The taste of tiny, tender new potatoes need not be restricted to summer. With a little bit of skill and good timing, they can also be grown for autumn and winter harvests, meaning you could enjoy them at Christmas.
How to grow potatoes indoors for Christmas harvests
Use a container at least 30cm (12in) deep and wide, with drainage holes in the base (specialist potato-growing containers are also available)
Add a layer of potting compost or garden soil mixed with garden compost or well-rotted manure. A layer 10cm (4in) thick is sufficient for 30cm (12in) deep pots, but larger containers can be half-filled. Plant one to three tubers per pot, each with about 30cm (12in) of space, and cover with 15cm (6in) of compost or soil. As the foliage develops, earth up the potatoes with further compost or soil until the container is full to within 5cm (2in) of the top. Leave a lip to aid watering. Keep well-watered and feed with a general-purpose liquid fertiliser. Ensure the greenhouse remains frost-free as the season progresses, as potato foliage would be damaged by frost. The foliage will yellow and die down in late autumn and can then be removed and composted. Tubers can be left in their pots in compost (kept fairly dry) until needed at Christmas
How to grow potatoes outdoors for Christmas harvests
Follow instructions for growing potatoes, including planting them in a trench and earthing them up as they begin to grow
Take measures to protect against potato blight and slugs. Once foliage dies down in September or October, remove and compost it
On light soils in a sheltered garden, piling some earth up over the row where you know the potatoes are and covering it with straw to insulate tubers may be sufficient protection to store them in the ground until Christmas
In cold areas, or where soils are wet and heavy, it is better to lift tubers by the end of October and re-bury them in coarse sand or soil in a frost-free place (such as a garden shed) until you need them
Lifting and storing potatoes in the fridge, or in bags in a cool shed, is possible but will cause the skins to harden and the desirable, delicate 'new-potato' flavour and texture will be lost.