Middendorff's Daylily Plant Care
Hemerocallis middendorffii Trautv. & C.A.Mey.
Updated · Sources · How we source care data
Hemerocallis middendorffii, known as Amur daylily, is a plant species in the subfamily Hemerocallidoideae of the family Asphodelaceae of the order Asparagales. It is native to the Russian Far East, northwest China, Korea, and Japan.
Every 7–10 days
Full sun to partial shade
60–85°F
40–70%
At a glance
How do you care for Middendorff's Daylily?
Water Middendorff's Daylily every 7–10 days, letting the top layer of soil dry out between waterings, and give it full sun to partial shade. It prefers temperatures of 60–85°F (16–29°C) and 40–70% humidity. Fertilize it every 6 months during the growing season. It is reported as toxic to pets, so keep it out of reach of pets.
Where Is the Middendorff's Daylily Native To?
What Is the Middendorff's Daylily?
Middendorff's Daylily (Hemerocallis middendorffii) belongs to the Asphodelaceae family within the Hemerocallis genus. Middendorff's Daylily is native to the Russian Far East, northwest China, Korea, and Japan. Middendorff's Daylily is also known as Yellow Daylily.
Middendorff's Daylily displays a clumping perennial growth habit, reaching up to 2 ft tall with a spread of approximately 1.5 ft. Middendorff's Daylily produces large, trumpet-shaped flowers in various colors.
Leaf size: approximately 18 inches.
How Often Should You Water a Middendorff's Daylily?
Hemerocallis middendorffii requires watering every 7–10 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.
Watering Frequency
Every 7–10 days
Let soil partially dry between waterings
What Light Does the Middendorff's Daylily Need?
Middendorff's Daylily thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Temperature and Humidity Does the Middendorff's Daylily Prefer?
Hemerocallis middendorffii grows best at temperatures of 60–85°F. Middendorff's Daylily prefers humidity levels of 40–70%.
Temperature
60–85°F
Humidity
40–70%
What Soil Mix Works Best for a Middendorff's Daylily?
Well-draining, fertile soil with organic matter. Good drainage is essential for Middendorff's Daylily to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Middendorff's Daylily?
Feed Middendorff's Daylily every 6 months during the growing season (spring and summer) with a balanced fertilizer diluted to the strength on the label.
Pause feeding in autumn and winter, when growth slows, and never fertilize dry soil — water first.
Fertilizing
Every 6 months
During the growing season
The PlantoScan app can remind you when to water and when to fertilize each plant.
How Do You Repot a Middendorff's Daylily?
Divide and repot every 3-5 years in early spring. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.
How Do You Propagate a Middendorff's Daylily?
Middendorff's Daylily can be propagated through division, seeds. Similar propagation techniques also apply to daylily plant care, which shares the same genus.
Is the Middendorff's Daylily Toxic to Pets and Children?
Toxic (caution)
Reported as toxic in our plant data. Not verified by the ASPCA.
This is a general caution, not veterinary or medical advice. If your pet ate a plant, contact your vet or animal poison control.
See all plants toxic to cats and plants toxic to dogs.
What Pests and Diseases Affect the Middendorff's Daylily?
Middendorff's Daylily is susceptible to aphids, spider mites, thrips. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.
Yellow leaves, brown tips or drooping? See common plant problems and how to fix them.
What USDA Hardiness Zone Does the Middendorff's Daylily Need?
Middendorff's Daylily grows outdoors in USDA Zone 13a. It survives winters down to planting zone 13a. Middendorff's Daylily is native to the Russian Far East, northwest China, Korea, and Japan. In cooler regions, grow Middendorff's Daylily as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 13a
Keep exploring plants
Middendorff's Daylily is one of many species covered in the complete plant care and identification guide, which groups plants by genus, attribute, and popularity.
It belongs to the Hemerocallis genus — compare its care with other Hemerocallis species on PlantoScan.
Hemerocallis is part of the Asphodelaceae plant family — browse all Asphodelaceae genera and species.
Middendorff's Daylily thrives in bright light and direct sun — see other bright-light plants.
More Hemerocallis Species
Other Hemerocallis species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
Sources
- Scientific name & taxonomy: Hemerocallis middendorffii Trautv. & C.A.Mey., family Asphodelaceae (first published in Reise Sibir. 1(2; 3): 94 (1856)) — World Flora Online record, IPNI name record.
- Pet toxicity: Middendorff's Daylily is reported as toxic to pets in our plant data (not verified by the ASPCA), so treat it with caution. Checked against the ASPCA plant list; any other toxicity note on this page comes from PlantoScan's plant database.
- Hardiness zone: USDA Zone 13a, calculated from the plant's minimum temperature.
- Care values(watering, light, temperature, humidity, soil, fertilizing): PlantoScan's plant database, filtered by automatic plausibility checks — values that fail them are hidden. How we source and check plant data.
Spotted a mistake? Email info@upvision.media with the page link — we check and correct reported errors.
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