Wisteria sinensis 'Caroline'
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The compact racemes of Wisteria sinensis 'Caroline' bloom with blue-mauve and white flowers in early May. These flowers, with a yellow centre, measure 20-40cm in length and carry a delicate fragrance that is irresistible to bees. The foliage of this deciduous plant begins as pale green, turning deep green in maturity before transitioning to a bright yellow in the autumn.
Flowering time: May - June
Height: 6m
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.
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.
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).
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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