I know that PH is important for azaleas and blueberries, but most of the plants that I am interested in grow well in a wide range of PH readings. The honey locust that the city planted on the terrace creates shade that changes throughout the day. A light sensor that records readings and then loads them into my computer, wouldn't that be nice? The Easy Bloom does this. It is the only device I can find that does this. For less than I would spend on that cute little trellis I have been coveting. A probe that measures soil ph? They got those. For four hundred dollars!

So you can take a reading anywhere from 24 hours to three weeks? Will the recommendations change much after two days? a week? two weeks? I guess I don't want to tie up my sensor for three weeks UNLESS I get more refined recommendations.