Crown-pink
Silene coronaria · Dusty-miller · Mullein-pink · Rose Campion · Bloody William · Dusty Miller · Mullein PinkUSDA | Grow Zone
3-9Outdoors all year in zones 3 to 9. Anywhere colder, keep it as a houseplant.
- Light
- Full sun, 6-8 hours
- Water
- Every 1-2 weeks
- Humidity
- 40-60%
- Temperature
- 60-75°F
- Difficulty
- Beginner
- Growth
- Moderate
- Mature size
- 2-3 ft tall
Silene coronaria, commonly known as Crown-pink or Rose Campion, is a stunning perennial native to Europe. Its vibrant flowers attract pollinators, making it a favorite among gardeners.
Ask Vesper about Crown-pink
Ideal temperature
60-75°F is where it grows fastest.
Spacing and harvest
- Mature size
- 2-3 ft tall
- Plant apart
- 12-24 in
- Frost
- Hardy: survives frost
Everything it needs
9 essentials at a glance
Watering
Silene coronaria prefers moderately moist soil, requiring watering every 1-2 weeks depending on rainfall and temperature.
In hot, dry conditions, increase frequency to once a week. Signs of over-watering include yellowing leaves and root rot, while under-watering may cause wilting and browning leaf edges.
Light
This plant thrives in full sun, requiring at least 6-8 hours of direct sunlight daily.
It can tolerate partial shade but may produce fewer flowers. Ideal placement includes sunny borders or rock gardens where it can receive ample light.
Soil
Silene coronaria prefers well-draining soil with a pH range of 6.0 to 7.0.
A sandy loam or a mix of potting soil with sand or perlite is recommended to ensure good drainage and aeration.
Humidity
This plant enjoys average humidity levels, around 40-60%.
To increase humidity, mist the leaves or place a humidifier nearby. Signs of low humidity stress include leaf curling and browning tips.
Temperature
Ideal temperature range for Silene coronaria is 60-75°F (15-24°C).
It is hardy in USDA zones 3-9, tolerating cold down to -20°F (-29°C) and heat up to 90°F (32°C). During extreme temperatures, provide some shade or protection.
Fertilizing
Use a balanced fertilizer with an NPK ratio of 10-10-10, applying every 4-6 weeks during the growing season.
Reduce feeding in fall and winter. Signs of nutrient deficiency include stunted growth and pale leaves.
Pruning
Prune Silene coronaria after flowering to encourage bushier growth and remove any dead or damaged stems.
Use sharp, clean pruning shears for best results. Deadheading spent flowers can promote additional blooms.
Repotting
Repot Silene coronaria every 2-3 years or when it becomes root-bound.
Choose a pot 1-2 inches larger in diameter. Signs it needs repotting include roots growing out of drainage holes and reduced growth. Follow with fresh potting mix and water thoroughly.
Propagation
Propagation can be done through seeds or division.
For seeds, sow them in spring or fall, lightly covering them with soil. For division, carefully separate established clumps in early spring and replant them immediately. Ensure each division has roots and foliage.
When it's unhappy
Yellow leaves
Why it happens
Over-watering or poor drainage.
How to fix it
Ensure proper drainage and reduce watering frequency.
Wilting
Why it happens
Under-watering or extreme heat.
How to fix it
Water thoroughly and provide shade during peak heat.
Powdery mildew
Why it happens
High humidity and poor air circulation.
How to fix it
Improve air circulation and apply a fungicide if necessary.
Stunted growth
Why it happens
Nutrient deficiency or poor soil quality.
How to fix it
Fertilize with a balanced fertilizer and amend soil as needed.
Browning leaf edges
Why it happens
Low humidity or underwatering.
How to fix it
Increase humidity and ensure consistent watering.
Care through the year
Spring
In spring, prune back any dead stems and prepare for new growth. Fertilize with a balanced fertilizer to encourage blooming.
Summer
During summer, monitor soil moisture closely and water regularly. Deadhead spent flowers to promote continuous blooming.
Fall
In fall, reduce watering as the plant enters dormancy. Cut back the foliage after the first frost to prevent disease.
Winter
In winter, protect the plant from extreme cold by mulching around the base. Avoid over-watering during the dormant period.
Toxicity & Safety
Silene coronaria is considered non-toxic to pets and children. However, ingestion of large quantities may cause mild gastrointestinal upset. Always monitor for any unusual symptoms.
Good to know
Why are my Silene coronaria leaves turning yellow?
Yellow leaves on Silene coronaria are often a sign of over-watering or poor drainage. Check the soil moisture and adjust your watering schedule accordingly.
How often should I water my Crown-pink?
Water Silene coronaria every 1-2 weeks, allowing the top inch of soil to dry out between waterings. In hotter weather, you may need to water weekly.
What type of soil is best for Rose Campion?
Silene coronaria thrives in well-draining soil, ideally a sandy loam with a pH of 6.0 to 7.0. Adding sand or perlite can improve drainage.
Can I grow Dusty-miller in partial shade?
While Silene coronaria prefers full sun, it can tolerate partial shade. However, flowering may be reduced in lower light conditions.
How do I propagate Mullein-pink?
You can propagate Silene coronaria by seeds or division. Sow seeds in spring or fall, or divide established clumps in early spring.
What should I do if my Bloody William is wilting?
Wilting may indicate under-watering or extreme heat. Check the soil moisture and water thoroughly if it feels dry.
How do I prevent powdery mildew on my Silene coronaria?
To prevent powdery mildew, ensure good air circulation around the plant and avoid overhead watering. If it occurs, treat with a fungicide.
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