Brown spots on fan leaves near top of plant

[heyitsvic]

Thank you!

[heyitsvic]

Yeah that makes sense! I'll hold off on defoliating until things improve. That's a good idea

[Dutchman1]

Sounds like you have a good plan, stick with it.

[abadtrip]

If u are getting light burn from your leds I would defol very little if all and wait to see what happens.
If it continues u are going to want more leaves because they will start to die off but they will protect the leaves underneath for a little. Then u can take off the dead leaf
This is last case if u cannot fight off this problem and u need to live with it.
So I gess I am saying wait to defoliated untill u know u won't need the leaves u are going to take.

[heyitsvic]

Yeah, the plant is quite bushy... I actually did some light defoliation on it last week, but am a bit apprehensive about taking off too many leaves...

Reading and watching videos, I've seen growers take very few leaves to strip the entire plant. I personally decided to start slow (being a first time grower) and defoliate different parts of the plant to see the results.

My current feed-water schedule is to alternate between feed and water every 2-3 days. I will try adding molasses to my feed as well!

I also forgot to mention the strain I'm growing: northern light by Nirvana.

[PRIMO]

I would say it's time to defoliate,you did not say what your feed-water schd. is but I would also add more cal-mag and molasses with water.

[heyitsvic]

I've raised the lights, did some LST on the affected colas, and raised CaMg just in case. Hopefully the brown spots stop progressing :/

[Dutchman1]

Maybe lights, cal/mag couldnt hurt.Thats what it looks like to me.

[heyitsvic]

I have been making sure that the runoff matches the pH and ppm that goes into the medium.

[heyitsvic]

Yeah, that was my second guess! I'll try doing some LST training on the three colas that are affected, since raising the light will be very difficult.

[Chefbjy]

Agree you should raise the light. Light burn can cause other deficiencies.

[D.A.A.S.69]

Yeah, looks like Led, bleaching, raise your lights, gonna be hard to do in short tent.

[abadtrip]

Raise your led and add more calmag it looks like the led is burning the leaves it's-on the top but not the very top so they have been under the light longer. Just a guess tho

[UrbZ]

Have you checked pH runoff? It could be a high pH issue.

[heyitsvic]

Thanks for the reply UrbZ !

Isn't it the same case for Potassium, as it's also mobile (like phosphorus)? The strange thing is that the bottom and middle leaves look fine.