The moist, sheltered environment of shady spots is perfect for growing lush, leafy foliage. Annual and perpetual spinach, spring cabbage, rocket, lettuce, claytonia, lamb’s lettuce – all can be sown in April. Fruit, too, can be abundant in shade. Those with tarter flavours can be planted now. Red, white and pink currants, gooseberries, morello cherries, cane and groundcover raspberries, rhubarb, blackberries and blackcurrants yield well in shady spots, and many can be wall-trained.…