Roses 'Semiplena' (Rosa × alba 'Semiplena')

Roses 'Semiplena'

Roses 'Semiplena' is a spectacular rose with grey-green foliage and fragrant white semi-double flowers. It is a sport of the 'Alba Maxima' rose and was thought to be the White Rose of York in the War of the Roses. The name comes from the Latin word for 'half full.'

Scientific classification

Roses, elms, figs, and allies

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1.5 m to 1.8 m

Spread

Green

Leaf Color

5 cm to 8 cm

Flower Size

White

Flower Color

Deciduous

Leaf type

0 - 38 ℃

Ideal Temperature

Care Guide for Roses 'Semiplena'

Twice per week

Water

Full sun

Sunlight

0 - 38 ℃

Ideal Temperature

Water: Roses 'Semiplena' prefers moist, well-drained soil and should be watered when the surface is slightly dry. During drought, water every 2-3 days. Avoid water-logging, especially in winter, and do not splash water on leaves. Water more from budding to flowering, then reduce frequency post-bloom.

Fertilize: Roses 'Semiplena' thrives in fertile soil, requiring several light fertilizer applications throughout the growing season. Use liquid fertilizer biweekly in spring and summer, and slow-release types bi-monthly. For fresh-cut flowers, fertilize weekly, and use Mycorrhizal fungi to enhance nutrient absorption.

Pruning: Roses 'Semiplena' features semi-double white flowers and vigorous growth. Prune in early spring by removing dead wood and shaping for air circulation. Cut back old stems to promote new growth, aligning with roses 'Semiplena''s cycle for optimal blooming and enhancing health and flowering potential.

Propagation: Roses 'Semiplena' can be propagated through grafting, division, and cuttings. Grafting is done late summer to early autumn using multiflora rose as rootstock. Division occurs in spring or autumn by separating ramets. Cuttings taken in spring and autumn yield 70-80% success with proper substrate and humidity.

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