In article , Jonathan
Culver writes
Which vegetables thrive in heavy soil?

It's the second year of planting in this patch.
I had success with potatoes (Wilja) Spinach and French Beans lasy year
but a poor show of onions and as for the radishes!

Radishes should be fine. Try sowing them single 1 inch apart, and early
in the year. They like a steady supply of water.

I grow them in my clay soil - they crop reliably for me and need no
attention at all after sowing.
--
Kay Easton

Edward's earthworm page:
http://www.scarboro.demon.co.uk/edward/index.htm