Small rust colored spots on 20 day old plants?

L

LeoRavus

Active Member

• Jan 12, 2024

• #1

I've been throwing around calcium deficiency or rust fungus. Growing in coco.

They were topped 3 days ago and the growth has been fine, but today I'm seeing these spots on both of them. Mostly on the older leaves. Whatever it is I want to catch it early.

 

SofaKingHigh_

Well-Known Member

• Jan 12, 2024

• #2

LeoRavus said:

View attachment 5360487

View attachment 5360488

View attachment 5360489

View attachment 5360490

I've been throwing around calcium deficiency or rust fungus. Growing in coco.

They were topped 3 days ago and the growth has been fine, but today I'm seeing these spots on both of them. Mostly on the older leaves. Whatever it is I want to catch it early.

Click to expand...

What nutrients are you using? Could be ph issue or a nutrient deficiency of calmag

 

MickFoster

Well-Known Member

• Jan 12, 2024

• #3

A calcium deficiency starts on the newer leaves.
What is your feeding schedule?
Did you buffer your coco?
What is your water source?
Are you feeding plain water?

 

L

LeoRavus

Active Member

• Jan 12, 2024

• #4

It's Advanced Nutrients sensi coco on the week 2 schedule. So about 1/2 strength currently. The coco was buffered in Calimagic. Water has been purified water and Ph has been roughly 6.1 each feeding. Never gave them plain water. Humidity was at 73% and dialed that down a little today. Not sure if it has to do with anything.

 

MickFoster

Well-Known Member

• Jan 12, 2024

• #5

Are you using a calmag supplement?
Are you feeding daily to run off?

 

L

LeoRavus

Active Member

• Jan 12, 2024

• #6

MickFoster said:

Are you using a calmag supplement?
Are you feeding daily to run off?

Click to expand...

Using Calimagic each feeding but only at about 1/2 strength. The nutrients have a little calcium and magnesium in part A.

Been feeding once daily to runoff, but skipped the day after topping. Was feeding twice a day in seedling stage.