Ginger

In brief: Ginger (Zingiber officinale) flowers only very rarely in cultivation, so most growers never see its yellow-purple flowers. If it is showy flowers that interest you, there are ornamental related ginger species that are grown mainly for them, not for the rhizome.

Ginger, botanically Zingiber officinale, is a perennial herb from Asia growing up to ninety centimetres tall, with long, narrow lance-shaped leaves and a characteristic thick, aromatic rhizome, for which it is commonly grown. It belongs to the genus Zingiber, which according to more recent botanical surveys includes over two hundred species, covering both culinary ginger and a number of purely ornamental relatives grown mainly for their conspicuous flowers.

What culinary ginger looks like and how often it flowers

If you grow ginger at home, you will probably never see it flower, because in ordinary growing conditions it flowers only very rarely. If flowering does occur, a separate, short spike with tiny yellow to yellow-green flowers with purple spots grows from the rhizome. A leafy above-ground stem is much more reliable to appear, and it gradually dries as the plant directs its energy back into the thickening rhizome underground. It is precisely because of the rare flowering that the query "ginger flower" is often asking rather what such a flower looks like than the grower actually expecting to see it on their own plant.

Ornamental ginger species grown for flowers

If it is showy flowers that interest you, you do not have to rely on the rare flowering of culinary ginger. In the genus Zingiber you will find a number of species bred and grown exclusively as ornamental plants, for which the striking, colourful inflorescence is the main reason for growing them, while the rhizome is unsuitable for culinary use or is not harvested at all. Among such ornamental species is also ornamental ginger, Zingiber clarkeii, which can also be obtained as seed under the name Ornamental ginger (Zingiber clarkeii). Unlike culinary ginger, it is a species chosen precisely for richer and more reliable flowering, not for the culinary use of the root.

Why ginger does well in the kitchen without flowers

The fact that culinary ginger almost never flowers at home in no way reduces its value as a cultivated plant; the whole useful part, the rhizome, grows underground regardless of whether the above-ground part decides to flower. For growers who mainly want to harvest the rhizome, flowering is therefore not key; detailed instructions for growing and harvesting culinary ginger can be found in the articles The legendary root: Ginger and Ginger at home and in the garden, where you will learn more about requirements for substrate, warmth and watering.

How to tell ginger from similarly named plants

The name ginger sometimes appears in shops also for plants that have nothing in common botanically with culinary ginger, only a similar scent or leaf shape. These include, for example, so-called ginger grass, which is actually a species related to lemongrass, or mountain ginger, plai, which is popular in essential oils but is a completely different genus of plants. If you are buying seed or planting material, it therefore always pays to check the botanical name so that you get exactly what you are looking for, whether it is a culinary rhizome or an ornamental flowering plant. A mix-up may not always be recognisable at first glance either; young plants without flowers and without the typical scent of the rhizome can look quite similar, and only after flowering or after digging up the rhizome does it become clear whether it is really the species you wanted to obtain.

How to increase the chance that ginger will flower

Although flowering of culinary ginger is rare in ordinary growing, in more mature, well-established plants the chance of flowering rises somewhat. Plenty of warmth and moisture throughout the growing season helps, as do a stable, non-fluctuating temperature and above all growing the same plant over several years, because freshly planted, young rhizomes flower even considerably more rarely than older, well-established clumps. If you grow ginger in a pot, it also benefits from repotting into a larger container with fresh substrate after every one to two seasons, because an overgrown and congested root system weakens the plant in the long term rather than supporting the formation of new flowers. Despite all the care, however, flowering remains more of an exception than a rule, and growers who want to be certain of seeing the plant flower should reach straight for one of the ornamental ginger species mentioned above.

Why ornamental ginger species are less well known

While culinary ginger is known to almost everyone because of its distinctive, hot root, the ornamental related species remain here more of a marginal matter for collectors of exotic plants. The reason is mainly that most of them come from the tropical areas of south-east Asia and need considerably higher air humidity and steadier warmth for growing than an ordinary flat or garden in central Europe normally offers. In the conditions of a greenhouse or conservatory, however, they thrive much better and reward you with conspicuous, often deep red, pink or orange inflorescences, which you practically never see on culinary ginger, and that is also why these plants are a popular and valued decoration of tropical greenhouses, conservatories and botanical gardens. For lovers of unusual houseplants they thus represent an interesting alternative to more commonly grown tropical species.

Frequently asked questions

What does a ginger flower look like?

A small yellow to yellow-green spike with purple spots that grows straight from the rhizome, but in ordinary growing you will see it only very rarely.

Why is my home-grown ginger not flowering?

That is normal for culinary ginger; in home-growing conditions it flowers only rarely, but this has no effect on the formation and quality of the rhizome.

Is there a ginger that flowers more reliably?

Yes, the ornamental related species of the genus Zingiber, for example ornamental ginger, are grown precisely for their conspicuous and more reliable flowers.

Is ornamental ginger edible like the culinary one?

Ornamental species are grown primarily for flowers, not as a substitute for culinary ginger, so when choosing seed it pays to check the exact botanical name.

How many species of ginger are there?

The genus Zingiber includes over two hundred species, of which only a small part is grown for the edible rhizome, while most of the others serve as ornamental plants.

Where can I find instructions for growing ginger for the kitchen?

You will find a detailed procedure for growing and harvesting in the articles The legendary root: Ginger and Ginger at home and in the garden.

Sources

Ginger – Wikipedia

Zingiber – Wikipedia (English)

Updated: 11 October 2026