What hardiness zones is Echinacea 'Kim's Knee High' suitable for?

Echinacea 'Kim's Knee High' is a compact mounding herbaceous perennial in the aster family (Asteraceae) reaching 18–24 inches (45–60 cm) tall with a spread of 18–24 inches (45–60 cm) — approximately half the height of standard E. purpurea cultivars that reach 36–48 inches (90–120 cm). This cultivar carries single daisy-like flower heads 3–4 inches (8–10 cm) across with slightly drooping rosy-pink to mauve-pink ray florets surrounding a prominent dark copper-orange central cone. Flower heads open on sturdy branching stems from July through September. Basal foliage is dark green, coarsely textured, and lance-shaped, forming a dense mound beneath the flowering stems. Growth rate is moderate. The compact 18–24 inch mature height reduces the flopping and staking problems common with taller Echinacea cultivars, which positions this selection for front-of-border use where standard coneflowers would overwhelm the composition. Named for plantsman Kim Hawks of Niche Gardens in North Carolina. Hardy to zone 4.

Native Range

Echinacea 'Kim's Knee High' is a selection of garden origin, likely derived from E. purpurea and possibly carrying E. tennesseensis parentage. The parent species E. purpurea is native to eastern and central North America, where it occurs in prairies, open woodlands, and meadows.

Suggested Uses

Grown in borders, prairie gardens, and cottage gardens at 18–24 inch (45–60 cm) spacing. The compact 18–24 inch mature size eliminates the need for staking and suits smaller gardens and front-of-border positions where standard E. purpurea cultivars at 36–48 inches would dominate the bed. Container culture works in 3 gallon (11 L) or larger pots. Dark cones carry goldfinches and other seed-eating birds into winter when spent flower heads are left standing. Pairing with ornamental grasses, Rudbeckia, and Perovskia builds a prairie-style summer composition on matching sun and drainage requirements. Full-shade positions and waterlogged soils are not suitable given the full-sun and well-drained requirements.

How to Identify

Separated from standard E. purpurea cultivars ('Magnus', 'Bravado', 'Leuchtstern') by the much shorter mature stature at 18–24 inches (versus 36–48 inches for standard purpurea selections); the flower form, color range, and cone architecture match the species type. Separated from Rudbeckia by the prominent raised spiny central cone (versus the smaller rounded cone of Rudbeckia) and by the slightly drooping ray florets (versus the flat or reflexed rays of Rudbeckia). A compact knee-high coneflower carrying rosy-pink drooping rays and a dark copper-orange cone confirms identification.

Appearance

Size & Dimensions

Height1'6" - 2'

Width/Spread1'6" - 2'

Reaches mature size in approximately 2 years

Colors

Flower Colors

pink

Foliage Colors

green

Fall Foliage Colors

no change

Bloom Information

Bloom Period

~9 weeks

Summer Fall

Single daisy-like flower heads 3–4 inches (8–10 cm) across with rosy-pink to mauve-pink drooping ray florets and dark copper-orange central cones open in July–September. Bloom duration is 8–10 weeks. Deadheading extends the bloom window; leaving the spent cones standing into fall carries winter seed for goldfinches and other seed-eating birds into the cold-season garden.

Detailed Descriptions

Flower Description

Rosy-pink to mauve-pink drooping ray florets surrounding dark copper-orange spiny central cone; 3-4 inches across

Foliage Description

Dark green, coarsely textured, lance-shaped in basal mound

Growing Conditions

Sun Requirements

Full Sun

Requires 6-10 hours of direct sunlight daily

• Full Sun: 6+ hours of direct sunlight

• Partial Shade: 3-6 hours of direct sunlight

• Full Shade: Less than 3 hours of direct sunlight

Soil Requirements

pH Range6.0 - 7.5(Neutral)

357912

Soil Types

loam clay sand

Drainagewell drained

Water & Climate

Water Needs

Low

Frost Tolerance

hardy

Time to Maturity

1-2 years

Drought Tolerance

Drought tolerant when established

Care & Maintenance

Care Guide

Grows in full sun in well-drained soil at pH 6.0–7.5, tolerating loam, clay, and sand. Hardy to zone 4. Tolerates heat, drought, humidity, and poor soils once established, which positions this cultivar for lean-soil borders and prairie-style plantings where richer soils produce weak flop-prone stems. Full-sun positions produce the sturdiest growth and the most compact mounding form. Dividing the clump every 3–4 years maintains vigor; older undivided plants decline in flower count and stem sturdiness. No serious pest or disease problems. Japanese beetles can feed on flower heads in heavy-pressure summers, and aster yellows disease can occasionally distort flower structure in wet springs.

Pruning

Deadheading spent flowers extends the bloom window, or the dark cones are left standing through winter for bird seed and architectural interest. All stems are cut back to the ground in late winter (February) before new growth begins.

Pruning Schedule

winter

Maintenance Level

very low

Container Growing

✓ Suitable for container growing

Minimum container size: 3 gallons

⚠️ Toxicity Warning

Non-toxic