Can this be caused by windburn?

[papa canna]

I think my fan might be doing a bit too well here. These are on about week 3 of veg and this one looks worse than the others. I haven't started feeding yet, and my Ph is always 5.8-6.3 growing in a slightly charged peat mix

 

[Budley Doright]

I've not seen a fan do that but I never have it directly in plants. This run I forgot the fan and just never did plug it in and no worse for wear. It's the third run I've not used a fan and I'm thinking it's not needed if canopy temps are ok. I do have lots of ventilation though.

 

[vostok]

slightly charged peat mix.?.. you say

in truth.. is over the top....peat holds water

ur water got nutes and these can/have reached nuke levels ...or about too

treat as for over nuted plants and flush 3 times the pot vol.

allow to recover over night or 8 hours in dim light

or better

potup no nutes 2-3 weeks

good luck

 

[papa canna]

slightly charged peat mix.?.. you say

in truth.. is over the top....peat holds water

ur water got nutes and these can/have reached nuke levels ...or about too

treat as for over nuted plants and flush 3 times the pot vol.

allow to recover over night or 8 hours in dim light

or better

potup no nutes 2-3 weeks

good luck

It's going to have to be a flush. I've already potted up as high as I can. I will keep a close eye on them.