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How to Grow Helichrysum –Strawflower

Strawflower
Strawflower, Helichrysum bracteatum

Helichrysum–commonly called strawflower–bears daisy-like flowerheads with papery, white, yellow, or pink bracts and central yellow corollas. The flowers are nearly stalkless growing above broad lance-shaped hairy leaves.

Some species of Helichrysum are grown to be cut and dried as “everlasting flowers. They are often included in floral arrangements. Others are grown for their silvery, gray foliage, not their flowers.

There are about 500 species in the Helichrysum genus. Species include annuals, perennials, and subshrubs.

Licorice plant, Helichrysum petiolare,
Licorice plant, Helichrysum petiolare, is grown for its silevery-gray foliage.

Get to Know Helichrysum

  • Plant type: Annual or tender perennial
  • Growing Zones and range: Annuals in all zones; perennial in Zones 8 (wich mulch protection) to 11; start plants indoors in Zones 3 to 5.
  • Hardiness: Tender perennial
  • Height and width: 12 to 48 inches (30-123cm) tall; 6 to 10 inches (15-25cm)wide
  • Foliage: Alternate leaves on hairy stems are alternate, sometimes opposite, or in basal rosettes.
  • Flowers: Daisy-like flower heads with central discs and strawlike pointed petals; blooms have dry, straw-like texture colors include orange, pink, red, white, bronze, and purple
  • Bloom time: Mid- through late summer
  • Uses: cutting and drying, bedding
  • Common name: Strawflower
  • Botanical name: Helichrysum bracteatum
  • Family: Asteraceae
  • Origin: Widely distributed in Europe, Asia, and Africa

Where to Plant Helichrysum

  • Plant Helichrysum in full sun.
  • Helichrysum grows in average to humus-rich, well-drained; strawflower will grow in alkaline soil.
  • Helichrysum prefers a soil pH of 6.5 to 7.5.
  • Helichrysum thrives in dry areas and on hillsides.

Helichrysum Uses

  • Tall varieties of Helichrysum offer a colorful accent; they are best planted at the back of a garden.
  • Dwarf Helichrysum provides bright colors for a rock garden.
  • The papery flowers of Helichrysum hold their color indefinitely when dried. (To dry, pick flowers that are fully open; hang them upside down in a shady spot.)
  • Helichrysum is beautiful in fresh arrangements.
Strawflower, Helichrysum
Strawflower, Helichrysum bracteatum

When to Plant Helichrysum

  • Set Helichrysum in the garden in spring after the last frost has passed.
  • Start seed indoors 8 weeks before the last frost in spring.
  • Sow seed outdoors 2 weeks before to 2 weeks after the last frost ins spring.
  • In Zones10 and 11, sow seed in late autumn for blooms the next spring.

Planting and Spacing Helichrysum

  • Sow seeds by pressing them into sterile seed starting mix indoors or in evenly prepared soil outdoors.
  • Keep seed at 60° to 70°F (15.6°-21°C); seeds will germinate in about 10 days.
  • Grow young plants in bright light or below a fluorescent light until plants are 4 to 6 inches (10-15cm) tall.
  • Space Helichrysum 6 to 10 inches (15-25cm) apart in the garden.

How to Water and Feed Helichrysum

  • Helichrysum needs light watering; keep the soil evenly moist.
  • Mature plants are drought tolerant.
  • Helichrysum need only light fertilizing if at all; fertilize with an all-purpose fertilizer early in the growing season.

Helichrysum Care

  • Long-stemmed varieties need staking or they will flop.
  • Mulch around plants in dry regions to conserve soil moisture.
  • Pinch back growth tips to keep plants bushy.
  • Protect Helichrysum in winter by mulching with chopped leaves or straw.
  • Harvest flowers for drying before they are fully open; hang them upside down in long-stemmed bunches to dry.

Helichrysum Pests and Diseases

  • Helichrysum are susceptible to aster yellows virus and aphids.
Curry plant, Helichrysum italicum
Curry plant, Helichrysum italicum

Helichrysum Propagation

  • Helichrysum is propagated by seed; they easily self sow.
  • Seeds germinate in 7 to 10 days at 70° to 75°F (21°-24°C).
  • Perennial Helichrysum can be propagated from cuttings taken in summer or by division in spring.

Helichrysum Varieties to Grow

  • Helichrysum bracteatum, strawflower: Annual grows 24 to 36 inches (61-91cm) tall with many flower heads; pompon-like summer flower to 2 inches across are papery and last indefinitely when dried; flowers may be yellow, orange, red, pink, or white; dwarf cultivars also available;
  • H. italicum, curry plant: Perennial; spreading stems to 24 inches (61cm) tall and wide; narrow, nearly white leaves to more than 1 inch long; leaves emit a strong fragrance of curry powder when bruised; small bright yellow flowers in clusters 2 inches across.
  • H. petiolare, licorice plant: Perennial with trailing stems to 4 feet (1.2M0 long; white, woolly, inch-long leaves; insignificant flowers; cultivar ‘Limelight’ has light chartreuse leaves, ‘Variegatum’ has leaves with white markings.

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