I am a newbie cannabis grower started this year, but I have been gardening all my life. Although I have never paid much attention to ph for gardening I used the city water, through my readings prior to growing I realized Ph was an important aspect of growing as was water quality. No more straight city water.
As I am only growing for personal use (2 people) my water usage is minimal so I purchase Crystal purified water from the machine outside my Safeway grocery store $0.25 per gallon. I have a bunch of 7 gallon water containers for camping which I use for storage. I also have a bunch of 1 gallon bottles that I use for mixing.
Based upon my reading I needed Ph for soil growing (switching to coco for next grow) in the low to mid 6 range. The Crystal water Ph was a little high so I used white vinegar to lower the Ph to that range. I then used that water to water AND mix my nutrients in, using Fox Farms Trio for soil.
I was advised by someone who grows professionally that using vinegar will change the Ph but that over time it will revert to the original Ph. I did a test with 1 gallon of water and found that the Ph remained stable for at least 4 weeks so I don’t mix more than I am going to use in the next few days.
While reading about Coco growing medium I read for the first time to check the ph AFTER adding the nutrients and adjust the Ph then. This should have been obvious but when starting out I was trying to carefully follow growing procedures I had read.
Anyway with the Crystal water if I want plain water I have to add 35 drops of vinegar to each gallon of water (Ph starts in the 7+ range) BUT if I want my nutrients solution to be the proper Ph I need to raise the Ph of that same water significantly after adding the nutrients to achieve the proper Ph as the nutrients mix has a Ph in the low 5’ possible upper 4’s. Currently I don’t have a Ph testing tool that goes below 6.2. Ph testing Methods suck I’ve tried a probe and I could not get it calibrated from the start. Currently using strips but changing to the Ph Up/Down system which comes with a tester which uses water and a reagent and color scale.
I have probably been stressing my plants with h2o that is the proper Ph and then the nutrients solution is really low.
Hope this helps someone and happy growing.
Now I get to see how cannabis does in 110-115 degree temps. Oh I am growing autoflowering plants.