Botanical Name: Hemerocallis 'Joan Senior'
Common Name: Joan Senior Daylily  
Plant photo of: Hemerocallis 'Joan Senior'
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Water Saving Tip:

Replace turf with groundcovers, trees, and shrubs. If you have areas where no one uses the grass, patches that do not grow well, or a turf area too small to water without runoff, consider replacing the turf with water-efficient landscaping.

  • Anatomy

  • Culture

  • Design

Plant Type

Ground cover, Perennial


Height Range



Flower Color



Flower Season

Spring, Summer


Leaf Color



Bark Color



Fruit Color



Fruit Season



Full, Half





Growth Rate



Soil Type

Sandy, Clay, Loam, Rocky, Unparticular


Soil Condition

Average, Rich, Poor, Well-drained, Dry


Soil pH

Acid, Neutral, Basic


Adverse Factors


Design Styles

English Cottage, Formal, Japanese, Mediterranean, Ranch, Seascape, Tropical


Accenting Features

Showy Flowers, Unusual Foliage


Seasonal Interest

Spring, Summer


Location Uses

Entry, Perennial Border, Shrub Border, Foundation, Parking Strip, Patio, Parking Lot, Raised Planter, Walkways, With Rocks


Special Uses

Container, Erosion Control, Mass Planting, Naturalizing, Small Spaces


Attracts Wildlife


Information by: Stephanie Duer
  • Description

  • Notes

'Joan Senior' is a nearly white daylily, growing about 25 inches tall. It is a early-mid bloomer, and repeat bloomer. All daylilies have grass-like, green foliage that grows in clumps; fall color is yellow. Use at the front of shrub or foundation borders, in perennial gardens, or along paths. They are also great for those areas that get little care, such as the sides of garages, along the alley or driveway.
Grow in well drained soil in full sun to a little shade. The ideal soil is a loam-sand or clay-loam soil, though daylilies are very adaptive. Avoid overhead watering, as that can cause spots on the flowers, or cause them to wilt. As flowers along the scape are spent, you can break them off to keep a tidier appearance, or simply remove the entire scape after flowering is completed. Remove old foliage and any remaining scapes in late winter to early spring, as new foliage emerges. Very heat tolerant. Though moderately drought tolerant, adequate watering during the spring when buds are forming is essential to vigorous summer flowering. Daylilies are discribed as being early-, mid-, or late bloomers and refers to when they bloom compared to other daylilies. Generally, daylily season is June through August, so early is usually around June, mid is July, and late is August. 'Rebloomers' usually have a primery bloom, followed by intermittant blooming the remainder of the season.