Last year I commenced a three year rotation plan in my raised beds. The ground was not used for veg before and was covered in docks with some nettles spread between them indicating quite an acid soil. In the first year of crop rotation my kale did well, cabbage less so, and swede not good at all. So I decided to lime the brassica bed this year (the bed was used for peas and beans last year) but due to exam commitments, I've left it pretty late. My question is, after liming, how long must I wait before I can sow turnips and/or plant all other brassicas.
I hear a lot about not using tanalised timber in raised beds where vegetables will be growing. My question is, is it safe to use tanalised timber for raised vegetable beds and if not can I make it safe by seperating it from the soil with polythene or another non permeable membrane? Thanks