What to do this week: stake hollyhocks and shear geraniums Give late-flowering clematis a kick start with the application of a high-potash soluble fertiliser (e.g. tomato food). Patrol veg patch Nip off the tips of broad bean plants to stop blackfly. Earth up potatoes one more time. Sow cut-and-come-again salad leaves. Check rose diseases Remove yellowing lower leaves with black spot and bin them. Spray plants with Systhane Fungus Fighter.