Blue ornamental onion (Allium caeruleum) – 320 flower bulbs (size 4/5)

Plant these 320 Blue ornamental onion (Allium caeruleum) bulbs from September through November, and you will enjoy blue flowers from June through July. Ornamental onions bear round flower heads on tall stems and are a popular source of nectar for bees and butterflies. Use them in borders among perennials, gravel gardens, and large pots; the spent bulbs remain decorative. Bulb size 4/5 indicates how many centimeters the bulbs measure in circumference; a larger bulb contains more reserves for flowering.

Characteristics

• Indoor or outdoor: Outdoor plant – for garden, balcony and terrace
• Botanical name: Allium caeruleum
• Quantity: 320 bulbs
• Bulb size: 4/5
• Flower colour: blue
• Flowering period: June–July
• Planting time: September through November
• Planting depth: 8–10 cm
• Planting distance: approx. 15 cm (enough for approximately 7 m²)
• Location: sun
• Hardiness: hardy
• Pets: toxic to cats and dogs

Planting and care

Plant the bulbs 8–10 cm deep with the tip facing up, in well-drained soil. Ornamental onions like a warm spot and well-drained soil. In wet, heavy clay, the bulbs rot in winter. Also view our range of potting soil & tools to plant your bulbs properly.