Cornflower is one of the most beloved wildflowers turned garden favorite, instantly recognizable for its vivid blue, fringed blossoms that once grew wild throughout European grain fields. A single plant typically reaches 12 to 36 inches in height, sending up slender, gray-green branching stems topped with flowerheads that measure roughly 1 to 1.5 inches across. Despite its delicate, thistle-like appearance, cornflower is remarkably tough, tolerating poor soil, drought, and neglect better than most ornamental annuals, and it grows across an unusually wide climate range, from USDA zone 2 through zone 11.
The bloom season for cornflower typically stretches from late spring through mid-summer, roughly a 6 to 10 week window, and with regular deadheading a single planting can continue producing flowers well into August. Each flowerhead is actually a cluster of dozens of tiny individual florets, arranged in a ring of larger outer petals surrounding a denser center. While the classic shade is an intense, saturated blue, over a century of breeding has expanded the palette to more than a dozen distinct colors, including shades of pink, wine red, lavender, maroon, and pure white.
Cornflower is exceptionally productive from a seed standpoint, with a single pound of seed containing roughly 97,000 individual seeds, which explains how quickly a small planting can spread and reseed itself season after season. It is also a favorite of pollinators, drawing honeybees, native bees, and butterflies throughout its long bloom window, and the seedheads that follow are a valued food source for finches and other seed-eating birds. Spacing recommendations typically call for plants to be set 6 to 12 inches apart, since each plant can spread nearly a foot wide at maturity.
Beyond the garden, cornflower carries a long history of symbolic and practical use, dating back more than 3,000 years to its documented presence in ancient Egyptian tombs, and its edible petals are still used today to add color to salads, cheeses, teas, and dried spice blends. Germination typically takes 7 to 14 days under the right conditions, and most types reach full bloom within 60 to 90 days of sowing. While grown mainly as a fast-cycling annual, several types are true perennials capable of returning for 3 or more consecutive seasons.
Types of Cornflower Plants
Blue Boy
Blue Boy is the archetypal cornflower, producing fully double, richly saturated blue blossoms roughly 1.5 inches across on tall, slender stems that reach 24 to 36 inches in height. Its stems are wiry but strong, wrapped in narrow, gray-green leaves that give the whole plant a soft, silvery texture even before the flowers open. It is one of the most widely available types in seed catalogs, typically blooming within 65 to 75 days of sowing, and once established it flowers steadily for 8 weeks or more with regular deadheading. Blue Boy is prized both for cut flower arrangements, where its stems easily hold up for a week in water, and for naturalizing in cottage gardens, where its branching habit weaves easily among other plantings without overwhelming them.
Black Ball
Black Ball produces unusually dark, deep maroon to near-black double blooms about 1.5 inches wide, held on stems that reach 24 to 30 inches tall and branch freely from the base, often producing 15 to 20 flowering stems per plant over a season. The tight, rounded flower shape is densely packed with narrow petals, giving each bloom a plush, velvety appearance that photographs particularly well against lighter-colored companions. It holds its form for 7 to 10 days after cutting, losing very little color or shape, which makes this type a favorite among growers who specialize in moody, richly colored bouquets. Black Ball performs best in full sun and tends to darken further in color during periods of cooler night temperatures.
Red Boy
Red Boy offers a warm, brick-red to deep rose double bloom measuring about 1.5 inches across, on upright stems that grow 24 to 30 inches tall with moderate branching. The foliage is typical of the species, narrow and gray-green, but the bold red-orange tone of the flowers sets this type apart from the blue and pink shades most people associate with cornflower. It flowers heavily for 8 to 10 weeks when deadheaded regularly, often producing a second flush of blooms 3 to 4 weeks after the first is spent, and holds up well as a cut flower for roughly a week in the vase. Red Boy is a popular choice for gardeners looking to add warmth to an otherwise cool-toned cutting bed.
