In article , martin
writes

If you really want to grow organic you need to get the soil checked to
ensure that it's not full of the previous user's chemicals.

That is obligatory for commercial growers wishing to sell food labelled
as organic for public consumption.
Recreational gardeners wishing to grow crops organically for their own
use can do so without tests.
Guidelines for recreational organic gardening are available from HDRA
at: www.hdra.org.uk
--
Alan & Joan Gould - North Lincs.