u/Advanced_Load_1340

Hey guys,

some of my cannabis plants suddenly developed brown/yellow burnt-looking edges on the leaf serrations basically overnight. Two days ago they looked completely fine, and now several leaves have these crispy tips/edges.

What’s weird:

only 3 plants are affected

the other plants in the same tent look healthy

all plants got treated exactly the same

I did NOT use any fertilizer yet

pH was always around 6.0–6.5

light distance is normal (~40 cm)

around 200W LED

temps are normal too

The only thing I changed recently was adding nematodes to fight fungus gnats. After that I kept the top layer a bit more moist than usual. Could that somehow stress the roots or cause nutrient lockout?

The affected plants also seem a bit lighter green compared to the healthy ones.

Does this look like:

potassium deficiency?

nutrient burn without feeding?

root stress?

overwatering?

pH/lockout?

something else?

Would appreciate any help because it appeared really fast and I’ve never had this before.

(Pictures attached)

Hey guys,

some of my cannabis plants suddenly developed brown/yellow burnt-looking edges on the leaf serrations basically overnight. Two days ago they looked completely fine, and now several leaves have these crispy tips/edges.

What’s weird:

only 3 plants are affected

the other plants in the same tent look healthy

all plants got treated exactly the same

I did NOT use any fertilizer yet

pH was always around 6.0–6.5

light distance is normal (~40 cm)

around 200W LED

temps are normal too

The only thing I changed recently was adding nematodes to fight fungus gnats. After that I kept the top layer a bit more moist than usual. Could that somehow stress the roots or cause nutrient lockout?

The affected plants also seem a bit lighter green compared to the healthy ones.

Does this look like:

potassium deficiency?

nutrient burn without feeding?

root stress?

overwatering?

pH/lockout?

something else?

Would appreciate any help because it appeared really fast and I’ve never had this before.

(Pictures attached)

Hey guys,

some of my cannabis plants suddenly developed brown/yellow burnt-looking edges on the leaf serrations basically overnight. Two days ago they looked completely fine, and now several leaves have these crispy tips/edges.

What’s weird:

only 3 plants are affected

the other plants in the same tent look healthy

all plants got treated exactly the same

I did NOT use any fertilizer yet

pH was always around 6.0–6.5

light distance is normal (~40 cm)

around 200W LED

temps are normal too

The only thing I changed recently was adding nematodes to fight fungus gnats. After that I kept the top layer a bit more moist than usual. Could that somehow stress the roots or cause nutrient lockout?

The affected plants also seem a bit lighter green compared to the healthy ones.

Does this look like:

potassium deficiency?

nutrient burn without feeding?

root stress?

overwatering?

pH/lockout?

something else?

Would appreciate any help because it appeared really fast and I’ve never had this before.

(Pictures attached)