What Crops Have White Flowers?

White flowers appear across a remarkably wide range of cultivated plants, from staple grains and legumes to fruit trees, fiber crops, and kitchen herbs. Peas, chickpeas, cotton, buckwheat, potatoes, many fruit trees, garlic, and certain varieties of rapeseed and canola all produce white or near-white blossoms during their reproductive stages. In some of these crops, white is the dominant flower color across all cultivated varieties; in others, it marks a specific type or cultivar that was selected during domestication. The reasons a crop ends up with white flowers vary, but the genetics behind flower pigmentation and its practical significance for growers and pollinators make the story richer than a simple list.

Peas, Chickpeas, and Other Legumes

The most famous white-flowered crop in all of biology is the garden pea. Gregor Mendel used white- and purple-flowered pea lines in his foundational experiments on inheritance in the 1860s. Researchers eventually identified that the white-flowered form results from a mutation in a gene encoding a transcription factor involved in anthocyanin production. In the most common white-flowered mutant, a single nucleotide change at a splice site causes the gene’s messenger RNA to be cut incorrectly, producing a shortened, nonfunctional protein. Without a working copy of that gene, the pea plant cannot make the purple pigments that normally color its flowers.¹ Today, both white-flowered and purple-flowered pea varieties are widely grown, with white-flowered types often preferred for dry pea production because they tend to have lighter seed coats and milder flavors.

Chickpeas tell a similar story of domestication and pigment loss. The two major market types of chickpea are known as desi and kabuli. Desi chickpeas have colored flowers and dark seed coats, while kabuli chickpeas have white flowers and light-colored, cream-toned seeds. The kabuli type is not found in the wild progenitor of chickpea, meaning its white flowers arose after domestication through changes in a transcription factor associated with pigment production.² Kabuli chickpeas are the large, round, pale variety most people in Western countries recognize from hummus and salad bars. Soybeans also produce small white or very pale lilac flowers depending on the variety, though in soybeans the difference between white and purple flowers has less commercial significance than it does in chickpeas or peas.

White clover, widely grown as a forage and cover crop, is another legume instantly recognizable by its rounded white flower heads. Common beans can also flower white, particularly many dry bean varieties bred for light-colored seeds.

Cotton

Cotton is one of the most economically important white-flowered crops on Earth. Its flowers, however, are only white for a brief window. A cotton flower typically opens cream or pale yellow in the morning and then gradually shifts toward pink and eventually red over the following day as anthocyanin pigments accumulate in the petals.³ This rapid color change is driven by the flavonoid pathway, the same set of biochemical reactions responsible for pigment production in most flowering plants. A cotton field in full bloom can look surprisingly colorful when flowers at different stages are open simultaneously, but the creamy white phase on the first morning is what most people picture.

The color change in cotton flowers also serves as a useful signal for pollinating insects. A freshly opened, pale flower still has viable pollen and nectar, while a reddened flower has already been pollinated or has passed its peak receptivity. This rapid visual shift effectively directs pollinators to the flowers where their visits are most productive.

Buckwheat

Buckwheat is a pseudocereal, meaning it produces grain-like seeds but is not a grass. Its clusters of small white to pinkish-white flowers are one of its most distinctive features, and they play a central role in the crop’s productivity because buckwheat depends heavily on insect pollination. The plant has an unusual flowering system: it produces two types of flowers, called pin and thrum, that differ in the relative lengths of their pistils and stamens. Fertilization only occurs through cross-pollination between these two flower types.⁴

This means that buckwheat fields absolutely require pollinator visits to set seed. Honeybees are the primary pollinators, but research has shown that smaller insects also contribute meaningfully to yields. In experiments where honeybees and larger insects were excluded using mesh bags, pin flowers showed a dramatic reduction in seed set, while smaller insects visiting thrum flowers were able to maintain roughly half the normal yield on their own.⁵ Buckwheat’s white flowers, which are open and shallow in shape, make nectar and pollen accessible to a broad range of insect visitors, from tiny flies to large bumblebees. This accessibility is one reason buckwheat is commonly planted as a pollinator-support crop alongside its use for grain and flour.

