How to Grow
Strawflower 'Helipterum Roseum' Mixed from Seed
The delicate Victorian paper daisy -- Half-Hardy Annual H2 producing dainty daisy-like 3–4cm blooms in soft blush-pink, rose-pink and pure white with golden or dark centres on 40–50cm stems; tissue-thin papery bracts feel crinkly even while growing; the refined companion to Helichrysum; harvest when 2–4 outer bract layers unfold (before fully open); hang to dry; surface press/light; 18–21°C; 7–15 days; March–April indoor; full sun; free-draining soil; pollen-rich centres for bees and hoverflies
Helipterum roseum (also sold as Acroclinium roseum and botanically now Rhodanthe roseum) is the "other strawflower" -- the plant that is regularly listed alongside Helichrysum bracteatum in seed catalogues under the same "everlasting flower" or "strawflower" category, but that is a completely different plant with a completely different character, scale and aesthetic. Where Helichrysum Swiss Giant is bold, large, and sunset-saturated -- a vivid, striking focal point -- Helipterum roseum is refined, small, and softly pink: a delicate daisy-like flower whose tissue-thin, almost translucent blush-pink and rose-pink bracts carry what is called Victorian appeal, reminiscent of pressed flower collections and traditional crafts.
The difference between the two is not merely one of degree -- it is one of character. Helichrysum provides impact; Helipterum provides charm. In a dried flower arrangement, the two plants together provide everything: the bold vivid focal point of Helichrysum against the delicate Victorian filler quality of Helipterum, combined with the airy texture of Statice, creates the full vocabulary of the everlasting arrangement. Growing all three from seed in the same cutting garden bed provides a self-sufficient dried flower production system that requires no specialist equipment beyond string and a dry, ventilated space.
Quick Facts at a Glance
Plant Type
Half-Hardy Annual H2 -- the delicate Victorian paper daisy; different from Helichrysum
Flowers
Soft blush-pink, rose-pink and white daisy-like blooms 3–4cm; tissue-thin papery bracts
Not Helichrysum
Different genus; finer, more delicate, shorter (40–50cm); Victorian cottage charm
Harvest timing
When 2–4 outer layers of petals unfold but before fully open; hang to dry
Pollinator
Centres packed with accessible pollen -- vital feeding station for bees and hoverflies
Difficulty
2 out of 5 -- needs a warm indoor start and good drainage; otherwise very easy
Understanding the Paper Daisy
Not Helichrysum -- The Key Distinction
Helipterum roseum (synonyms: Acroclinium roseum, Rhodanthe roseum) is sold as a "strawflower" alongside Helichrysum bracteatum, but the two plants are entirely different in character, scale and aesthetic. Helichrysum is bold, large, fully-double, and sunset-hued -- the vivid focal point of everlasting arrangements. Helipterum roseum is refined, small, daisy-like, and softly pink -- the delicate filler that provides the "Victorian charm" and "paper daisy" quality that makes everlasting flower arrangements feel feminine and nostalgic rather than vivid and bold. The two plants complement each other in dried arrangements where bold and delicate, vivid and pale, large and small are placed together; growing both from seed provides the full spectrum from focal point to filler.
Tissue-Thin Papery Bracts -- Already Dry While Growing
Like Helichrysum, Helipterum roseum produces modified bracts rather than conventional petals: the petals are actually naturally dry modified bracts rather than moisture-filled petals. The flowers feel dry and crinkly even while growing. This structural property -- the bracts being inherently papery rather than water-filled -- is what gives all everlasting flowers their unique durability and why they can be dried simply by hanging rather than requiring specialist preservation techniques. Understanding this structural difference from conventional flowers helps explain why Helipterum dried arrangements can last for years without significant colour loss.
Harvest When Bottom 2–4 Layers of Petals Have Unfolded
The Helipterum harvest window differs slightly from Helichrysum. Where Helichrysum should be harvested at half-open bud stage (before the centre reveals itself), Helipterum roseum can be harvested slightly later: when the bottom 2–4 layers of the radiating bracts have unfolded and the flower is clearly displaying its colour and form, but before the flower has fully expanded to its maximum open disc. At this stage, cut with 20–25cm of stem, strip lower leaves, and hang in small loose bunches in a warm, dark, well-ventilated space for 2 weeks.
Sowing & Growing On
Sow Indoors March–April at 18–21°C; Surface Press (Light Needed); 7–15 Days -- Plant Late May at 20–25cm -- Full Sun -- Free-Draining -- Harvest When 2–4 Outer Bracts Unfolded
Surface sow March–April at 18–21°C, pressing lightly without covering (light aids germination). Germination 7–15 days. Plant out late May at 20–25cm in full sun with free-draining soil. Harvest when bottom 2–4 layers of outer bracts have unfolded but before fully open. Bundle and hang upside down to dry.
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Sow March–April at 18–21°C on the surface of moist compost -- press gently and do not cover. Light aids germination. Germination 7–15 days at 18–21°C. Helipterum seedlings are delicate -- handle with care when pricking out, by the seed leaf rather than the stem. Grow on in good light at 15–18°C. The plants develop their characteristic slender, grey-green stems relatively quickly.
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Harden off and plant out in late May at 20–25cm spacing in full sun with excellent drainage. Helipterum roseum is a half-hardy annual (H2) -- it is sensitive to frost and should not be planted out until all frost risk has passed and the soil has warmed. Full sun is essential for the best flower production. As with Helichrysum, free-draining soil strongly preferred; heavy clay with standing water reduces performance significantly.
