PerennialsIn the landscape
Data sources
African Iris (Fortnight Lily)
Dietes iridioides
African Iris (Fortnight Lily) is a moderate-growing perennial, hardy in USDA zones 9-11, that matures to about 2–4 ft × 2–3 ft. It does best in full sun and part shade with medium water needs in well-drained soil. Expect blue, yellow and purple blooms in spring and fall. It stands up well to drought and grows happily in containers.
- USDA zones
- 9-11
- Sun
- Full sun, Part shade
- Water
- Medium
- Mature size
- 2–4 ft × 2–3 ft
- Growth rate
- Medium
- Maintenance
- Medium
- Soil
- Well-drained
- Bloom color
- Blue, Yellow, Purple, White
- Bloom season
- Spring, Fall
- Tough against
- Drought
- Native to
- Southern and eastern Africa
Freeze survival
Will it survive your winters?
We score African Iris (Fortnight Lily)’s freeze-trouble range against the real coldest nights your area has recorded.
Powered by ~35 years of daily lows from the nearest NOAA weather station. A risk read, not a guarantee — a sheltered spot or mature plant beats the odds.
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