Bupleurum Griffithii
Bupleurum 'Griffithii' Seeds (Hare's Ear)
If you find your home-grown bouquets look a bit "heavy" or cluttered, Bupleurum is the missing ingredient. It produces tall, wiry, branching stems topped with lime-green, spurge-like flowers that act as a natural scaffold, holding other blooms in place.
Often compared to Eucalyptus for its foliage or Euphorbia for its colour, this is the ultimate neutral filler. It adds "air" and movement to arrangements, and its acid-green tone makes hot oranges vibrate and cool blues look deeper. It is incredibly long-lasting in the vase (often outliving the main flowers) and dries beautifully for winter wreaths.
Read More
🌿 Understanding the Plant
Bupleurum is a Hardy Annual.
It is easy to grow but has a reputation for being tricky to germinate if you don't know its secret (see below!). 'Griffithii' is the specific variety bred for cut flowers, offering longer stems and more uniform growth than the wild type.
The "False Flower": The lime-green "petals" are actually bracts (modified leaves). Because they aren't delicate petals, they don't wilt in the rain or fade in the sun.
🌱 Growing Guide: How to Sow and Grow
Crucial Tip: Bupleurum seeds need darkness to germinate. If you leave them on the surface of the soil, they will refuse to grow.
Germination:
Sow directly outdoors in Autumn (Sept) or Spring (March-April). Cover the seeds completely with soil or vermiculite to exclude light. They prefer cool temperatures to germinate (13-15°C), so don't put them in a hot propagator. Germination takes 14-21 days.
Where to Sow:
It needs full sun and well-drained soil. It dislikes root disturbance, so direct sowing is often better than transplanting.
Care While Growing:
Support: Although the stems are wiry, the plants can get top-heavy when in full bloom. Planting them close together (20cm) allows them to support each other, or use some netting.
📋 Plant Specifications
| Latin Name | Bupleurum rotundifolium 'Griffithii' |
| Common Name | Hare's Ear / Thorow-wax |
| Hardiness | H4 (Hardy Annual) |
| Light Required | Full Sun ☀️ |
| Height | ↕️ 60cm - 80cm |
| Spread | ↔️ 30cm |
| Spacing | 🌱 20cm apart |
| Great for | ✂️ Cut Flower Filler 🍂 Drying 🌿 Foliage Substitute 💐 Wedding Flowers |
| Seed Count | Approx. 100 seeds per packet |
🤝 Perfect Garden Companions
Bupleurum is a "mixer." It makes bright colours pop:
- 🧡 Calendula 'Indian Prince': The Citrus Burst. The zesty lime green of Bupleurum next to the deep mahogany-orange of the Calendula creates a high-energy, vibrant display that screams "Summer."
- 💙 Cornflower 'Blue Ball': The Cool Palette. For a calmer look, mix Bupleurum with electric blue Cornflowers and white Ammi. It creates a fresh, clean, meadow-style border.
📅 Sowing & Flowering Calendar
Sow outdoors in autumn or spring. Flowers June to August.
| Month | J | F | M | A | M | J | J | A | S | O | N | D |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sow Outdoors | 🟢 | 🟢 | 🟢 | 🟢 | 🟢 | |||||||
| Flowers | 🌸 | 🌸 | 🌸 |
⚠️ Vase Life Tip
To make Bupleurum last up to 10 days in the vase, dip the cut ends of the stems into boiling water for 10 seconds (sear them) before placing them into cold water. This helps them take up water more efficiently.
🏆 Officially Recognised Excellence
This variety holds the prestigious RHS Award of Garden Merit, certifying it as a reliable, high-performing plant that is excellent for British gardens.
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Description
Bupleurum 'Griffithii' Seeds (Hare's Ear)
If you find your home-grown bouquets look a bit "heavy" or cluttered, Bupleurum is the missing ingredient. It produces tall, wiry, branching stems topped with lime-green, spurge-like flowers that act as a natural scaffold, holding other blooms in place.
Often compared to Eucalyptus for its foliage or Euphorbia for its colour, this is the ultimate neutral filler. It adds "air" and movement to arrangements, and its acid-green tone makes hot oranges vibrate and cool blues look deeper. It is incredibly long-lasting in the vase (often outliving the main flowers) and dries beautifully for winter wreaths.
Read More
🌿 Understanding the Plant
Bupleurum is a Hardy Annual.
It is easy to grow but has a reputation for being tricky to germinate if you don't know its secret (see below!). 'Griffithii' is the specific variety bred for cut flowers, offering longer stems and more uniform growth than the wild type.
The "False Flower": The lime-green "petals" are actually bracts (modified leaves). Because they aren't delicate petals, they don't wilt in the rain or fade in the sun.
🌱 Growing Guide: How to Sow and Grow
Crucial Tip: Bupleurum seeds need darkness to germinate. If you leave them on the surface of the soil, they will refuse to grow.
Germination:
Sow directly outdoors in Autumn (Sept) or Spring (March-April). Cover the seeds completely with soil or vermiculite to exclude light. They prefer cool temperatures to germinate (13-15°C), so don't put them in a hot propagator. Germination takes 14-21 days.
Where to Sow:
It needs full sun and well-drained soil. It dislikes root disturbance, so direct sowing is often better than transplanting.
Care While Growing:
Support: Although the stems are wiry, the plants can get top-heavy when in full bloom. Planting them close together (20cm) allows them to support each other, or use some netting.
📋 Plant Specifications
| Latin Name | Bupleurum rotundifolium 'Griffithii' |
| Common Name | Hare's Ear / Thorow-wax |
| Hardiness | H4 (Hardy Annual) |
| Light Required | Full Sun ☀️ |
| Height | ↕️ 60cm - 80cm |
| Spread | ↔️ 30cm |
| Spacing | 🌱 20cm apart |
| Great for | ✂️ Cut Flower Filler 🍂 Drying 🌿 Foliage Substitute 💐 Wedding Flowers |
| Seed Count | Approx. 100 seeds per packet |
🤝 Perfect Garden Companions
Bupleurum is a "mixer." It makes bright colours pop:
- 🧡 Calendula 'Indian Prince': The Citrus Burst. The zesty lime green of Bupleurum next to the deep mahogany-orange of the Calendula creates a high-energy, vibrant display that screams "Summer."
- 💙 Cornflower 'Blue Ball': The Cool Palette. For a calmer look, mix Bupleurum with electric blue Cornflowers and white Ammi. It creates a fresh, clean, meadow-style border.
📅 Sowing & Flowering Calendar
Sow outdoors in autumn or spring. Flowers June to August.
| Month | J | F | M | A | M | J | J | A | S | O | N | D |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sow Outdoors | 🟢 | 🟢 | 🟢 | 🟢 | 🟢 | |||||||
| Flowers | 🌸 | 🌸 | 🌸 |
⚠️ Vase Life Tip
To make Bupleurum last up to 10 days in the vase, dip the cut ends of the stems into boiling water for 10 seconds (sear them) before placing them into cold water. This helps them take up water more efficiently.
🏆 Officially Recognised Excellence
This variety holds the prestigious RHS Award of Garden Merit, certifying it as a reliable, high-performing plant that is excellent for British gardens.
