I decided to try and grow container blueberries. I used the pine bark and peat moss mix. Then I did something stupid. I added well rotted composted manure to the mix.
I bought one of those cheap Chinese ph soil probes and was disappointed when it never registered any PH level at all. I figured it was just broken. Weeks go by and the plants keep looking worse and worse.
One day I decided to dip the PH probe into some vinegar and all of a sudden it was no longer broken. (it was never actually broken) I realized that my PH was probably over 7 and the blueberries were probably goners.
If they are going to die anyway I will try a hail Mary. I read about people directly using battery acid to adjust the PH of the soil. I would need so much acid that I would probably fry the roots. I decided to remix the potting soil instead.
I removed the plants then I dumped all of the potting soil into a wheel barrow. I mixed about a cup of battery acid into 5 gallons of water and mixed that into the soil in the wheel barrow. After mixing it for 20 minutes the ph meter reads pH5. I repotted the very sad looking blueberries and will report back if they survive or die in the next month. I wonder if the acid was able to neutralize all of the basic buffer material in that 20-30 minutes or will my ph go back up.
Battery acid seems like a pretty awesome idea for general gardening not just blueberries. I might use a moderate amount in the areas I wish to plant soon to pull my ph down below 7, I can use sulfur to keep the ph below 7.
Has anyone else ever used large amounts of battery acid to prepare soil before planting?