First sign of yellow tips

[Nectarivorous]

Hi all. These girls have been looking great some overwatering for a brief time on one of them but nothing else. Lights were turned up to current setting of 430 ppfd about 5 days ago, plants are 30 days since planting today. They have seemed to respond beautiful. I stepped up nutrients from 1.7 to 2.1 EC two days ago as I thought they were a bit low - I suspect I've caught some nutrient burn before it gets too bad and should pull back to wait 1.8 before it gets worse. Anyone got alternative ideas? Mostly the rapidly growing secondaries which are responding to the topping that are affected. We're topped 36 hours ago. Any help appreciated.

 

[Nectarivorous]

This only appeared this morning just after watering btw. Cheers!

 

[Shayne010944]

id be thinking you need cal mag , and your ec seems way too high

 

[Nectarivorous]

id be thinking you need cal mag , and your ec seems way too high

Yep I agree. Should be around 1.7. I was getting 1.3 out so thought I could boost that by going over 1.7 until it balanced. Raise now should always just apply at the level I'm trying to get them to. I'm using Canna A+B, you would add some Calmag to that?

 

[Shayne010944]

Yep I agree. Should be around 1.7. I was getting 1.3 out so thought I could boost that by going over 1.7 until it balanced. Raise now should always just apply at the level I'm trying to get them to. I'm using Canna A+B, you would add some Calmag to that?

im not sure on those nutes but i would be thinking it def needs cal mag