Pinkie
Pinkie is valued for its soft, clear pink double blossoms, around 1.25 inches in diameter, produced in generous quantities on plants that stay slightly more compact than other tall types, typically 20 to 26 inches. The flowers open gradually over several weeks rather than all at once, which extends the visual display and gives a steady, rather than a single dramatic, flush of color. It flowers reliably for 6 to 8 weeks, making it a good fit for mixed borders as well as cutting beds, and its gentler pastel tone blends easily with both bright and muted color schemes. Pinkie tends to tolerate light afternoon shade slightly better than some of the taller, more sun-hungry types.
Snowman
Snowman produces pure white, fully double flowerheads roughly 1.5 inches across on sturdy stems reaching 24 to 30 inches tall, each carrying multiple side branches capable of producing 10 or more blooms per plant. The crisp white petals hold their brightness even in full summer heat, unlike some pale types that can fade or yellow slightly as temperatures climb. Its white blooms are especially popular in wedding and event floristry, holding their color for 5 to 7 days once cut, and they pair easily with nearly any other flower color in a mixed arrangement. Snowman is also a reliable reseeder, often returning in reduced numbers the following spring in milder climates.
Polka Dot Mix
Polka Dot Mix is a compact, dwarf type that produces a wide spread of colors, including blue, pink, red, and white, all on plants that stay under 16 inches tall and spread about 10 to 12 inches wide. Because the seed is sold as a blend, a single row can produce 4 or 5 distinct flower colors, giving beds a cheerful, varied look without needing to plant several separate types. It flowers within 60 to 70 days of sowing and continues for 6 to 8 weeks, and its short stature makes it well suited to container plantings and the front 6 to 8 inches of a border where taller cornflower types would otherwise flop or shade out smaller neighbors.
Frosted Queen
Frosted Queen is known for its pastel color palette, combining soft blues, pinks, and lavenders with a slightly ruffled, frosty appearance to the petal edges, on tall, airy stems that reach 28 to 32 inches. Individual blooms measure about 1.5 inches across and are held on wiry stems that move gently in the breeze, giving plantings a light, textural quality rather than a dense block of color. The plants flower continuously for 8 weeks or more when cut regularly, and because the stems are especially long and straight, this type is a favorite among growers producing bouquets for farmers markets and flower subscriptions.
Dwarf Blue Midget
Dwarf Blue Midget is one of the shortest cornflower types available, typically staying under 12 inches tall while still producing the classic intense blue blossoms, each about 1 inch across, in dense abundance across a compact 8 to 10 inch spread. Despite its small size, a single healthy plant can produce dozens of blooms over the course of the season, since its short stature encourages heavy branching close to the ground. Its compact size makes it especially useful for rock gardens, edging, and small containers, where it flowers for 6 to 8 weeks and requires no staking, unlike almost every taller cornflower type.
Jubilee Gem
Jubilee Gem is a compact, early-flowering type prized for its rich violet-blue blooms, roughly 1.5 inches wide, produced on plants that stay under 18 inches tall with a tidy, rounded growth habit. It often flowers within 60 days of sowing, several days earlier than most other dwarf types, which makes it a popular choice for gardeners in shorter-season climates who want reliable summer color. Once flowering begins it continues for 8 to 10 weeks, and the plant’s naturally bushy form, spreading about 12 inches wide, means it rarely needs pinching or staking to stay upright.
Mauve Ball
Mauve Ball produces soft, dusty mauve-purple double flowerheads about 1.5 inches across on stems reaching 24 to 28 inches, with a growth habit that branches moderately from mid-stem upward. Its muted, antique color tone sets it apart from the brighter blues and pinks of most other cornflower types, making it a favorite for vintage-style and dried floral arrangements. It flowers for roughly 6 to 8 weeks and holds up well for 5 to 7 days as a cut flower, and the dusty coloring tends to intensify slightly as the blooms age on the stem before they are cut.
