Garden Scheme

Plant library  ·  Perennial Flowers

Daylily

Hemerocallis spp.

Daylily is a tough, clumping perennial that brings trumpet-shaped blooms to borders from early summer into late summer. Reaching about 2½ feet tall and 2 feet wide, it makes a substantial mid-border presence without becoming a shrub-like screen. Use its repeatable clump form to give long beds a clear rhythm, especially where lower edging plants need a taller backdrop.

  • Pollinator friendly
Sunlight Full Sun
Water Moderate
USDA zones 3–9
Spacing 1.5 ft
Mature size 2.5 ft tall, 2 ft wide
Bloom Early summer - late summer

Placement and use

Set daylilies along sunny borders, on slopes, or in broad mass plantings where their foliage can read as a repeated band rather than a single isolated tuft. A 2½-foot height suits the middle of a mixed bed, behind low groundcovers and in front of taller flowering perennials or shrubs. Keep the planting far enough back from a path that the 2-foot-wide clumps do not lean into circulation space as they fill out. Their sturdy flower stems do not need staking, so they work well in open planting drifts and along walkways.[1][2]

Spacing and mature footprint

Plant daylilies 18 inches apart, center to center, for a closely planted display. Each mature clump can reach about 2 feet wide, so allow the group to become visually continuous rather than reserving a separate 2-foot gap around every plant. At the outside edge of a bed, leave enough open soil or mulch to define the planting line and preserve access for dividing or resetting clumps later.

Three plants set 1.5 ft apart, center to center; shaded circles show the 2 ft mature spread.

Sun, water, and soil

Place daylilies in full sun and plan for moderate water rather than a dry, neglected strip. Use a bed with drainage that does not remain waterlogged, and reserve the brightest positions for the strongest flowering display. In a large border, group plants with other moderate-water perennials so irrigation can be managed as one zone.[1][2]

Seasonal notes

Flowers appear from early summer through late summer, while individual blooms are brief and replaced in succession. Give the foliage room to remain part of the bed after any one flower fades; it is better used as a continuing clump than hidden behind a dense front row. Position later-interest plants nearby if the border needs a stronger finish beyond the bloom period.[1][2]

Planning caveats

Do not rely on daylily as a deer-resistant component of a planting plan. Where deer browsing is common, avoid making it the only plant carrying the border’s summer color or using a narrow run of daylilies as a highly visible edge along a path or drive.

Growing facts

Botanical name
Hemerocallis spp.
Type
Perennial
Category
Perennial Flowers
Lifecycle
perennial
USDA hardiness zones
3–9
Sunlight
Full Sun
Water
Moderate
Plant spacing
1.5 ft
Mature size
2.5 ft tall, 2 ft wide
Bloom season
Early summer - late summer
Pollinator friendly
Yes
Deer resistant
No
Native to North America
No

References

  1. Hemerocallis (Day Lilies, Daylily, Day Lily) — North Carolina Extension Gardener Plant Toolbox
  2. How to grow hemerocallis — Royal Horticultural Society

Editorial content updated 2026-07-20.