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Echinacea purpurea 'Ruby Star' (Ruby Star Coneflower)
© Photo by David J. Stang, some rights reserved (CC-BY-SA) · Wikimedia Commons

Echinacea purpurea 'Ruby Star'

Ruby Star Coneflower

Garden selection; species {Echinacea purpurea} is native to eastern and central North America

At a Glance

HabitUpright
FoliageDeciduous
Height30-42 inches (75-105 cm)
Width18-24 inches (45-60 cm)
Maturity2 years

Growing Zones

USDA Hardiness Zones

3 - 9
These zones indicate the coldest temperatures this plant can typically survive.
What's my zone? →
Frost Tolerancehardy

Overview

Echinacea purpurea 'Ruby Star' (original German name 'Rubinstern') is a coneflower selection that grows 30–42 inches (75–105 cm) tall and 18–24 inches (45–60 cm) wide. Deep carmine-rose to ruby-red broad ray florets hold nearly horizontal rather than drooping, creating a flatter, more open flower face than the species type. The rays resist the downward droop that develops on many E. purpurea cultivars as the flower ages, maintaining the horizontal display through the life of each bloom. The carmine-rose color is deeper and more red-toned than the standard species pink, making this one of the darkest-colored species-type (non-hybrid) E. purpurea selections. A dark bronze-orange central cone contrasts with the deep rays. The cultivar was selected in Germany (Ernst Pagels nursery) and introduced under the German name 'Rubinstern'. Branching stems with rough-textured dark green foliage produce the standard E. purpurea growth habit. The bloom period from July through September spans approximately 8 weeks. Because this is a species selection rather than an interspecific hybrid, 'Ruby Star' has the full longevity and reliability of straight E. purpurea — typically 5–10 years in well-drained soil, longer than many hybrid coneflowers that decline after 2–3 years. Deer avoid the foliage.

Native Range

The species Echinacea purpurea is native to eastern and central North America. 'Ruby Star' ('Rubinstern') was selected by Ernst Pagels in Germany.

Suggested Uses

Used in perennial borders, prairie plantings, and pollinator gardens. The deeper color and horizontal rays create a bolder display than the standard species. The species-type longevity (5–10 years) makes this more reliable long-term than hybrid coneflowers. Container culture in pots of 5 gallons (19 liters) or more.

How to Identify

Identified by deep carmine-rose to ruby-red broad ray florets held nearly horizontal (non-drooping) around a dark bronze-orange cone. The horizontal ray angle and deep red tone are the key traits — deeper and more red than the standard species pink, and held flatter than most cultivars. A species selection (not interspecific hybrid), so it has the fibrous root system and branching habit of standard E. purpurea.

Appearance

Size & Dimensions

Height2'6" - 3'6"
Width/Spread1'6" - 2'

Reaches mature size in approximately 2 years

Colors

Flower Colors

Foliage Colors

Fall Foliage Colors

Bloom Information

Bloom Period

~8 weeks
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Flowering from July through September, approximately 8 weeks. Rays hold horizontal through the bloom lifespan. Deadheading extends the display.

Detailed Descriptions

Flower Description

Deep carmine-rose to ruby-red ray florets with a dark bronze-orange cone

Foliage Description

Dark green, ovate, rough-textured, coarsely toothed

Growing Conditions

Sun Requirements

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
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

Plant in full sun with at least 6 hours of direct light. Average, well-drained soil. Do not fertilize in rich soil. Water during establishment. Deadhead for extended bloom or leave cones for birds. Cut all stems to ground level in late winter.

Pruning

Deadhead or leave cones as desired. Cut all stems to ground level in late February–March.

Pruning Schedule

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fallearly spring

Maintenance Level

very low

Container Growing

✓ Suitable for container growing

Minimum container size: 5 gallons

⚠️ Toxicity Warning

Non-toxic