Cam anyone identify this? Need help

[kenelma]

Need help identifying what is wrong with my hemp plant. I have attached a photo of the leaf. Looks like some type of fungus but I have never bumped into this before. Thanks in advance for any help provided

[Ladithief]

Sorry if you already have… the first thing I do is roll my leaves over and look for unwanted guests…

[Packee]

[Packee]

Possible Mg deficiency??

What’s your medium, pH, nutes

Have you sprayed them with anything.

Packee

[blackthumbbetty]

I think it might be Septoria.

https://growersnetwork.org/cultivation-resources/growers-networks-disease-profile-septoria-leaf-spot/