Double Mixed
Double Mixed is a blend selection that combines several fully double-flowered colors in a single seed packet, producing an assortment of 1 to 1.5 inch blooms in blue, pink, red, maroon, and white on plants reaching the classic tall cornflower height of 24 to 36 inches. Because it is a mix rather than a single named color, gardeners can expect a different ratio of shades from one packet to the next, though blue typically dominates. It typically flowers within 65 to 80 days of sowing, continues for 8 weeks or longer, and is popular for informal cutting gardens where a naturalistic, varied palette is more desirable than a single uniform color.
Blue Diadem
Blue Diadem is prized for producing some of the largest flowerheads of any cornflower type, with fully double, vivid blue blooms measuring up to 2 inches across on sturdy stems reaching 30 to 36 inches tall. The oversized blooms are held on notably thick, strong stems that resist bending even in wind, which sets this type apart from the wirier stems typical of smaller-flowered varieties. It flowers for 8 to 10 weeks once established and is a standout choice for cut flower production, since a single stem with its large flowerhead can serve as a focal point in an arrangement rather than needing to be bunched with several smaller blooms.
Emperor William
Emperor William is a classic heirloom type known for its vigorous growth, reaching 24 to 30 inches tall, and its abundant production of medium-sized, 1.25 inch, rich blue double flowers held on well-branched stems. This type has remained a popular heirloom choice for well over a century thanks to its reliability, disease resistance, and consistent germination rate, which growers report at close to 90 percent under good conditions. It flowers for 7 to 9 weeks and is frequently chosen by seed savers and heirloom gardeners specifically because its open-pollinated seed reliably produces true-to-type plants season after season.
Classic Romantic
Classic Romantic produces a soft mix of pale pink and red-toned blooms, both single and double forms measuring about 1.25 inches across, on plants reaching 20 to 28 inches tall with a loose, informal branching habit. The combination of flower forms within a single planting gives it a slightly wilder, more cottage-garden character than the uniform double blooms of most modern types. It flowers for 6 to 8 weeks and blends easily into cutting garden mixes, particularly those built around a romantic, soft color palette of blush, rose, and dusty red tones.
Purple Haze
Purple Haze features pale, semi-double blossoms about 1.5 inches wide in white or soft lilac tones, each centered with a contrasting deep purple core that gives the flower a hazy, two-toned effect, on stems reaching 24 to 28 inches. The semi-double form means each bloom shows slightly more of its central disc than a fully double flower, adding visual depth and making the purple center more prominent from a distance. It flowers for 7 to 9 weeks, giving gardeners a distinct alternative to the standard bright blue form, and its subtle coloring works particularly well in arrangements built around silver or gray foliage.
Florence Blue
Florence Blue is part of a well-regarded professional cutting series bred for uniform height, typically 24 to 28 inches, strong stems, and reliable, saturated blue blooms about 1.5 inches across. The series was developed specifically with commercial growers in mind, so plants within a row tend to reach flowering at nearly the same time, simplifying harvest scheduling. Its cut stems hold up for 7 to 10 days with minimal petal drop, making it a favorite among growers supplying florists and farmers markets who need dependable, uniform product.
Florence Pink
Florence Pink shares the same sturdy, uniform growth habit as its Florence series relatives, reaching 24 to 28 inches tall with consistent branching, but produces clear, bright pink blossoms measuring about 1.5 inches across instead of blue. Like the rest of the series it was bred for commercial reliability, with a high percentage of plants reaching harvestable stem length, generally 18 inches or more, within the same narrow flowering window. Its dependable performance and 7 to 10 day vase life make it a favorite among growers supplying cut flower markets who need a bright pink option to round out mixed bouquets.
Florence White
Florence White rounds out the Florence series with crisp white blooms about 1.5 inches wide on the same 24 to 28 inch stems, offering a clean, versatile color for mixed bouquets and monochromatic arrangements alike. Because it shares the series’ bred-in uniformity, growers can expect close to simultaneous flowering across a planting, simplifying harvest timing considerably compared to open-pollinated mixes. It flowers heavily for 8 weeks or more when cut regularly, and its stems typically hold 4 to 6 side branches capable of producing additional blooms after the main stem is harvested.
