Hambone555
Active Member
My rain water is sometimes at. pH of 8.5 that’s why I test it.... it fluctuates like crazy. before you ask... I calibrate/ check it before every use.Hamboe555,
pH testing rain water?? You need to do a little research on exactly what pH is and how it would relate to rain water. That's similar to testing pH of distilled water.
I think you're over thinking things.
Problem with growing in (cow) manure based compost are many. This is a medium you need to know how long the composting process has gone - is the manure for use on vegetable gardens... lots of questions on that stuff. I don't use it. Too many variables. Likely you issue is not pH but your manure and soil mix.
For example on the manure. Were the cows grass fed or feed lot fed? Gonna be a huge difference in quality of the manure for gardening. It's going to be high phosphate and high Nitrogen regardless. Both of those a little goes a long way. There are better sources for each than manure from cattle.
Gardening outdoors in a hole - you don't need to pH anything. Are there other plants growing say withing 100yards of your cannabis plants? If so are they green and alive? They likely are so the soil is what it is and you can't change the pH easily if at all. The only thing you can do is temporarily change the soil pH. You don't have a way to test it properly anyway so focus on your humus that you are using for your plantings.
Suggest a lot more peat and a lot more EWC and/or Vermi-compost. You need a calcium source like fish bone meal, crab/crustacean meal, gypsum and oyster shell flour. All of these are sold at your local feed store (they likely feed them to the animals that you got the manure from).
IF you're growing outdoors do you have a compost pile (not manure or with green manure)?
Outdoor gardening is a lot more forgiving than in a container. It should be easier outside in the ground. Manure was likely your issue - too much of a good thing.