Strawflower Helichrysum Swiss Giant Mix

Helichrysum bracteatum 'Swiss Giant Mix' (syn. Xerochrysum bracteatum) Strawflower 'Swiss Giant Mix'

If you only grow one flower for drying, make it this one. The 'Swiss Giant' strain is the gold standard — tall sturdy 90–100cm stems topped with massive fully-double flowers up to 6cm across in a vibrant sunset palette of fiery scarlet, tangerine orange, golden yellow, hot pink and pure white. The papery bracts feel crisp and dry while the plant is still growing, and retain their intense colour for years after harvesting.

This is genuinely the king of dried flowers. The 'Swiss Giant' strain produces massive fully-double blooms in the full sunset palette — fiery scarlet, tangerine orange, golden yellow, hot pink and pure white — on tall sturdy stems reaching 90–100cm. The magic of this plant lies in its texture: the petals are actually modified leaves (technically called "bracts") that feel crisp and papery even while growing in the garden. Because they are naturally dry, they retain their shape and intense colour for years after harvesting, making them the essential ingredient for winter wreaths, buttonholes and everlasting bouquets. The substantial fully-double form creates rounded bold flower heads that command attention in any arrangement. Half-hardy annual. Flowers July to October. RHS Plants for Pollinators — when left on the plant, the large yellow centres provide rich nectar.

Fun fact: Helichrysum flowers are "hygroscopic" — they react to moisture in the air, opening in dry conditions and closing in humid or wet weather. This evolutionary mechanism (designed to protect the developing seeds from rain damage) means a dried Helichrysum bouquet in a damp room will gradually close, then re-open in dry conditions. Properly preserved dried specimens retain this responsiveness for years.

A note on growing

Half-hardy annual that needs warmth to get started and won't survive frost. Because 'Swiss Giants' are tall (up to 1 metre), they need a long growing season to reach full potential — indoor sowing is essential.

Sow indoors February–April at 18–22°C. Surface-press onto moist compost, cover only with a fine dusting of vermiculite (light needed for germination). Germination 7–14 days. Pot on as seedlings develop. Harden off thoroughly before planting out only after all frost risk (late May/June).

Plant in full sun in well-drained soil. Helichrysum prefers slightly lean conditions — rich fed soil produces lush foliage and fewer flowers. Install support early (canes or netting framework) while plants are young — by the time the 1m stems are tall enough to need support, the plant is too brittle to stake without damage. Water consistently while establishing, then water deeply but infrequently once established (slightly dry conditions actually produce more intensely-coloured flowers).

Harvest timing: cut when buds are half-open — Helichrysum continues to open as it dries. If you pick fully-open flowers, they may turn inside-out or brown. Strip leaves, bundle in small groups (8–10 stems), and hang upside-down in a warm dark dry place for 2 weeks. Darkness keeps the intense colours from fading.

Where it shines

In the dried-flower cutting garden as the essential focal-point everlasting — Helichrysum 'Swiss Giant' is the bold dramatic centrepiece that anchors any dried arrangement. In cottage borders for vivid sunset colour throughout late summer. As wedding flowers — dried buttonholes and small bouquets retain their colour beautifully for keepsake bouquets. In Christmas wreaths and winter dried displays. In wildlife gardens for pollinator value during the flowering stage. We grow Helichrysum 'Swiss Giant' specifically for our dried flower range here at Salle Moor Hall Farm — it's among the most reliable and most valuable varieties in the everlasting cutting garden.

Plant alongside

The classic dried-flower combination: pair Helichrysum 'Swiss Giant' with Statice 'Hipster Mixed' — Statice provides the colourful filler, Helichrysum provides the bold focal point; both demand the same sunny dry conditions and harvest at the same time. For geometric contrast, combine with Scabiosa 'Drumstick' — the large colourful Helichrysum discs look incredible next to the architectural bronze spheres of the drumstick Scabious. With Strawflower 'Helipterum Roseum Mixed' for matching everlasting-flower harvesting season but contrasting scale and character (large bold Helichrysum focal points against delicate small Helipterum fillers).