Bring bold structure and elegant beauty to your garden with Allium Obliquum Seeds, valued for their striking round flower heads and strong architectural presence. Known as the Ornamental Onion, this unique species produces globe-shaped yellow blooms that add height, texture, and visual interest to garden beds and landscape borders.

Highly reliable and easy to grow, Allium Obliquum thrives in sunny locations and well-drained soil. Its ornamental value, long-lasting flowers, and impressive vertical form make it ideal for both formal and modern-style gardens.

Key Features

• Produces striking globe-shaped yellow flower heads

• Adds bold height and architectural structure to gardens

• High-quality, non-GMO seeds

• Long-lasting blooms suitable for cutting gardens

• Excellent for borders, rock gardens, and landscape designs

• Low maintenance and drought tolerant once established

• Resistant to most pests and wildlife

Specifications

Botanical Name: Allium obliquum
Common Name (US): Ornamental Onion
Plant Type: Perennial (bulb-forming)
Seed Type: Premium, High-Quality, Non-GMO
Flower Color: Soft Yellow
Bloom Season: Late Spring to Early Summer
USDA Hardiness Zones: 4–9
Sun Exposure: Full Sun
Soil Requirements: Well-drained, sandy or loamy soil
Plant Height: 24–36 inches
Spacing: 8–12 inches
Water Needs: Low to moderate
Germination Time: Slow; 21–60 days
Germination Temperature: 60–70°F
Growth Habit: Upright with tall, sturdy stalks
Uses: Borders, cutting gardens, rock gardens, modern landscapes
Special Notes: Seeds may require a cold stratification period for better germination.

Planting Guide

1. Stratification (Recommended)

• Refrigerate seeds in moist sand or peat for 4–6 weeks to improve germination.

2. Sowing Instructions

• Sow seeds ¼ inch deep in well-drained soil or seed-starting mix.

• Keep soil lightly moist, not soggy.

3. Light & Temperature

• Place in a bright location or under grow lights.

• Maintain temperatures between 60–70°F.

4. Transplanting

• Transplant outdoors after frost danger has passed.

• Choose a full-sun area with well-drained soil.

5. Watering & Care

• Water sparingly; avoid overwatering.

• Mulch lightly to maintain moisture and reduce weeds.

• Allow foliage to die back naturally after blooming to strengthen bulbs.

6. Flowering Timeline

• Allium may require one full season of growth before blooming.

• Expect spherical flower heads in late spring to summer.

Benefits

• Adds beautiful vertical accents to gardens

• Drought tolerant once established

• Excellent for pollinator-friendly landscapes

• Long-lasting cut flowers

• Unique flower shape enhances modern and classic garden designs