Dr.B
- 1,074
- 163
As some of you may know, I've been teaching myself about media pH and alkaline buffering. I recently started mixing 2 tblsp dolomitic lime per gallon of promix hp. w/ 1 gallon of perlite to every 3 gallons of promix/lime.
I start prepping the media two weeks in advance to allow the lime to activate. Before planting the cups are flushed down to 0.8 EC left to dry and then fed at pH 5.9/EC 1.2. after feeding the media is testing at a pH of 6.5, leech water pH 6.1 EC 1.0...
Mostly I have happy plants but the clone cups are testing at around 6.8... giving me problems every couple days. I think they got a higher concentration of lime... I'm going to top dress those cups with a little straight pro mix at the next watering, hopefully that brings the pH in line with the other plants. I plan to continue watering in at 5.9 as long as everything stays consistent.
My question; Can anyone provide a little insight on what I've done here and whether or not my chosen course is the best one?
Thanks!
D
I start prepping the media two weeks in advance to allow the lime to activate. Before planting the cups are flushed down to 0.8 EC left to dry and then fed at pH 5.9/EC 1.2. after feeding the media is testing at a pH of 6.5, leech water pH 6.1 EC 1.0...
Mostly I have happy plants but the clone cups are testing at around 6.8... giving me problems every couple days. I think they got a higher concentration of lime... I'm going to top dress those cups with a little straight pro mix at the next watering, hopefully that brings the pH in line with the other plants. I plan to continue watering in at 5.9 as long as everything stays consistent.
My question; Can anyone provide a little insight on what I've done here and whether or not my chosen course is the best one?
Thanks!
D
Last edited: