Climate matters. This page is a practical baseline. Confirm cultivar, local frost/heat conditions, mature size and regional restrictions before planting.
Strawflower — Growing reference
| Scientific name | Xerochrysum bracteatum |
|---|---|
| Seed germination (days) | 5–10 |
| Soil temperature for germination (°C) | 21.1–23.9 |
| First harvest or flowering (days) | 65–90 |
| Measured from | Transplant |
| Plant spacing (cm) | 22.9–30.5 |
| Mature height (cm) | 45.7–91.4 |
| Mature spread (cm) | 20.3–30.5 |
| USDA hardiness zones | 3–11 |
| Light | Full sun |
| Water | Low |
| Sowing method | indoor-start |
Growing directions
Sow seed on the surface of moist starting mix and press lightly — light aids germination, so barely cover seed. Strawflowers tolerate drought and poor soils remarkably well. For drying, harvest stems when the central button of each head is still closed, before the outer bracts fully open; they will continue to open as they dry. Deadhead garden plants regularly to maintain continuous bloom.
Source and local conditions
Typical planning ranges from OpenPlantDB (CC0). Cultivar, climate, season and growing method can change these values. Confirm the seed label and local guidance before planting.
Source & verification
OpenPlantDB · CC0