Hi everybody,
I'm a hydroponic rookie, I'm running my first hydroponic system with
rockwool (vegetables, flowers). Looking around for infos about the ideal
hydroponic nutrient concentration I got totally confused. There are
different recommendations in different units for the ideal dissolved
solids concentration, e.g.
seedlings:
1: 800 ppm
2: 0.8 - 1 mS/cm
vegetative growth:
1: about 900 ppm
2: up to 2000 ppm
3: 1.8 - 2.3 mS/cm
Can anybody give me some answers to the following questions:
- Is 900 ppm for slow growing, 2000 ppm for fast growing plants ?
- What is the relationship between ppm and mS/cm ?
- Are calculated (from the N-P-K values) and measured ppm values the same
?
Thanks for your help - Gunther.
PS:
Concerning the pH value things are obviously easier: all recommendations
are close to 6.
