Chalky, Sandy, Clay: The Best Plants For Every Type Of Soil
To count as a “clay” soil, the earth has to contain 25% or more clay particles. These are fertile, but drain slowly and can be compacted quite easily; they take a long time to warm up, and may “bake” in summer. They get sticky when wet.
Article source: https://www.huffingtonpost.co.uk/entry/best-plants-every-soil_uk_69c2655be4b0591e52ce2919