Start using water that has a PH of around 6-6.5 until the soils Ph begins to come down and then continue watering with a PH of 6.5-6.8. 7 is high but not insanely high
Thanks for the input.
Thing is, I use rain water from a rain barrel.
It usually has a ph of 6. The plants are in two and a half gallons of soil in three and a half gallon containers. Last night I flushed two gallons of it through and it came out 7 ph.
I added 3ml cal/mag and 3ml EM1 to another gallon. It ph'd 4.5. It came out at over 7 ph also.
Not sure I want to try it, but I just read on
www.marijuanagrowing.com that watering with diluted leftover coffee can help?
Here is the info I just read.
"Adding organic matter is an indirect method of soil pH adjustment. Organic matter “buffers” soil, especially sandy soil.
The higher the organic matter content of a soil, the more lime it takes to raise the soil pH 1 point, and the more sulfur it takes to lower the soil pH 1 point.
Plants grown in soil with a lot of organic matter have healthier roots. They’re able to extract enough nutrients from the soil even when the pH isn’t optimal. In a healthy soil with adequate organic matter, changing soil pH may not be necessary, because plants continue to grow at pH levels that would stunt growth in leaner soils. When you increase soil organic matter, you’re not really changing soil pH, you’re increasing your plants’ tolerance for acidic or alkaline conditions.
Soil pH can be lowered by half a point—from 7.0 to 6.5, for example—by increasing soil nitrogen. Adding compost, manure, or organic soil amendments like alfalfa meal to the soil can help drop pH over time by increasing bacterial populations. Organic nitrogen fertilizers can be used to lower soil pH by small amounts.
There's a myth that coffee grounds (2-0-0) are a quick fix for lowering soil pH. Most of the organic acids in coffee are water-soluble, and flush out into the brew. Coffee grounds have a pH around 6.8, close to neutral, so they won't do much to lower pH. They do add a little nitrogen, so they can help reduce pH over time, just like manure or compost.
If you need to drop soil pH more quickly, try watering your plants with leftover (cold) coffee, diluted 50-50 with water. This works especially well for houseplants and container vegetables.
To lower soil pH by larger amounts (more than half a point), use Elemental Sulfur, sometimes called “Flowers of Sulfur”. When using sulfur for changing soil pH, be aware that the acidifying effect depends on soil bacteria (thiobacillius), which oxidize the sulfur and release dilute sulfuric acid into the soil over a period of weeks to months."
Here is a couple pics. You can see the yellowing in some of the leaves.
But the flower stills looks good.
