Wood ash is also good to use to increase pH–you’ll need double the amount of wood ash that you would of lime. I like to take the cooled white ash from my woodstove and spread a thin layer over the garden in winter and incorporate it into the soil.
With lime you want to work into the top 5” of soil 2-3 months before planting as well. If you forgot to do that, you can put a handful of soft rock phosphate mixed with a little lime in with your plants when transplanting. We do this with all the plant rescue transplants. They love it.
If you want to reduce the pH you can add Sulphur. Cedar shavings will do the trick too. You want to have your soil tested at least every 2 years. You can get your own soil testing kit or bring it to the local extension service who will test it for you for a nominal fee.
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