Korean and Russian Far Eastern species daylily with rich golden-orange clusters of unspotted flowers held above shorter grassy foliage. Among the hardiest daylilies, flowering reliably in cold-winter gardens.
Hardiness ratings
| System | Rating | Temperature range | How to read it |
|---|---|---|---|
| USDA hardiness zone | Zone 3–8 | −40 °C to −6.7 °C | Plant tolerates down to this zone |
| RHS hardiness rating | H7 | down to −20 °C | Plant needs at least this level of cold tolerance |
| Canadian plant hardiness zone | Zone 3–8 | −34 °C to −1 °C | Plant tolerates down to this zone |
| Australian (ANBG) zone | Zone 2–5 | −10 °C to 10 °C | Plant tolerates down to this zone |
Growing notes
- Plant in cold-winter herbaceous borders — flowers May–June, one of the earliest daylilies of the season
- Edible flower buds and petals — used in East Asian vegetarian cooking and salad garnish
- Among the cold-hardiest daylilies in cultivation — succeeds well into USDA zone 3
- Distinct from the Stella de Oro and orange ditch daylilies already in the database — H. middendorffii is earlier flowering and far cold-hardier
Pet caution: Middendorf daylily is listed as potentially harmful to cats and/or dogs. Keep pets from grazing on it, and contact a vet if you suspect your animal has eaten some.
Categories
Related plants
Cross-check Middendorf daylily against your zones