What is the max ppm I can give my plants in the ve...

Hello @Ushangreen, It depends on few factors, strain and growth are the main ones. A 1 week plant will handle less then a 4 week veg bigger plant, and some strains are more sensible then others. To give you an idea: Week 1 veg, ec 0.5 > 0.8, Week 2 veg 0.8 > 1 Week 3 veg 1-1.3, then i keep at 1.3. Bloom you climb up to 2.0 or more depending on your variety. Observing always if the leafs are light green, then raise the base if it burns the tips decrease. Happy growing.