🌸 Spirea
Spiraea spp.
The 'plant it and forget it' flowering shrub — until you forget to prune it and it eats the mailbox.
Sun
Full sun for best bloom, 6+ hrs
Days to harvest
N/A — ornamental; blooms second year
Spacing
3–5 feet apart
Soil pH
6.0–7.0, adaptable
How to grow
Plant in fall or spring in average soil — spirea is famously unfussy. It wants a real winter dormancy, so it's happiest north of Florida; Panhandle gardeners can try it, peninsula gardeners should pick something else. Prune spring-bloomers right after flowering, summer-bloomers in late winter.
Water & feeding
Water to establish; mature plants handle drought better than soggy soil.
Common problems
- Aphids on tender spring growth
- Powdery mildew in crowded, humid plantings
- Florida: lack of chill means weak bloom; heat stress in zone 9+
Harvest
Deadhead spent flower clusters to trigger rebloom on summer-flowering types. Every few years, cut the whole thing to 6 inches in late winter for a full reset — it comes back stronger.
Nerdy fact: Aspirin's ancestor grew on a spirea relative — salicylic acid was first isolated from meadowsweet, once classified as Spiraea, and the 'spir' in aspirin nods to it.