Plant : Maltese Cross, Jerusalem Cross
Silene chalcedonica
Lychnis chalcedonica, known as the Maltese or Jerusalem Cross, is a bold summer bloomer featuring dense clusters of scarlet-red cross-shaped flowers atop upright, sturdy stems. Growing up to 4 ft tall, it’s a garden standout that adds bright, long-lasting color to borders, cutting gardens, and cottage-style plantings.
Plant Care Essentials:
Light Requirements
Full sun to part shade
Water Scheduling
Moderate
Growth Habit
Moderate
Temperature
Hardy in USDA zones 3–9
Plant Profile:
- Scientific Name:
- Silene chalcedonica
- Family:
- Caryophyllaceae
- Plant Type:
- Ornamental herbaceous perennial
- Origin:
- Eastern Europe through western Asia and parts of Siberia
- Size:
- 90–120cm
- Growth Rate:
- Moderate
- Light Requirements:
- Full sun to part shade
- Watering Needs:
- Moderate
- Temperature Tolerance:
- Hardy in USDA zones 3–9
- Maintenance:
- Low
- Flower Color:
- Bright scarlet-red
- Flowering Season:
- Early to late summer
- Drought Tolerant:
- No
- Tropical:
- No
- Indoor:
- No
- Has Fruits:
- Yes
- Edible Fruit:
- No
- Poisonous to Pets:
- No
Care Instructions:
This perennial forms a robust mound of mid-green, lance-shaped leaves in early summer. Flower stems rise tall and rigid, each bearing clusters of densely packed blossoms roughly 4 in (10 cm) across. The dazzling scarlet blooms are irresistible to bees, butterflies, and hummingbirds, and make excellent cut flowers. Stems may need staking in rich soils or windy spots.
Light
Plant in full sun for best flowering—ideally 6+ hours daily. Light afternoon shade is tolerated but too much shade causes leggy, sparse bloom.
Water
Keep soil evenly moist during the growing season. Young plants need regular watering; mature clumps tolerate short dry periods. Avoid waterlogging.
Soil
Thrives in moist, fertile, well-drained soils including loam, clay, or sandy types. Improve drainage or enrich poor soil with compost.
Temperature
Well-suited to moderate temperate climates. Hardy down to USDA zone 3; tidy and blooms best in cooler summer conditions.
Humidity
Moderate humidity is fine; avoid high humidity and dampness during winter, which may promote rot.
Fertilizer
Feed lightly in spring with compost or slow-release balanced fertilizer. Avoid high nitrogen to maintain strong stems and blooms.
Best Placement Ideas
- Back or center of bold spring–summer borders
- Cottage or pollinator gardens
- Cutting beds for vase arrangements
- Groups mixed with grasses or perennials like coreopsis or yarrow
Common Issues
- Flower flopping in rich soil or high rain
- Slugs or snails feeding on young shoots
- Poor flowering in deep shade
- Excess self-seeding if not deadheaded
Things to Watch Out For
- Wet winter soil risking crown rot
- Crowded clumps reducing bloom
- Letting plants go to seed if self-sowing is undesired
- Delay in cutting back old foliage may reduce spring vigor
Propagation Tips
Increase stock by dividing clumps in spring or early autumn. Easily grown from seed sown in spring or autumn, generally flowering in the second year.
Maintenance Tips
Deadhead spent blooms through summer for extended flowering. Cut back spent stems after blooming or leave seedheads for winter interest. Refresh clumps every 3–4 years by division to maintain vigor.
Did You Know?
The flower gets its common name “Maltese Cross” from its distinctive petal shape and its early popularity in European gardens where it may have been brought by Crusaders returning from the Levant.
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