Growing Guide
plant thumbnail

Daylily, Purple Mountain

Herbaceous Perennial Flower

Also known as Tsu-kin-shan Daylily
Hemerocallis altissima
Liliaceae Family

The tallest of all daylily species, Purple Mountain Daylily can reach up to 6 feet tall when in blooms, but is only hardy to Zone 6. It is a nocturnal bloomer, its flowers opening at dusk and closing by dawn in warmer weather. In colder weather, the flowers open in late afternoon and remain open until midmorning.

Site Characteristics
  • full sun
  • part shade

Soil conditions:

  • requires well-drained soil

Hardiness zones:

  • 6 to 9
Plant Traits

Lifecycle: perennial

Ease-of-care: easy

Height: 4 to 6 feet

Spread: 3 to 4 feet

Bloom time:

  • late summer
  • early fall

Flower color: yellow

Lily-like flowers with long, trumpet tubes and narrow, slightly recurving petals.

Foliage color: medium green

Foliage texture: medium


  • cushion, mound or clump
  • grass-like

Shape in flower: flower stalks with upright spikes

Flowers borne on tall, erect, branching scapes that rise above the foliage.

Special Considerations
Special characteristics:
  • non-aggressive
  • non-invasive
  • not native to North America - Native of China, from Purple Mountains in Nanking Province.
  • fragrant
Special uses:
  • naturalistic garden
Growing Information
How to plant:

Propagate by division or separation - Divide in spring or autumn.

Maintenance and care:
Remove faded flowers.

More growing information: How to Grow Perennials