Florence Rose
Florence Rose produces deeper, rosier pink tones than its Florence Pink counterpart, with blooms around 1.5 inches across on stems reaching 24 to 28 inches and the same reliable branching structure found throughout the series. The richer rose coloring makes it a popular choice for arrangements that need a stronger, more saturated pink than the softer tone offered by Florence Pink. Like the rest of the series, it holds up for 7 to 10 days once cut and flowers for roughly 8 weeks under good growing conditions.
Florence Lavender
Florence Lavender offers a soft, cool-toned lavender bloom about 1.5 inches wide on the same reliable 24 to 28 inch stems found throughout the series, filling a color niche between the blue and pink options offered by its relatives. Its muted color and 7 to 10 day vase life make it especially popular in pastel-themed floral arrangements, and because it shares the series’ uniform flowering window, it is often planted alongside Florence Blue and Florence Pink for growers wanting a coordinated, multi-color harvest.
Tall Mixed
Tall Mixed is a classic blend selection that grows a full 30 to 36 inches in height, producing an assortment of 1 to 1.5 inch blue, purple, pink, red, and white blooms on long, sturdy stems well suited for cutting. A single packet typically yields 5 or more distinct colors, and because the plants grow tall and upright, they rarely need staking except in especially exposed, windy sites. It typically flowers within 65 to 80 days of sowing, continues for 8 to 10 weeks, and remains one of the most widely sold cornflower blends for casual cottage garden plantings.
Ball Blue
Ball Blue produces tightly rounded, fully double blue flowerheads about 1.5 inches across, similar in shape to the darker Black Ball type, on stems reaching 24 to 30 inches with moderate, even branching. The densely packed petals give each bloom a plush, spherical shape that holds together well even in wind or light rain, unlike some looser double forms. It flowers for 7 to 9 weeks and is a reliable performer for both garden display and cutting, typically producing 12 to 18 usable stems per plant over a full season.
Amethyst Dream
Amethyst Dream is a perennial type valued for its rich violet-purple blooms, roughly 2 inches across, held on compact, well-branched plants reaching 12 to 18 inches tall and spreading 15 to 18 inches wide. Unlike the annual types, it forms a persistent woody-based clump that returns reliably for 3 or more years, flowering for 4 to 6 weeks in late spring with a smaller rebloom of scattered flowers later in summer. Its silvery-green foliage remains attractive even out of bloom, making it a useful structural plant in a perennial border year-round.
Amethyst in Snow
Amethyst in Snow is closely related to Amethyst Dream but produces a striking bicolor effect, with white outer petals surrounding a 0.5 inch deep amethyst-purple center, on plants reaching 15 to 18 inches tall. The contrast between the white petals and dark center makes individual blooms stand out distinctly even from a distance, unlike the more uniformly colored flowers of most other perennial types. This perennial type flowers for 5 to 6 weeks and returns for multiple seasons, typically forming a slowly expanding clump that can be divided every 3 to 4 years to maintain vigor.
Gold Bullion
Gold Bullion is grown primarily for its foliage rather than its blossoms, featuring bright golden-yellow leaves on a low, spreading mound that reaches only 8 to 12 inches tall and up to 18 inches wide. The vivid foliage color holds through most of the growing season, brightening shaded corners of a border even when the plant isn’t in flower. Its blue flowers, about 2 inches across, appear for 4 to 5 weeks each spring atop the colorful foliage, creating a striking contrast between the cool blue blooms and the warm golden leaves beneath them.
Jordy
Jordy is a compact perennial type with true-blue flowers about 2 inches wide held on notably short, tidy stems reaching just 10 to 14 inches, forming a dense, low mound roughly 12 to 15 inches across. Its compact size makes it a good choice for the front of a border or a rock garden setting where taller perennial types would be out of scale. It returns reliably each year, flowering for 4 to 5 weeks slightly earlier than taller perennial types, and rarely requires staking or division more than once every 3 to 4 years.
