depends on what type of meter you have .5 .7 conversion??
PPM for Hanna (.5 conversion) Chart PPM
Seedlings, Early Sprouts 100 to 250
Early Vegging 300 to 400
Full Vegetation 450 to 700
Early Blooming 750 to 950
Full Mature Blooms 1000 to 1600
Note: EC Calculations are different, here's a conversion chart : heres a great chart that shows how different PPM can be from meter to meter... EC is the only real universal language...
1.3 is too high for early veg.
try like .6 for new clones, around 0.8 once theyre established. maybe bump it up when they get a little bigger (~8 to 10 inches)
You really dont need to go over 1.0 or 1.2 in veg.