Mr E, I switched my plants over to bloom about 2 weeks ago and finally noticed (several grows in) that the ph level in blooming nutes lean very strongly downward. I had been having the same issue you had recently...was using baking soda to keep it up but it would drop overnight which it NEVER did with the grow nutes. Guess I have been paying more attention since my molasses party. I'm now almost 3 weeks in 12/12 and am noticing the plants are now big enough to start shift the ph back upward. I'm convinced it's something in the difference between the grow and bloom nutes.
Weedhound Reviewed by Weedhound on . Drop in pH..but good growth...???? Hi all. I'm about 3 weeks into vegging and my girls look great. Lush and healthy. I've been experiencing slight drops in pH like from 6.0 to 5.7 or 5.7 to 5.5 during the light cycle. I'm not sure what it means or if it's fine or what. TDS at the last rez change (5 days ago) was about 1700 with all nutes and supplements combined. The plants took very well to it. TDS today is 1370 so the plants are using up the nutes. Usually when plants use nutes the pH tends to increase a bit, not Rating: 5