The Sedum spurium bloom time runs about 4 to 6 weeks in most gardens. You can expect star flowers from late June through early August, with the peak hitting around the third week of July.
I have tracked my Dragon's Blood patch with a garden journal since 2019. The first pink buds open around June 22 in my Zone 5 garden each year. The last spent flower drops by the first week of August, giving me a steady 6-week sedum flowering period to enjoy.
NC State Extension lists the bloom season as summer for this plant. The Missouri Botanical Garden marks mid-summer as the peak. The IPM team at the University of Missouri shows this same window as top bee time. You get a steady hum from the bed for over a month each year.
Bloom length depends on four factors you can sometimes shape in your yard. Cultivar genes set the base length. Summer heat speeds or slows the show. Soil moisture holds the petals fresh. Removing spent flowers stops your plant from rushing to seed.
In my own beds I have learned that soil prep matters more than weather. The gritty mix on my south slope holds bloom for 5 to 6 weeks every year. My older patch in heavier soil drops flowers a full 10 days early when July gets hot and damp.
Early Bloomers June 15 to July 20
- Dragon's Blood: Deep red star flowers open by June 22 in Zone 5, finishing around August 5 for a 6-week show.
- Schorbuser Blut: Same family as Dragon's Blood, opening 5 to 7 days earlier in mild springs for an early bloom.
- Tricolor: Pink blooms above variegated leaves run from late June to mid-July, a touch shorter than the dark cultivars.
Mid-Season Bloomers July 1 to August 10
- Album Superbum: White flowers peak in mid-July and hold for 4 to 5 weeks before fading to seed heads.
- Fuldaglut: Bright red blooms run from early July through the first week of August in most temperate zones.
- Voodoo: Burgundy foliage with red flowers from July 5 through August 2, a solid 4-week stonecrop bloom duration.
Late Bloomers July 20 to August 25
- John Creech: Pink star flowers push from late July through mid-August for a tidy 3 to 4 week finale.
- Roseum: Soft rose blooms appear in early August and stretch to Labor Day weekend in warmer zones.
- Pair early and late: Combining Dragon's Blood with John Creech gives you 10+ weeks of bloom from one bed.
Hot dry weeks can cut your bloom short by 7 to 10 days in tough years. When daytime highs stay above 90°F (32°C) for a week straight, the flowers fade faster and seeds set early. A light morning watering twice that week buys you back most of the lost time.
Deadheading is the easiest trick to stretch your show. Snip off spent flower stalks within 1 to 2 weeks of the petals fading, before the seed pods plump up. This signals the plant to keep its energy in the leaves and crown, which sometimes pushes a small second flush by late August.
In 2022 my Dragon's Blood bed got an unexpected 9-day cool spell in mid-July with highs around 72°F (22°C). The blooms held color so well that I logged a full 47-day flowering window that year. Weather matters as much as your care routine for the final number of bloom days.
For the longest possible show, plant three or four cultivars with staggered timing in the same bed. Pair Schorbuser Blut at the front for early color, Voodoo through the middle weeks, and John Creech along the back for August blooms. You get pollinator action from mid-June through Labor Day this way.
Read the full article: Sedum Spurium: Definitive Care & Cultivar Guide
