Architectural, pollinator-friendly, and just a little bit otherworldly, alliums are the quiet stars of the late spring and early summer garden. These striking globe-headed plants, also known as ornamental onions, rise elegantly above borders on tall, slender stems, adding height, texture, and a sense of structure just when many spring bulbs are beginning to fade. From small, subtle varieties to those dinner-plate-sized blooms that stop you in your tracks, allium bulbs bring a sculptural quality that’s hard to match.

In the UK, allium bulbs are a popular choice for good reason. They’re easy to grow, thrive in most well-drained soils, and tend to be unbothered by pests — even hungry squirrels and deer usually give them a miss, thanks to their oniony aroma. Autumn is the best time to plant them, giving the allium bulbs time to settle in before their late-spring performance. Once established, many alliums will return year after year, and some will gently self-seed, creating an ever-evolving display. Whether planted in drifts or dotted through a border, their spherical blooms add a touch of elegance and rhythm.

But alliums aren’t just about good looks — they’re hard workers too. These ornamental onions are brilliant for attracting bees and other pollinators, extending your garden’s appeal beyond aesthetics. They also pair beautifully with perennials like Nepeta, Salvia and grasses, softening their bold forms with movement and texture. With so many sizes, colours and styles to choose from, there’s an allium bulb for every planting scheme. Whether you're after a splash of purple pompoms, subtle silver tones or starburst-style umbels, allium bulbs deserve a spot in any UK garden. Once you grow them, you’ll wonder why you didn’t start sooner.