Sweet & Sour Soil
It's important to find out which type your soil is
so that you can determine what plants (indoor and
outdoor) can be grown in it.
Soil scientists have devised a simple scale to
describe whether soil is alkaline (sweet) or acid
(sour). The pH scale, as it is called, runs from 1 to 14. Anything above 7.0 is
alkaline, anything below is acid. A soil which registers 7.0 is neutral,
or equally balanced between acidity and alkalinity.
Nearly all plants, with a few exceptions, prefer a neutral (or just under) pH
soil. Plants will not prosper in acid soil below 4.0 or in alkaline soil
above 9.0.
You can "sweeten" up acid soil by adding agricultural lime and increase
acidity by mixing in peat moss or leaf mould.

|