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HEMEROCALLIS 'Summer Interlude'

Image of Hemerocallis 'Summer Interlude'

Jesse Saylor

Family

Liliaceae

Botanical Name

HEMEROCALLIS 'Summer Interlude'

Plant Common Name

Daylily, Summer Interlude Daylily

Special Notice

This entry has yet to be reviewed and approved by L2G editors.

General Description

The daylily is a popular perennial revered for its reliability, ease of growth and floral beauty. Blooming in late mid-spring to very early summer (depending on climate), the hybrid diploid Summer Interlude daylily displays predominantly dark red flowers on tall stems called scapes. The throat in the flower is contrasting greenish yellow.

'Summer Interlude' was bred by D.F. Hall and introduced in the mid-1950s. The scapes rise from clumps of strappy green leaves that are die back in winter. Each blossom - comprising six petal-like tepals - in the bud cluster opens in the morning but shrivels up before reaching 16-hours old.

Daylilies are clump-forming and spread slowly via rhizomes. The blooms are commonly held in branched clusters on long leafless stems that stand above the foliage. All daylilies are easy to grow if provided full to partial sun and average soil with good drainage. Deciduous daylilies are the hardiest and survive in the coldest reaches of their range; however they may struggle in areas with mild winters. Evergreen types grow well in all but the most tropical regions but require protection where winters are harsh and cold. Their clumps spread over time and may need to be divided every three to four years. After plants bloom, it is wise to shear back their foliage to allow for a fresh flush of growth.

Enjoy this tried-and-true herbaceous ornamental in mixed beds and borders, containers and large mass plantings.

Characteristics

  • AHS Heat Zone

    9 - 2

  • USDA Hardiness Zone

    3 - 9

  • Sunset Zone

    1a, 1b, 2a, 2b, 3a, 3b, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24

  • Plant Type

    Perennial

  • Sun Exposure

    Full Sun, Partial Sun

  • Height

    18"-38" / 45.7cm - 96.5cm

  • Width

    20"-28" / 50.8cm - 71.1cm

  • Bloom Time

    Late Spring, Early Summer

  • Native To

    Hybrid Origin

Growing Conditions

  • Soil pH

    Acidic, Neutral, Alkaline

  • Soil Drainage

    Average

  • Soil type

    Clay, Loam, Sand

  • Tolerances

    Pollution, Drought, Salt

  • Growth Rate

    Fast

  • Water Requirements

    Average Water

  • Habit

    Clump-Forming

  • Seasonal Interest

    Spring, Summer

Ornamental Features

  • Flower Interest

    Showy

  • Flower Color

    Yellow Green, Dark Red

  • Flower Color Modifier

    Bicolor

  • Fruit Color

    Green, Brown

  • Foliage Color (Spring)

    Green, Light Green

  • Foliage Color (Summer)

    Green

  • Foliage Color (Fall)

    Green, Yellow Green

  • Fragrant Flowers

    No

  • Fragrant Fruit

    No

  • Fragrant Foliage

    No

  • Bark or Stem Fragrant

    No

  • Flower Petal Number

    Single

  • Repeat Bloomer

    No

  • Showy Fruit

    No

  • Edible Fruit

    No

  • Showy Foliage

    No

  • Foliage Texture

    Medium

  • Foliage Sheen

    Matte

  • Evergreen

    No

  • Showy Bark

    No

Special Characteristics

  • Usage

    Container, Foundation, Mixed Border

  • Sharp or Has Thorns

    No

  • Invasive

    No

  • Attracts

    Hummingbirds

  • Self-Sowing

    No