Monty Don shows you how to cut a tender tree dahlia (Dahlia imperialis) down to size in autumn, so it can be dug up and brought indoors over winter. Watch this short video from Gardeners’ World for full details.
How to protect a tree dahlia over winter
Find out how to care for a tree dahlia over winter, with the help of Monty's video guide.
Offers
Save on a selected range of beautiful irises at Crocus. These tall-stemmed flowers make a striking addition to a mixed border. Included are the pictured varieties 'Jane Phillips', 'Sultan's Palace' and 'Superstition'.
Use code: GWIRIS
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Enjoy an exclusive day out on 20 September, 2018, travelling by luxurious, private train from London to Chatsworth, one of England's finest stately homes. Guests will receive gourmet food hampers and a free goody bag, with tickets costing £385pp.
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Visit the beautiful Isles of Scilly and Tresco Abbey Gardens on a four-day trip on 13-16 October, 2018. Enjoy a talk and Q&A session on Mediterranean planting, and a garden tour from Tresco Abbey Garden's Mike Nelhams.
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