Rapeseed and Canola

Most people associate rapeseed and canola with vivid yellow flowers, and that is the standard color. But white-flowered rapeseed varieties do exist and have been studied for their genetics and potential commercial uses. The bright yellow of typical rapeseed flowers comes from carotenoid pigments, and white-flowered variants arise when the carotenoid biosynthesis pathway is disrupted or reduced. Research into the genetics of rapeseed flower color has found that white flower traits involve incomplete dominant genes in most studies, though some work suggests the trait is controlled by two pairs of major genes plus additional modifying genes.⁶

White-flowered rapeseed has attracted interest in part because flower color can be linked to seed quality traits. The same metabolic pathways that produce flower pigments sometimes influence the composition of oils and other compounds in the seeds. Breeders working on specialty canola varieties occasionally consider flower color as a marker, though for large-scale oilseed production, the yellow-flowered types remain dominant worldwide.

Potatoes and Other Root Vegetables

Potato flowers come in white, pink, purple, and blue depending on the variety, but white is among the most common colors in commercially grown types. Russet Burbank, one of the most widely planted potato varieties in North America, produces white flowers. The same is true of many other table and processing varieties. Potato flower color is determined by anthocyanin pigments and their associated regulatory genes, and the loss of anthocyanin production that leads to white flowers has occurred independently in many cultivated potato lineages.

Carrots produce large, flat clusters of tiny white flowers when they bolt in their second year of growth. Most consumers never see carrot flowers because carrots are harvested in their first year for their roots, but seed producers and carrot breeders see plenty of them. The wild ancestor of the carrot, sometimes called Queen Anne’s lace, also has white flowers and is common in roadside meadows across temperate regions. Parsnips, a close relative, likewise produce clusters of small yellowish-white flowers.

Onions and garlic also flower white or near-white. Garlic produces an inflorescence structured as an umbel, with numerous small flowers arising from a common meristem.⁷ Most commercial garlic is propagated vegetatively from cloves rather than from seed, so many growers remove the flower stalk (called a scape) to redirect the plant’s energy toward bulb development. When the flowers are allowed to open, they are typically white to pale pink. Onion flowers are similar in structure and range from white to lilac depending on variety.

Fruit and Nut Trees

Some of the most visually striking white flowers in agriculture belong to fruit trees. Apple blossoms are white with a pink blush, and some varieties open nearly pure white. Pear blossoms are reliably white and are among the earliest fruit tree flowers to appear in spring. Sweet and sour cherry trees produce masses of white flowers, and the ornamental appeal of cherry blossoms has made them culturally significant in many countries. Plum trees flower white or pale pink depending on the species and variety.

Citrus trees, including oranges, lemons, limes, and grapefruits, all produce small, intensely fragrant white flowers. Orange blossom is one of the most commercially important flower scents in the world, used in perfumery, flavoring, and herbal teas. Almond trees, which are closely related to peaches and plums, produce white to pale pink flowers that blanket California’s Central Valley each February in one of the largest managed pollination events on Earth.

Strawberry plants are another familiar example. The small white flowers of strawberries are self-fertile in most cultivated varieties, though bee visits improve fruit size and shape. Coffee, technically a tropical shrub or small tree, produces clusters of small, fragrant white flowers along its branches before the coffee cherries develop.

Herbs, Spices, and Minor Crops

A number of culinary and medicinal herbs produce white flowers. Cilantro (also known as coriander when grown for seed) sends up umbrella-shaped clusters of tiny white flowers when it bolts. Chamomile, both German and Roman types, has white ray petals surrounding a yellow center, though only the German type is widely cultivated commercially. Garlic chives produce rounded heads of white flowers and are grown both as an herb and as an ornamental. Jasmine, while not a food crop in the conventional sense, is cultivated extensively for tea flavoring and essential oil production, and its small white flowers are intensely fragrant.

Among minor grain-like crops, quinoa produces dense spikes of tiny flowers that can be white, cream, yellow, pink, or red depending on the variety. White and cream-flowered quinoa varieties are common in commercial production. Sesame, an ancient oilseed crop, produces tubular flowers that are white to pale lavender in many cultivated varieties.

Why So Many Crops Ended Up with White Flowers

White is not really a pigment. A white flower is typically a flower that has lost the ability to produce colored pigments, allowing the structural color of the petals to show through. The petals appear white because their cells scatter light in all directions without selectively absorbing certain wavelengths. This means that in genetic terms, white flowers usually result from the suppression or loss of pigment biosynthesis pathways rather than from the production of a “white” compound.

The most common biochemical explanation involves the flavonoid pathway, which produces anthocyanins (the pigments responsible for reds, purples, and blues in flowers) and flavonols (which are typically colorless or pale yellow). When genes early in this pathway are suppressed or mutated, the entire cascade of pigment production shuts down, and flowers emerge white. Research has shown that suppression of a gene called CHS, or the insertion of transposable DNA elements into that gene, produces white flowers in a number of species.⁸ In crops where carotenoids are the main flower pigment rather than anthocyanins, white flowers instead result from reduced carotenoid production, as in white-flowered rapeseed.

