[Stoned Ape]

Looks like the last hotel room bed I rented when I put the black light on it

Jizzzzzz everywhere

Was that before or after u got there lol