Allium fistulosum

A wonderfully versatile and easy-to-grow perennial onion, Allium fistulosum, commonly known as the Welsh Onion, produces attractive clumps of hollow green leaves topped with rounded heads of creamy-white flowers in summer.

Despite its common name, it did not originate in Wales; the name is thought to derive from an old German word meaning "foreign". This useful plant has been cultivated for centuries across Europe and Asia as both an ornamental and culinary crop.

The fresh green stems can be harvested much like spring onions, while the decorative flower heads attract bees and other pollinating insects. In the garden, it forms handsome clumps that are equally at home in ornamental borders, kitchen gardens and wildlife-friendly planting schemes.

Reliable, hardy and long-lived, Welsh Onion is an excellent choice for gardeners looking for a plant that is both beautiful and productive.

Planting Instructions

When to Plant:

Plant in spring or autumn when the soil is workable and not frozen or waterlogged.

Where to Plant:
Choose a position in full sun or partial shade with fertile, well-drained soil. Ideal for kitchen gardens, herb gardens and mixed perennial borders.

How to Plant:

• Depth: Plant with the crown at soil level.
• Spacing: Space plants approximately 30 cm (12 inches) apart.
• Soil Prep: Improve soil with compost or well-rotted organic matter before planting.

Watering:
Water after planting and keep soil moderately moist while plants establish.

Aftercare Tips:

• Harvest stems as required throughout the growing season.
• Divide established clumps every few years to maintain vigour.
• Allow some flowers to remain for pollinators.

Top Tip:
Plant near vegetables and herbs to attract pollinating insects into the kitchen garden.

Plant Details

Flowering Period:

June – August (depending on season and conditions)

Height:
24–36" (60–90cm) (approx.)

Position:
Full sun or partial shade

Hardy Perennial