During the first week of 11 on 13 plants progressed signs of deficiencies so this week I've increased the ec to 1. Not actually sure how much ml/l nutrients I'm using I add a bit at a time until it reaches my desired concentration.
I've also lowered the light to about 4 inches above the taller plants.
@moeGrow,i know that sativa strains dont like hard feeding ,some take it ok but go easy,just in case ,i see some spots on leafs and some slight burns ,idk cause the light isnt good to distinguish colors if there are problems with the plant,in general a plant needs ph being stable not fluctuating.that can lead to problems
https://www.maximumyield.com/perfecting-ph/2/1212
happy growin
@Blacklisted, I let the ph drift between 5.5 and 6.2 to allow for uptake of nutrients all the way along the range. As they eat it climbs higher, I've also increased their feed to 1.9 EC biggest part if that increase is the magnesium sulfate as they cant seem to get enough. Sativas generally dont like strong nutrients but these girls are pretty happy.