Lowering Soil Ph: 'PH Dn' in water to desired PH or...?

Sphagnum peat moss is used to lower ph. Be careful. Good peat has a ph of less than 5.0. Dolomite is then often used to fix the ph after adding the peat.

 

If you have loose soil available, you can make a slurry with DI or distilled water and then test the pH of the slurry to give you soil pH. It doesn’t take much, maybe 1/4 cup or less of soil to 1 cup of Distilled water. That’s how I’ve always done it.

I use regular table vinegar to lower pH. My tap water is 9.3 and it takes roughly 4ml per gallon to get 6.5 pH. I’ve seen a chart showing lowering water pH is account for high pH soil. But having read the @Talkative post about sphagnum peat, compensating may not be necessary.

I’m not a soil pH expert (I’ve been around the garden and field for a while though) but don’t see any harm in simply running with pH down water to 6.5pH ish and carry on.

I fried my first batch of plants with tap water. They didn’t recover under my shit lights. Continued to grow yellow and contorted UNTIL I took them outside in the full sun (still pHing the tap water). One tomato plant looked worse that Charlie Brown’s Christmas tree! It was nothing but a shriveled stick, but fully recovered in full sun and yielded some fine fruit. I think grow wise, tomatoes can be a surrogate for MJ, I use them to test environment, soil, germination methods etc. where I don’t want to be testing high value seeds/ plants.

I just started doing MJ in April, so I’m nubiepottumus…..but my second grow is coming along pretty nice. Hope you recover quickly!

 

Most City tap water supplies run on the Alkaline side to protect Iron pipes in the System and in old homes.
My own runs a steady 8.5 PH. The good news is soil is self correcting and very forgiving of out of range water. It takes large amounts over a long time to really start to show in the plants..

I'm in a hot dry zone and use tons of water just to keep things alive. There is no way I can fuss with changing the PH of water and lugging it around the yard. It's all on hose water and I add sulfur dust to the soil mix to push it to the acidic side to help keep all that alkaline water from knocking things to far out of whack.

BNW

 

Yes. Add pH down to irrigation water and keep irrigating with that till you reach your desired pH.
I know places where acidic soil is needed and the soil pH fails to stay down, pH down is used with every irrigation pH’d to the desired range.