Mountain Bluet: A Stunning Perennial Flower

If you’re looking for a show-stopping perennial flower to add to your garden, look no further than the Mountain Bluet!

This stunning flower is native to Europe and the Mediterranean, and features blooms that resemble miniature pineapples.

The lance-shaped leaves are gray-green in color and contrast beautifully with the blue blooms. Some cultivars have flowers that are either white or a deep crimson color.

Although the Mountain Bluet prefers to be planted in the spring, it might take up to a year for it to mature. Once fully grown, this plant can colonize well and survive for up to 15 years!

Common Names Mountain cornflower, perennial cornflower, bachelor’s button
Botanical Name Centaurea montana
Family Asteraceae
Plant Type Perennial
Mature Size 1-2 ft. tall, 12-18 in. wide
Sun Exposure Full
Soil Type Well-drained
Soil pH Neutral
Bloom Time Spring, summer
Flower Color Blue, white, purple
Hardiness Zones 3-8 (USDA)
Native Area Europe

Tips for Keeping Your Plants Healthy

  • Water mountain bluet regularly, especially during hot, dry weather. Apply a layer of mulch around the base of the plant to help retain moisture in the soil.
  • Cut back the plant after it blooms to encourage new growth. Divide the plants every few years to keep them healthy and vigorous.
  • Fertilize mountain bluet once a year in early spring with a balanced fertilizer such as 12-12-12. Watch for pests and diseases such as powdery mildew and aphids.
  • Treat problems promptly with an appropriate pesticide or fungicide. Enjoy your stunning mountain bluet plants for many years to come!

Lighting and Temperature

The Mountain Cornflower prefers full sun but will also tolerate partial shade. It is a hardy plant that can survive in most climates, including cold winters and hot summers.


Soil type is also important for the Mountain Cornflower. It prefers well-drained soil that is not too alkaline.

If your soil is on the heavy side, you can improve drainage by adding some organic matter such as compost or aged manure.


Fertilizer is not typically necessary for mountain bluet; in fact, too much nitrogen can result in fewer flowers.

This plant does best in full sun but will tolerate partial shade, especially in hot summer climates.

It’s adaptable to a wide range of soils as long as the drainage is good—in overly wet soil, the roots will rot.


Pruning is necessary to encourage new growth and prevent the plant from becoming too leggy. It is best to prune in early spring, before the plant begins to produce new leaves.

To do this, cut back all of the stems to about six inches above ground level. This will promote bushier growth and more flowers.


The mountain cornflower is a drought-tolerant plant, however, it will need regular watering during its first growing season.

Once established, it will only need to be watered during periods of extended drought.


Size wise, Mountain Cornflowers can range anywhere from 12-36 inches in height (30-90 cm). They tend to bloom in early to mid summer, with each individual blossom lasting around a week.

If you’re planning on growing these beautiful flowers, they do best in well-drained soil that’s on the alkaline side. They also prefer full sun but can tolerate partial shade.


Flowering from late spring to early summer, mountain bluet is a stunning perennial that adds beauty and color to any garden.

With its lacy blooms and gray-green leaves, this plant is perfect for adding contrast and interest. Mountain bluet is also known as bachelor’s buttons or annual cornflower, and is native to Europe and the Mediterranean.

Common Pests & Plant Diseases

Mountain cornflower is a beautiful and hardy plant that can add color and interest to any garden. However, like all plants, it is susceptible to a variety of health problems.

Two of the most common problems associated with mountain cornflower are rust and mildew.

These fungal infections are not lethal, but they can cause the leaves of the plant to turn yellow or brown and can reduce its overall vigor.

To prevent these problems, it is important to ensure that your cornflower clumps have enough space between them to promote good airflow.

Additionally, you should trim back any dead or dying growth to improve airflow even further.

Aphids are another potential problem for mountain cornflowers. These tiny insects can quickly multiply and infest an entire field of plants.

However, they can be easily controlled with regular blasts from a garden hose. If aphids are still present after hosing, you can use a spritz of soapy water to kill any remaining insects.

