What to do in your garden for the week. Vegetables Think ahead to next spring and improve the quality of heavy, clay-based soil by digging it roughly, so different levels are exposed to winter frosts, winds, rain and sun. Raw manure can be added also and will break down over winter. Any potatoes still in the garden should be lifted and stored. April is the traditional month to sow broad beans. These ultra-tough vegetables will germinate at very low temperatures and although they may make little growth over winter, will grow strongly in spring to produce better crops. The long-pod varieties generally have heavier crops. Some gardeners also sow peas at this time, with favoured variety Onward, which has a long maturity period (97 days). The dwarf variety, Novella, needs no staking and matures in 63 to 77 days. Cabbage and cauliflower plants can be set in soil that has been well-manured or generously composted to stand the winter and mature in spring.…