Purple Heart
Purple Heart is an unusual perennial type with white outer petals surrounding a 0.5 inch deep amethyst center, on compact plants reaching 15 to 20 inches tall and spreading a similar distance. The two-toned bloom holds its contrast particularly well through the full flowering period, showing less fading than many other bicolor perennial types as the season progresses. It flowers for 5 to 7 weeks and holds its color well throughout the summer, making it one of the longer-blooming perennial types available.
Black Sprite
Black Sprite is a newer perennial hybrid with jewel-like, deep burgundy-black flowerheads about 2 inches across, held on tall, upright stems reaching 24 to 30 inches, well above the foliage clump below. Its more vertical growth habit sets it apart from the low, spreading mound typical of most perennial types, giving it a distinct presence toward the middle or back of a border rather than along the edge. Its striking dark color persists for 5 to 6 weeks each season, and the tall stems make it a useful, if unusual, addition to cut flower arrangements alongside its annual relatives.
Mountain Bluet
Mountain Bluet is the classic perennial cornflower, forming spreading clumps of silvery-green foliage up to 24 inches wide, topped with large, fringed blue blossoms measuring 2 to 3 inches across each spring. It is considerably longer-lived than the annual types, often persisting in a bed for 5 or more years without needing to be replanted, and its vigorous, spreading root system means a single planting can slowly widen into a substantial drift over time. It flowers for 4 to 6 weeks and is a common choice for naturalizing in perennial borders and cottage gardens across cooler regions of North America.
Violetta
Violetta is a perennial type bred for its rich violet-blue flowerheads, about 2 inches wide, on slightly more upright, controlled growth reaching 15 to 20 inches tall, a notable improvement in tidiness over the sometimes sprawling habit of the wild Mountain Bluet form. It blooms reliably for 4 to 5 weeks each spring, often with lighter rebloom into early summer if the spent flowerheads are trimmed back promptly. Its more restrained spread, typically staying within an 18 inch clump, makes it easier to place in a formal or mixed perennial border.
Grandiflora
Grandiflora is a perennial type selected for producing notably larger flowerheads than the standard Mountain Bluet form, measuring up to 3.5 inches across, on plants reaching 18 to 24 inches tall. The oversized blooms make individual flowers a genuine focal point rather than part of a general drift of color, and the plant’s foliage, wider and more robust than most perennial types, helps support the larger flower size. Its bigger blooms appear for 4 to 6 weeks each season and are often used as specimen plantings near a path or entrance where their scale can be appreciated up close.
Persian Cornflower
Persian Cornflower is a robust perennial type with large, finely divided, silver-backed leaves and vivid magenta-pink blossoms, roughly 2.5 inches across, that open from distinctive bronze buds in early summer. It forms an impressive mound of foliage up to 30 inches wide, considerably larger than most other perennial cornflower types, and can persist in a bed for 6 or more years with minimal maintenance once established. Its bold color and substantial size make it a popular specimen plant rather than a border filler, often planted alone where its architectural foliage can be fully appreciated even before the flowers appear.
Giant Knapweed Cornflower
Giant Knapweed Cornflower is among the largest types in the entire cornflower family, with sturdy stems reaching 3 to 4 feet tall topped by oversized, shaggy golden-yellow flowerheads measuring 3 to 4 inches across, a striking departure from the blue tones typical of most other types. Each flowerhead sits atop a distinctive, papery bud structure that adds ornamental interest even before the bloom opens. It flowers for 6 to 8 weeks and makes a striking back-of-border choice in perennial plantings, where its height and bold color can anchor a mixed bed without being overwhelmed by neighboring plants.
Basket Flower Cornflower
Basket Flower Cornflower is a tall, native North American annual type that produces large, thistle-like lavender-pink to white blooms, 3 to 5 inches across, on branching stems that can reach 5 to 6 feet under favorable growing conditions. The name comes from the woven, basket-like ring of tan bracts that cups each flowerhead from below, a feature unique among the different cornflower types. Its oversized flowerheads bloom for 8 to 10 weeks and are especially popular in prairie and wildflower meadow plantings across the central and southern United States, where the plant readily reseeds and naturalizes in open, sunny ground.