The chives growing in your garden or sitting in a bunch at the farmers market represent just one species in a genus of extraordinary diversity. Allium — the genus that contains chives, onions, garlic, leeks, and shallots — comprises somewhere between 850 and 1,000 recognized species, making it one of the largest genera of flowering plants in the Northern Hemisphere. Understanding where chives fit within that family reveals a plant far more interesting than its modest culinary reputation suggests.

The species you know: Allium schoenoprasum

Common chives (Allium schoenoprasum) is the species sold in grocery stores, grown in herb gardens, and snipped over eggs across North America and Europe. The name comes from the Greek schoinos (rush or reed) and prason (leek) — a reference to the plant's slender, hollow, reed-like leaves.

It is native to a remarkably wide range spanning Europe, Asia, and North America, making it one of the few Allium species with a genuinely circumboreal distribution — that is, it grows naturally across the northern latitudes of multiple continents. This wide range has produced considerable variation in wild populations, and taxonomists have described numerous subspecies and varieties that differ in leaf thickness, flower color, flowering time, and cold tolerance.

Key botanical characteristics of A. schoenoprasum:

  • Leaves: Hollow, cylindrical, dark green, typically 10–40 cm tall
  • Bulbs: Small, elongated, clustered tightly together rather than forming a single large bulb
  • Flowers: Dense spherical umbels, typically lavender to rose-purple, appearing in late spring to early summer
  • Chromosome count: Diploid (2n = 16), though polyploid forms exist in cultivation

The flower structure is worth examining. Each spherical flower head (the umbel) contains 10–30 individual florets, each with six tepals, six stamens, and a single pistil — the standard Allium floral arrangement. The florets are protandrous, meaning the stamens mature and release pollen before the pistil becomes receptive, which encourages cross-pollination.

Allium tuberosum: the garlic chive

The other species most commonly called "chives" in North America is Allium tuberosum, known variously as garlic chives, Chinese chives, or Oriental garlic. Despite the shared common name, it is a genuinely distinct species with different morphology and flavor.

Where common chives have round, hollow leaves, garlic chives have flat, solid, strap-shaped leaves — visually quite different once you know what to look for. The flavor combines the fresh, mild allium note of chives with a distinctly garlicky undertone, coming from different sulfur compounds than those found in A. schoenoprasum.

A. tuberosum produces white flowers (not purple) in flat-topped umbels rather than round heads, and blooms later in summer, typically July through September. It is more cold-sensitive than common chives and may not overwinter reliably in zones colder than 6 or 7 without protection.

The plant also has a tuberous rhizome (hence tuberosum) that allows it to spread more aggressively than common chives, and it self-seeds prolifically if the flowers are allowed to go to seed.

Siberian chives: Allium ledebourianum and relatives

Less widely known in culinary contexts but botanically related is Allium ledebourianum, sometimes called Siberian chives or blue chives. Native to the mountain ranges of Central Asia, it produces larger, more robust plants than common chives with a stronger flavor. It is grown occasionally as an ornamental and in specialty herb gardens.

Several other wild Allium species produce edible leaves with a chive-like character and have been used as food plants across their native ranges, including Allium sibiricum (a close relative or possibly a subspecies of A. schoenoprasum from Siberia and Alaska), Allium schoenoprasum var. sibiricum (distinguished by slightly larger flowers and greater cold hardiness), and Allium nutans, the blue-flowered Siberian chives, which produces wider, slightly glaucous leaves with a milder flavor.

Cultivated varieties of common chives

Within A. schoenoprasum, horticulturalists have selected and named a number of cultivars that differ in characteristics useful to gardeners and cooks.

'Staro' is a Dutch selection widely grown commercially for its upright habit, fine-textured leaves, and high yield. It is one of the most common cultivars in the cut-herb trade.

'Forescate' produces somewhat coarser leaves and deeper rose-pink flowers than average, making it valuable as an ornamental as well as a culinary herb. It is notably vigorous.

'Polycross' and 'Grolau' are selections bred specifically for indoor and forced growing, with reduced light requirements and steady winter production — useful for greenhouse cultivation or windowsill growing in northern climates.

Giant or 'Profusion' types have been selected for unusually large, densely packed flower heads and are grown primarily as ornamentals, though the flowers and leaves remain edible.

Fine-leaved varieties (sometimes sold simply as "fine chives" or "herb chives") have been selected for thinner, more delicate leaves than standard types — preferred by chefs for fine garnishing work where a delicate texture matters.

What makes Allium so diverse?

The extraordinary species richness of the genus reflects both its long evolutionary history and its adaptability. Allium species have colonized an enormous range of habitats — from sea level meadows to high alpine scree, from the steppes of Central Asia to the woodlands of Eastern North America — and have differentiated over millions of years in relative isolation.

Many Allium species can hybridize where they occur together, which has complicated taxonomy and blurred species boundaries in some groups. Molecular phylogenetics has substantially revised our understanding of relationships within the genus over the past two decades, and the classification of some species — including several close relatives of common chives — remains under active revision.

For the kitchen gardener, the practical takeaway is simple: the single species Allium schoenoprasum contains more genetic diversity than its familiar appearance suggests, and the broader chive category encompasses at least two widely used culinary species with meaningfully different flavors, textures, and growth habits. Knowing which one you have — and which you want — makes a difference both in the garden and on the plate.