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Wisteria frutescens 'Longwood Purple'

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Wisteria frutescens 'Longwood Purple'

This specific cultivar of Wisteria frutescens, known as 'Longwood Purple', has a delayed blooming period during which short but plentiful racemes (10-20cm) emerge in mid-June. The scented blossoms display a blue-purple and white hue with an eye that can vary from green to yellow. The leaves initially have a light green colouration and gradually transition to a vibrant green before shedding in autumn.

Caution: This plant is harmful if ingested.

Flowering time: May - June

Height: 5m

Frequently Asked Questions

When is the best time to plant wisteria in the UK?

Autumn or spring are both suitable, as long as the soil isn’t frozen or waterlogged. Planting in autumn often helps roots settle before the next growing season.

How often should I prune wisteria for reliable flowering?

Most gardeners prune twice: once after flowering in summer, then again in late summer to keep shoots tidy and encourage flower buds for next year. Regular pruning also helps control spread and keeps it manageable on walls and trellis supports.

Why isn’t my wisteria flowering yet?

Common causes include too much shade, over-feeding, or the plant still getting established, especially in its early years. Also check whether it’s grafted (often flowers sooner) or grown from seed (can take much longer to bloom).

Will frost damage wisteria in winter?

Wisteria is generally hardy, but late frosts can sometimes nip young shoots or buds in early spring. A sheltered position and avoiding overly early soft growth (from high feeding) helps reduce risk.

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