How to Grow Hare's Ear
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Hare's Ear
Bupleurum rotundifolium
flowerHare's Ear is an delicate annual flower native to the Mediterranean region, characterized by distinctive rounded, blue-green foliage that appears to pierce through the stems. It produces small, chartreuse-yellow flowers in umbels that add an unusual, architectural quality to gardens and cut flower arrangements. The plant is valued both as a novelty ornamental and as a filler flower in floristry.
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Example Hare's Ear timeline · Pittsburgh, PA (Zone 6b)
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Plant Hare's Ear
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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First Hare's Ear blooms
Around Jun 16≈ 60 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Hare's Ear dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-10; prefers cooler climates and tolerates frost
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Get my Hare's Ear timeline →Growth Stages
Germination & Seedling
2-3 weeksTiny seedlings with first true leaves emerging; initial growth is slow and compact.
Keep soil moist but not soggy. Provide bright light. Thin seedlings to proper spacing once they have 2-3 true leaves. Avoid transplanting shock by starting in situ if possible.
Vegetative Growth
3-4 weeksPlant develops distinctive rounded, perfoliate foliage (leaves appear to encircle the stem). Stems elongate and branching begins.
Maintain consistent moisture and full sun exposure. Pinch early growth if bushier plants are desired, though this will delay flowering. Support with stakes if needed in windy locations.
Bud Formation & Flowering
4-6 weeksMultiple flower buds form at stem tips, developing into tight umbels of tiny yellow-green flowers.
Reduce nitrogen fertilizer to encourage flowering. Deadhead spent flowers to extend bloom period. Feed with balanced or slightly phosphorus-rich fertilizer.
Peak Bloom & Maintenance
6-10 weeksPlant produces abundant chartreuse flowers in succession; foliage remains decorative throughout.
Continue deadheading for extended flowering. Water during dry spells. Monitor for pests. Cut stems for flower arrangements regularly to encourage more blooms.
Seed Set & Senescence
2-3 weeksFlowers fade to seed pods; plant gradually slows growth as temperatures shift or season lengthens.
If seed saving is desired, allow some flowers to mature to seed; harvest seed pods when dry and brown. Otherwise, remove spent plants or allow self-seeding.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Spray with water to dislodge; use insecticidal soap or neem oil if infestations persist.
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Increase humidity; spray foliage with water regularly. Use miticide if severe.
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Use yellow sticky traps; spray with neem oil or insecticidal soap.
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Ensure excellent drainage. Avoid watering foliage. Remove affected plants and improve soil aeration.
Uses
Traditional medicinal tea & digestive aid
CulinaryBupleurum has been used in Traditional Chinese Medicine for centuries as an herbal remedy. The roots and aerial parts are steeped to create a tea believed to support liver function and digestive health. [source]
Cut flower & floral design
CraftThe unique chartreuse flower umbels and distinctive foliage make Hare's Ear a premium filler flower in modern floral arrangements and wedding bouquets. It adds textural interest and an architectural quality to designs. [source]
Dried flower arrangements & botanical décor
HouseholdStems dry beautifully while retaining color and form, making them ideal for dried arrangements, wreaths, and long-lasting botanical displays. Harvest when flowers are fully open and hang-dry in a cool, dark space. [source]
Pollinator support & beneficial insect attraction
WildlifeSmall flowers attract bees, hoverflies, and other beneficial insects that support garden ecosystems. The extended bloom period provides sustained nectar and pollen resources. [source]
Hepatoprotective & anti-inflammatory phytochemical content
MedicinalBupleurum contains saikosaponins and other compounds studied for potential liver-protective and anti-inflammatory properties in traditional and modern herbal medicine. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Cut stems for flower arrangements when flower buds are just opening to yellow, early in the morning when stems are most turgid. Recut stems at an angle and remove lower foliage. Change water every 2-3 days for longest vase life (10-14 days). For seed saving, allow flowers to fade and seed pods to fully dry on the plant, then harvest when brown and brittle.
Fun Facts
- 🌱 The common name 'Hare's Ear' refers to the distinctive rounded, ear-like leaves that appear to pierce through the stems—a botanical trait called 'perfoliate' leaves.
- 🌱 Bupleurum rotundifolium has been used in Traditional Chinese Medicine for over 2,000 years, primarily in formulas addressing liver function and emotional well-being.
- 🌱 The chartreuse-yellow flowers provide a sophisticated, unusual color in floral design that photographs beautifully and pairs well with both pastels and jewel tones.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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