"..........How am I supposed to tell if my soil is "well drained" or not?
..........."

Dig a hole 12 inches square and about 15 inches deep pour in 1 or 2 buckets
full of water and time how long it takes to drain away.
The faster it drains the better your drainage.

--
David Hill
Abacus nurseries
www.abacus-nurseries.co.uk