Quote:
Originally Posted by dianef
Sorry for the dumb question, but how do you measure and adjust the soil pH to be the best for bananas?
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Many of the inexpensive pH testers sold at nurseries and big box stores are designed for plants in containers; i.e., a commercial potting mix. In my experience they don't work very well in native soils or mixes you have made with native soils due to the effect of clays. If you are in the latter situation then I recommend obtaining a soil sample and sending it to a reputable lab for testing. There are several to choose from, this is the one I'm familiar with: A & L Labs -- search google for one in your region.
The pH to aim for is 6.1 to 6.3 -- unless you are growing hydroponically. The pH of soil is generally set by the pH of the irrigation water unless the soil is way outside the desired range. In the latter case, adjust the soil to the desired range -- and in all cases maintain the pH by fertigating with every watering.
Here's a guide I wrote awhile back:
Banana Cultivation In Non-Tropical Climates