If you use 3 part nutrients then make sure you have the Micro for hard water and mix the micro first. That is a little hard for young plants but they should be ok. Are you growing hydro or dirt farming? Dirt will give you a buffer where hydro will not when using hard water.
Zandor Reviewed by Zandor on . TDS,Well Water, and Hardness I was wondering if it was ok to water my plants with some well water...it's chlorine free and the TDS is about 130....and the water is about 8 grains hard (calcium and magnesium)..anyone? Rating: 5