Is this a Cal/Mag deficiency?


#1

This is my 2nd grow and I’m still unsure of my troubleshooting skills. Any help is appreciated. Thanks


#2

Where on the plant are they showing deficiency? On the newer upper growth or on the lower older growth? Looks like calcium def to me


#3

At the top.


#4

Cut it off looks diseased


#5

I’m with @Thelaughingwolf it look like a calcium deficiency


#6

Rust spots like that can also be mag def – best to treat both symptoms at same time. Most soils and nutes do not
have enough or any trace nutes - these trace ones are the ones that help everything else go.


#7

Thanks everyone.

I have 4 plants that have/had this problem but gave them all some Cal/Mag. I suppose if it were rust fungus (problem on my first grow) I would see it on all of them. I’m using RO water. Should I just add cal/mag to the RO water whenever topping off?


#8

You can try adding cal mag to the water but I’ve never had any luck correcting deficiencies that way. My current grow I layered gypsum and Epsom salts into the soil mix and that has prevented any
problems


#9

You always need to add cal-mag when using R.O. Water.


#10

OK…will from now on. Thank you


#11

it look like a calcium deficiency
whats your pH?


#12

Thanks…growing hydroponic and using RO water. It was a Cal/Mad deficiency.