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Provide support if needed in exposed positions. At 40–50cm, Helipterum roseum is much shorter than Helichrysum Swiss Giant and generally supports itself in sheltered garden positions. In exposed or windy positions, thin twiggy pea sticks inserted around the plants early in the season help maintain the upright habit that makes cutting easier and the display more attractive.
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Harvest when 2–4 outer bract layers have unfolded, before the flower is fully open. Cut with 20–25cm of stem. Strip lower leaves immediately. Bundle loosely in small bunches (8–10 stems maximum). Hang upside down in a warm, dark, well-ventilated space for 2 weeks. Once dry, the delicate paper-thin bracts are stable and long-lasting. Handle gently -- the finer structure of Helipterum is more fragile than Helichrysum when fully dried.
Growing On & Care
Victorian Charm -- The Aesthetic
Victorian appeal, reminiscent of pressed flower collections and traditional crafts. The flowers have a specific quality of romantic delicacy -- the tissue-thin blush-pink and rose-pink bracts are almost translucent, and the small 3–4cm disc is perfectly proportioned in a way that feels botanical-illustration precise. In a dried arrangement, Helipterum provides the "I pressed these flowers between the pages of a book" quality that no other commonly-grown dried flower achieves quite as naturally. Its nostalgia value in a contemporary arrangement is exactly right.
Pollinator Value -- Pollen-Rich Centres
The centres are packed with accessible pollen, acting as a vital feeding station for solitary bees and hoverflies during the peak of summer. Unlike Helichrysum whose large closed bud structure somewhat limits pollinator access, Helipterum roseum's open daisy structure provides immediate, accessible pollen to the widest range of pollinator species -- bees, hoverflies, butterflies, and beetles all visit freely. Growing Helipterum roseum provides both a beautiful dried flower resource and a genuine contribution to garden biodiversity throughout its summer flowering season.
In Dried Arrangements -- The Delicate Filler
The scale difference between Helipterum roseum (3–4cm blooms) and Helichrysum Swiss Giant (5–7cm blooms) makes them natural companions in dried arrangements: the larger Helichrysum heads provide the bold focal points while the smaller Helipterum heads fill the space between them with a more delicate, airy quality. Mixing both in the same arrangement creates the contrast of scale and density that professional dried flower designers use to produce arrangements with visual depth -- the eye moves between the solid, vivid Helichrysum heads and the delicate, translucent Helipterum discs without either dominating or disappearing.
Succession Sowing for Extended Season
Individual Helipterum roseum plants flower for approximately 8–10 weeks from first bud to exhaustion. For an extended cutting and drying season, sow in two batches: a main March–April indoor sowing for July–August flowers, and a second late-April direct sowing (or direct sow after last frost in May) for August–October flowers. The succession provides a longer window of fresh cutting material and ensures that dried stock from the first harvest can be supplemented with fresh material from the second sowing before the season ends.
In Fresh Summer Arrangements
Helipterum roseum is also a beautiful and long-lasting fresh cut flower (vase life 7–10 days) that provides the delicate pink daisy element in summer arrangements. Cut when flowers are three-quarters open, condition in deep water for 4 hours, and use in mixed arrangements with other summer-cut flowers. The fresh flowers have a crinkled, papery quality even when alive that provides textural interest alongside smoother-petalled flowers like Cosmos or Scabiosa. Fresh arrangements of Helipterum in a simple glass vase are reminiscent of cottage garden posies collected from a Victorian cutting border.
Name Confusion -- Acroclinium, Rhodanthe, Helipterum
This plant appears in seed catalogues under three different names depending on the taxonomic classification used: Helipterum roseum is the older name; Acroclinium roseum is frequently used in UK seed trade; Rhodanthe roseum is the currently accepted botanical name. All refer to the same plant. The Bishy listing uses Helipterum roseum. The Bishy growing blog refers to it as Acroclinium. In seed catalogues and florist supplier lists it may appear under any of the three names, or as "paper daisy" or "rose everlasting." Any of these names in a seed catalogue refers to the same pink-and-white paper daisy grown here.
Sowing & Harvest Calendar
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| Sow indoors (Mar–Apr; surface; 18–21°C) |
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| Plant out (late May; full sun; free-draining) |
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| Flowers and harvest (Jul–Sep; 2–4 outer bracts unfolded) |
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| Dried material available (from Aug onwards) |
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Common Problems & Solutions
| Problem | Likely Cause | What to Do |
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| Poor germination | Temperature below 18°C; seeds covered | Surface press only -- light aids germination. Maintain 18–21°C consistently. Below 18°C germination is slow and unreliable. |
| Plants leggy and weak; few flowers | Insufficient light after germination; rich soil | Grow on in the brightest available position from emergence. Helipterum roseum needs good light throughout development. Avoid over-rich soil -- moderate fertility produces the best-proportioned plants. |
| Flowers shattering when dried | Harvested too late -- flowers fully open | Harvest when 2–4 outer bract layers have unfolded but the centre is still partially closed. The more open the flower when harvested, the more fragile the dried result. |
| Plants collapsing in wet conditions | Overwatered; waterlogged soil; heavy clay | Free-draining soil is essential. Add horticultural grit to clay. Water sparingly once established -- Helipterum roseum is significantly more drought-tolerant than it appears. |
Plant Specifications
The paper daisy with Victorian charm -- delicate, translucent, blush-pink, and holding its colour in dried arrangements for years
Sow March–April on the surface at 18–21°C (light required; 7–15 days). Plant out late May at 20–25cm in full sun with free-draining soil. Harvest when the bottom 2–4 outer bract layers have unfolded but before the flower is fully open. Bundle loosely and hang upside down in a dark, warm, ventilated space for 2 weeks. The blush-pink and rose-pink paper daisies hold their colour for years in dried arrangements.
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