If you’re lucky enough to live in a cool climate (I never thought I would say that!), you can plant peonies now. Peonies need a certain amount of chilling before they bloom, so they’re not suited to warm areas. They won’t produce for about three years, but once they do they’ll continue blooming for years.
Peonies thrive in rich, free-draining soil in full sun. Do not plant them too deeply. The growing eyes should sit about 5cm below the soil surface. If you plant them too deeply they simply won’t flower. Keep them away from other plants as far as possible (at least 1m) and clear away any weeds. A general garden fertiliser given once a year in spring is ideal, but choose one that’s not so high in nitrogen otherwise plants may become more susceptible to fungal diseases. A potato fertiliser is ideal; it’s high in phosphate and potassium and low in nitrogen.