King Size Frosted Sulfur Strawflower is a towering cultivar of Xerochrysum bracteatum that commands attention in any garden with its substantial blooms and extended flowering season. From seed to first bloom takes roughly 84 days, rewarding patient gardeners with flowers that last from June through November. These frost-tolerant plants reach 24 to 42 inches tall with a spread of 12 to 18 inches, thriving in full sun with moderate water once established. The 'Frosted Sulfur' coloring and 'King Size' designation suggest blooms of impressive scale and distinctive pale yellow tones that capture the garden's warmth through the cooler months.
Full Sun
Moderate
9-11
42in H x 18in W
—
High
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These strawflowers emerge as architectural specimens in the summer border, their papery blooms holding color and form long after many annuals have faded. The drought tolerance means once they're established, you can largely step back and let them thrive, a trait that endears them to low-maintenance gardeners and those in drier climates. Pollinators flock to the open flowers, turning your patch into a hub of activity. The extended bloom window, six full months from early summer to late autumn, makes them reliable performers for cutting and dried flower work.
These strawflowers are prized as cut flowers and for dried arrangements, where their papery texture and sturdy stems make them last far longer than typical annuals. The substantial bloom size and pale coloring lend themselves to both fresh and dried bouquets, providing summer-through-fall color in indoor settings.
No timeline data available yet for this variety.
Sow seeds indoors 6 to 8 weeks before your last frost date. Keep soil temperature at 70 to 75°F for germination. Seeds require light to germinate, so surface sow and firm lightly rather than covering. Expect sprouting in 7 to 21 days. Transplant outdoors after hardening off once frost danger has passed.
Harden off seedlings over 7 to 10 days by gradually exposing them to outdoor conditions. Transplant to garden soil enriched with 2 inches of compost after your last frost date has passed and nighttime temperatures remain above freezing. Space plants according to your desired mature width of 12 to 18 inches.
Direct sow seeds outdoors at or after your last frost date. Surface sow and firm seeds lightly into the soil; they require light to germinate. Thin seedlings as they grow to achieve proper spacing.
Cut flowers when the papery bracts (the colorful outer layers) are fully open and the central button feels firm, typically mid-bloom. For dried arrangements, harvest when blooms are at full maturity and all petals have opened. Strip lower foliage from stems before drying. Cutting spent blooms encourages more flowers to form throughout the season.
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