Domestication has played a major role in increasing the frequency of white-flowered types in crops. When humans selected plants for seed traits like lighter seed coats, milder flavor, or reduced bitterness, they were often inadvertently selecting against the same pigment pathways that color flowers. The kabuli chickpea is a clear example: its white flowers and light seed coat both trace to changes in pigment regulation that occurred after the crop was domesticated.² The same pattern shows up in beans, peas, and other legumes where white-flowered lines correlate with lighter-colored, often commercially preferred seed types.

Does Flower Color Matter for Growing?

For home gardeners and farmers, flower color in crops is sometimes more than cosmetic. In several legumes, flower color is a reliable marker for seed coat color and certain quality traits. White-flowered pea varieties, for instance, produce seeds with clear, colorless seed coats and tend to have lower tannin levels, which makes them preferred for food processing. Purple-flowered peas have colored seed coats with higher tannin content, which can make the cooked product darker and more astringent. If you are growing peas for dry soup or split pea products, white-flowered varieties are usually the better choice.

In cotton, the fleeting color of the flower is a practical indicator of pollination timing, as described earlier. And in buckwheat, the white flowers are visually attractive to a wide range of pollinators, which is directly tied to yield since the crop cannot self-pollinate. Buckwheat growers in regions with declining honeybee populations pay close attention to pollinator diversity in their fields precisely because the crop’s white, open flowers are its lifeline to reproduction.

Flower color can also influence pest and pollinator interactions in subtler ways. White flowers tend to reflect ultraviolet light differently than pigmented ones, and many insect pollinators can see in the UV range. The UV patterns on white petals often create landing guides visible to bees but invisible to the human eye. In crops like strawberries and apples where pollinator visits directly affect fruit quality, the reflectance properties of white petals are part of the plant’s strategy for attracting the right insects at the right time.

Crops Where White Is Not the Default

It is worth noting which major crops do not typically flower white, since a reader compiling a mental list might wonder about some common ones. Tomatoes have yellow flowers. Corn produces separate male tassels and female silks rather than conventional petals. Most cereals like wheat, barley, rice, and oats have small, inconspicuous flowers that are wind-pollinated and lack showy petals of any color. Sunflowers are, of course, yellow. Lavender is purple. Most squash and melon varieties have yellow or orange flowers, though the bottle gourd is an exception with large white flowers that open at night for moth pollination.

Peppers produce small white flowers in many varieties, but some cultivars have purple or lavender blooms. Eggplant flowers are typically purple, which makes sense given that eggplant is closely related to other deeply pigmented nightshades. Tobacco, another nightshade, can flower white, pink, or red depending on the species, with the commercially grown tobacco plant often producing pink flowers.

Among berry crops, blueberry flowers are white to pale pink and bell-shaped, while raspberry and blackberry flowers are white. Grape flowers are tiny, greenish, and not particularly showy. The pattern across agriculture is that white flowers are extremely common but not universal, and whether a crop flowers white often reflects its evolutionary history and the specific pigment pathways its ancestors happened to carry or lose along the way.

When Flower Color Changes Within a Single Plant

Cotton is not the only crop where flower color shifts over the life of a single bloom. Some bean varieties open white and gradually flush pink. Certain apple cultivars have buds that are distinctly pink but open to nearly white petals. These changes usually reflect ongoing anthocyanin synthesis triggered by light exposure, temperature, or the physiological state of the flower after pollination.

In cotton, the color transition from cream to deep red happens within about 24 hours and corresponds to a steady accumulation of anthocyanin pigments throughout that period.³ The speed of this shift is unusual among crops and makes cotton an especially useful model for studying how flavonoid pathway genes are regulated in real time. For a grower walking a cotton field, the mix of white, pink, and red flowers on a single plant gives a quick visual readout of how actively the crop is flowering and roughly how many days of bloom are represented.

Temperature also influences flower color intensity in many crops. Cool nights tend to promote anthocyanin accumulation, which is why apple blossoms in cooler climates often have a stronger pink blush than the same variety grown in warmer regions. White-flowered varieties, having lost the ability to produce anthocyanins, stay white regardless of temperature, which can actually be a useful trait for breeders trying to isolate temperature effects on other plant characteristics.