SuNutri
SuNutri
Purple Coneflower
Beginner

Purple Coneflower

Echinacea purpurea

Family: Asteraceae

Purple Coneflower is a striking native North American perennial prized for both its beauty and powerful immune-supporting properties. With vibrant purple-pink petals surrounding distinctive spiky orange-brown cones, this hardy plant has been used medicinally for centuries while attracting pollinators to the garden.

Days to Harvest

90-120 days

Sun Needs

Full Sun (6-8+ hours)

Water Needs

low

Germination Temp

70°F optimal

Seed Starting

Start Indoors

8 weeks before last frost

Germination

10-21 days

Seed Depth

1/4 inch

Light to Germinate

No

đź’ˇ Tip: Cold stratification dramatically improves germination. Mix seeds with moist sand in a plastic bag and refrigerate for 30 days before sowing. Seeds can also be sown in fall for natural stratification.

Growing Conditions

Soil Type

Well-draining soil, tolerates poor soil and drought once established

pH Range

6 - 7

Spacing

18-24 inches between plants for good air circulation

Companion Plants
âś“ Black-eyed Susanâś“ Bee Balmâś“ Yarrowâś“ Butterfly Weedâś“ Native Grasses

⚠️ Avoid planting near:

âś— Plants requiring rich, moist soilâś— Shade-loving plants
History & Nutrition

History

Echinacea purpurea, commonly known as Purple Coneflower, is indigenous to the central and eastern United States, where it thrived on prairies and open woodlands long before European settlement. Native American tribes, particularly the Great Plains nations including the Lakota, Cheyenne, and Comanche, recognized echinacea as one of their most versatile medicinal plants—using it to treat everything from snake bites and wounds to toothaches and infections. The Lakota people specifically used echinacea more than any other plant for medicinal purposes, chewing the root for pain relief and applying poultices to wounds. When European settlers arrived, they quickly adopted echinacea from indigenous healers, and by the late 1800s, it became one of the most popular medicines in America. Dr. H.C.F. Meyer, a patent medicine salesman from Nebraska, began promoting echinacea extracts in the 1870s, claiming it could cure snake bites—a claim he allegedly demonstrated by letting rattlesnakes bite him repeatedly while using echinacea as his only treatment. Though Meyer's claims were exaggerated, serious medical interest followed. Eclectic physicians (alternative practitioners of the era) championed echinacea, and by 1921, it was the most prescribed plant medicine in the United States. When antibiotics emerged in the 1940s, echinacea fell out of favor in America but found new life in Germany, where rigorous scientific studies began in the 1950s. German Commission E approved echinacea for treating colds, flu, and upper respiratory infections in 1994, reigniting American interest. Today, echinacea is one of the best-selling herbal supplements worldwide, with hundreds of scientific studies exploring its immune-modulating properties, though results remain mixed and debated in the medical community.

Nutritional Benefits

  • âś“Rich in antioxidants including flavonoids and rosmarinic acid
  • âś“Contains alkamides that support immune function
  • âś“Provides polysaccharides with immune-modulating effects
Climate & Temperature

Optimal Growing Temp

65°F - 80°F

Echinacea tolerates a wide range of temperatures. Native prairie plant adapted to heat and cold.

Survival Range

25°F - 95°F

Can survive these temperatures

very hardy
warm Season

Frost Note: Very cold hardy to zone 3. Dies back to ground in winter, regrows vigorously from roots in spring.

Best USDA Zones

Zone 3Zone 4Zone 5Zone 6Zone 7Zone 8Zone 9

Humidity

40-60%

Tolerates a wide range. Good drainage prevents root issues in humid climates.

Plant Size & Growth

Height

24-36 inches

Spread

18-24 inches

Growth Habit

clumping

perennialRoot Depth: Deep, thick taproot system (12-24 inches). Roots have medicinal value.
Growth Stages

Germination

10-21 days

Cold stratification improves germination. Seeds benefit from 4-6 weeks cold treatment.

Seedling Stage

Duration: 6-8 weeks

True leaves: Rough, hairy leaves emerge. Grow slowly first year.

Transplant ready: When 4-6 inches tall (10-12 weeks from sowing).

Vegetative Growth

Duration: First year focuses on root development

First-year plants produce foliage and roots but rarely flower. Second year and beyond produce flowers.

Flowering

Timing: Mid-summer to fall (year 2+)

Duration: 6-8 weeks

Large daisy-like flowers extremely attractive to bees and butterflies.

Harvest Maturity

Timing: 2-3 years for root harvest; flowers year 2+

  • Abundant flowering
  • Large root system
  • Self-sowing
Expected Yield

Per Plant

Multiple flowers per plant, plus roots for medicinal harvest after 3+ years.

Per Square Foot

1 plant per 2-3 square feet

Harvest Frequency

Harvest flowers as they bloom. Roots harvested in fall after 3+ years.

Factors Affecting Yield

  • •Full sun
  • •Well-draining soil
  • •Age—older plants more productive
Watering Guide

Seedling Stage

Keep moist until established.

Established Plants

Water when dry 2 inches deep. Every 5-7 days. Drought tolerant once established.

During Fruiting

Moderate water during flowering.

Preferred Method

Water deeply but infrequently.

Pro Tips

  • Drought tolerant—native to prairies
  • Good drainage essential
Fertilizing Guide
light feederRecommended: Low or balanced

Feeding Schedule

Spring

Light compost

Once annually

Organic Options

CompostAged manure

Light feeding only. Echinacea thrives in lean soil.

Container Growing
âś“ Suitable for containers

Minimum Size

12 inch pot

Recommended Size

14-18 inch pot

Depth Required

At least 14-18 inches for taproot

Best Varieties for Containers

All varieties suitable in large containers

Container Tips

  • Deep containers for taproot development
  • Well-draining soil
  • May need to transplant to ground for root harvest
Frequently Asked Questions

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