1. Mottisfont, Hampshire
Everything at Mottisfont is quite literally coming up roses. This National Trust property is home to a world-famous walled rose garden that comes to life from June in a heady riot of fragrance and colour. There are thousands of varieties on display, from pre-1900 old-fashioned blooms to delicate Chinese tea roses. Unlike modern species, these roses only bloom once a year, so head there in summer to catch them in the act. Borders of just-as-sweet peonies, geraniums, lilies, phlox and climbing clematis complete the floral fantasia.
Getting here: 2hr drive from London. Or 1hr 51min train from Waterloo to Mottisfont & Dunbridge station via Southampton.
£19-£21, £9.50-£10.50 concs. Find out more at nationaltrust.org.uk.