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Rubinstern (Ruby Star)

Family: Asteraceae Herb
Zone 6b Save Garden

Planting Schedule

Add Rubinstern (Ruby Star) to your garden to build a schedule and get reminders.

Rubinstern (Ruby Star) blooms with a radiant, ruby-red brilliance that seems to glow above sturdy, upright stems—petals that flare like a starburst and a bold, dark center that holds the gaze.

The flowers carry a firm, slightly velvety texture and a long-lasting presence in the garden, making them as satisfying in the landscape as they are in fresh bouquets. Grow Rubinstern for dependable summer color and a pollinator magnet that keeps visiting wings returning from bud to bloom.

Light: Full SunMaturity: 70 DaysHabit: Upright

Botanical illustration of Rubinstern (Ruby Star)

Planting schedules and alerts are optimized for Columbus (Zone 6b).

Crop Dates

MilestoneDate
Start IndoorsFeb 28th
Last FrostApr 25th
Transplant / Sow OutdoorsJun 6th
Harvest BeginsAug 15th
Harvest EndsOct 16th

Crop Details

TraitValue
Days to Maturity70
Sun RequirementsFull SunFull sun
Growth HabitUpright
Support NeededNone
Planting DepthNormal
Germination Temp (°F)70
Min Soil Temp (°F)60
Min Night Temp (°F)50
Harden Off (days)7

Frequently Asked Questions

What’s a common pest or disease on Echinacea purpurea (purple coneflower) and how can I fix it?
Echinacea purpurea is commonly affected by powdery mildew, especially in humid weather and when plants are crowded. Improve airflow by spacing plants and watering at the soil line (not the leaves), then spray with a labeled fungicide at the first signs of white powdery growth. Remove heavily infected leaves early to slow spread.
How often should I water Echinacea purpurea during its main growing phase?
During active growth (after plants establish and before flowering), keep soil evenly moist but not soggy—aim for watering about 1 inch per week total, split into 1–2 deep waterings if needed. Let the top 1–2 inches of soil dry between waterings to prevent root stress and reduce mildew risk. Once established, it will tolerate some dryness, but consistent moisture helps it form strong stems and flowers.
How do I know when to harvest or cut back Echinacea purpurea (Ruby Star) at the right time?
For cut flowers, harvest when the ray petals (the pink-purple “daisy” petals) are fully open and the central cone is firm and visibly developed, typically around 70 days from sowing. For seed, leave the flower heads until the cones turn dark and crisp and seeds start to loosen—then cut heads and finish drying indoors. Deadhead spent blooms to encourage additional flowering, cutting back to just above a healthy leaf set.

Today's Conditions

Outdoor planting for Rubinstern (Ruby Star) in Zone 6b typically begins around 2026-06-06. Wait until soil reaches at least 60°F before transplanting Rubinstern (Ruby Star).

Garden Alerts

In Zone 6b, the average last spring frost is around April 25. Watch soil temperature before transplanting Rubinstern (Ruby Star).

Today's Conditions

Outdoor planting for Rubinstern (Ruby Star) in Zone 6b typically begins around 2026-06-06. Wait until soil reaches at least 60°F before transplanting Rubinstern (Ruby Star).

Garden Alerts

In Zone 6b, the average last spring frost is around April 25. Watch soil temperature before transplanting Rubinstern (Ruby Star).

Sowing Tips

Transplant Conditions

Wait until soil reaches 60°F and nights stay above 50°F before moving outdoors. Harden off for 7 days first.

Expert Note

For best results, stratify seeds (cold treatment) before sowing and transplant only after nights are reliably warm to prevent stunting.