Hesperis Purple (Sweet Rocket)

Hesperis matronalis 'Purple' Sweet Rocket / Dame's Violet 'Purple'

The classic violet-purple form of the great evening flower — tall 75–90cm branching stems clothed in loose clusters of four-petalled flowers in rich velvety violet-purple, releasing a powerful sweet violet-and-clove fragrance as darkness falls. Hesperis 'Purple' is the cottage garden classic that brings dusk-scented romance to shaded borders and serves as the preferred larval food plant for the Orange Tip butterfly.

This is the iconic form of Sweet Rocket — the variety that has filled English cottage gardens with evening fragrance for centuries. The rich vibrant violet-purple flowers are beautiful during the day but transform at dusk when the powerful sweet scent fills the surrounding air. The fragrance has a particular depth — violets and cloves combined — that few other plants can match, and the timing (evening release) is biologically tuned to attract night-flying moths. Hardy biennial (H7) following the two-year rhythm: rosette in Year 1, flowering glory in Year 2, then dies (but self-seeds reliably for permanent colonies). RHS Plants for Pollinators recognised. Preferred larval food plant for the Orange Tip butterfly — making 'Purple' Hesperis one of the most ecologically valuable plants in any wildlife cottage garden.

A note on growing

Sow direct outdoors May–July (or in modules indoors at 15–18°C). Cover seeds lightly with 3–5mm fine soil. Germination 14–21 days. Move plants to their final positions in October — partial shade or sun in moist humus-rich soil. Hesperis 'Purple' is genuinely most reliable in partial shade where soil moisture stays consistent through summer. The wild form grows along damp woodland edges and hedgerows — replicating these conditions in the garden gives the best results.

Cutting tip: cut when approximately one-quarter of the florets on each stem are open with the rest still in bud — the stem continues opening in the vase over several days. Re-cut stems at an angle and place immediately in deep water. Strip leaves below the waterline.

Self-seeding management: Hesperis self-seeds prolifically in suitable conditions — so prolifically that if allowed to set seed unrestricted in a small garden, it can become overwhelming. In small spaces, deadhead a proportion of plants after flowering to control spread. In larger gardens and woodland-edge plantings, let the colony establish naturally.

About Cabbage White caterpillars: as a Brassicaceae member, Hesperis can be targeted by Cabbage White butterfly caterpillars in late summer — check leaf undersides from July and hand-remove if needed.

Where it shines

In dusk-scented seating areas — plant near benches, patios or open windows where the evening fragrance can drift indoors. In shaded woodland borders. As a self-seeding informal colony plant. In wildlife gardens where the Orange Tip butterfly larval value is genuinely important. As a cut flower for romantic, slightly wild cottage arrangements.

Plant alongside

For the classical complementary colour pairing, combine 'Purple' Hesperis with Geum 'Lady Stratheden' (yellow) and Foxglove 'Primrose Yellow' — yellow and purple are complementary colours that intensify each other, and all three flower simultaneously in May–July. For an all-shade Brassica family combination, pair with Honesty (Lunaria) for the classic biennial partnership. For a "moon garden" pure-white-and-purple scheme, combine with Hesperis 'White'.

Delivery

The seeds will be dispatched direct to you by Bishy Barnabees. Please allow up to 5 days for delivery.

Delivery:

Delivery to mainland UK is calculated at checkout. For all other areas and large orders please ask for a quote. Orders will be sent by express next day delivery (DPD). They will be dispatched on a next working day service, with the exception of Ireland where it may take two days. Please allow up to 48 hours for delivery in the UK as the couriers may have already been and collected on the day you send your order in. Smaller orders for pouches, pockets, bags and pots may be sent via Royal Mail delivery. Please ensure you supply an email address and a mobile so you can be updated about your delivery. Should you have any problems with your delivery, please contact us at sales@naturalgrower.co.uk.

Special Deliveries

Saturday or weekday morning deliveries can be arranged, but there will be a surcharge. Please contact us to request a price for either of these delivery services. If you need a parcel sending outside of the UK, please contact us for a quote.

Returns:

If you are not completely happy with any product that you have ordered from us, you may return it to us in its original condition any time within 14 calendar days from the date of dispatch. Products must be returned in their original condition. Please contact us at sales@naturalgrower.co.uk to arrange a return. If you return a product by post, you will need to pay the costs of returning the product to us and obtain proof of posting.