What’s causing this?

[Willis]

Thank you to everyone for the swift replies, I’ll try switching to AN seems it’s less heavy and I’ll feed more cal/mag and pk, will update with further changes.

 

[Willis]

so you're caught in the hand off between whats in the soil and where you need to start feeding.
considering you went with a low dose i don't see it being an issue.

i'm with @Growings on the issue. calmag and a little pk is what it's asking. there's plenty of N. you can mix the calmag on the water side if you follow a f/w/f/w schedule. maybe even up the sesame a touch. this is where the spoons won't help. i'd consider ramping by half gram increments or so as it builds and the nutes in the soil deplete.


edit : or drop it altogether for now and go back to AN. it's a tough call as no one can tell what's left in the soil.

Anything I could use to only increase pk Without adding extra n?