Hello
Yep, I agree with potatoes. Grew them in one are a few years ago and
the soil is still better than the rest of my small garden.
Also, sand. I added layer over the whole area, then just raked it in;
no digging.
(The king eds tasted great).
I'm experimenting with chipped wood bark. Keeps the weeds down and
starts to "compost" after a year. So far, so good.

AJ
Staffs.