Finally, stalk borers can occasionally infest mountain cornflower plants. The only indication of this problem is a wilting plant that does not recover when watered.

Propagating Mountain Cornflower

While mountain cornflowers are beautiful and low-maintenance, they can quickly take over your garden if left unchecked. One way to prevent the spread of this plant is to divide the clumps regularly.

This process can be done in the spring, when the first blooms appear. To divide a cornflower clump, simply use a spade or trowel to separate the root ball into smaller pieces.

Each piece should contain both roots and growth. You can then replant these divisions in other areas of your property, or give them away to friends and family members.

If you don’t have space to spare, you can also pot the divisions and enjoy them as indoor plants. By dividing cornflower clumps regularly, you can keep them under control and preserve their health.

Types of Mountain Cornflower

Mountain cornflowers come in several different varieties, each with its own distinctive color. Selecting a variety of mountain cornflower for your garden should be based on your gardening requirements and preferences.

Amethyst Dream is a beautiful variety of mountain cornflower with deep purple flowers and a darker center. It makes for a great border in any garden.

Another wonderful spreader that forms an excellent groundcover is Amethyst in the Snow. As the name suggests, it has white flowers that resemble fringes surrounding a purple center.

For something slightly different, try Alba which has white flower petals around a pink center. No matter which variety you choose, you are sure to have a beautiful and eye-catching addition to your garden.

Is Blue Cornflower invasive?

Blue cornflowers (Centaurea cyanus) are charming little flowers that have been widely cultivated as garden plants for centuries.

However, in recent years they have become increasingly problematic as an invasive species in certain parts of North America.

Cornflowers are very adaptable and can quickly spread into new areas, crowding out native plants. They are also difficult to control once established, as they produce a large number of seeds that are easily dispersed by birds and other animals.

As a result, cornflowers can pose a serious threat to native ecosystems. While they may be beautiful, it is important to exercise caution before planting them in your garden.

Do Cornflowers grow annually?

Cornflowers are annuals and will self-seed. If you plant an area or a field and allow cornflowers to self-sow, they will do so every year.

If you let a few seeds to dry on the plants towards the end this growing period they’ll self-sow to produce more cornflowers in the next.

The color of the cornflower is blue and it has cone-shaped blooms. It grows about 12 to 24 inches high and about 12 to 18 inches wide.

They need full sun but will tolerant some partial shade. These flowers have deep taproots that help them survive drought conditions.

When cutting cornflowers for bouquets, cut them when they are just beginning to open as they’ll continue to open in the vase. You can also deadhead spent blooms which will encourage more flowers.

Cornflowers attract bees and butterflies and make wonderful cut flowers.

Are blue Cornflowers perennials?

Blue cornflowers are a species of flowering plant in the daisy family. The scientific name for blue cornflower is Centaurea cyanus.

It is also commonly known by the names mountain cornflower, bachelor’s button, and perennial cornflower. Blue cornflowers are native to Europe and have been introduced to other parts of the world, including North America.

They are typically grown as an annual in northern climates and as a perennial in southern climates. Blue cornflowers typically grow to be about 1-2 feet tall and have blue or purple flowers that blooms in the summertime.

The flowers are often used in cut flower arrangements. The blue cornflower is also the state flower of Iowa and Illinois.

How do you plant cornflowers in a garden?

Cornflowers are an annual flower that will bloom throughout the summer. You can sow the seeds in early to mid-spring, or in fall in areas with mild winters.

For planting, choose a spot in your garden that gets full sun and has well-drained soil. Mark out a row or circle where you would like to plant the cornflowers, and make sure it is free of any weeds.

To sow the seeds, use your finger or a small rake to create indentations that are two inches (5 centimeters) apart and half an inch (1 centimeter) deep.

Sow three to five seeds per indentation, then lightly cover them with soil.

Once the seedlings have sprouted and grown to be about four inches (10 centimeters) tall, thin them so that they are eight inches (20 centimeters) apart in all directions.

This will give the cornflowers room to grow and also help prevent overcrowding.

Do cornflowers spread?

Cornflowers are annual or perennial plants that produce seeds after the flowers have died.

The seeds may germinate in the garden bed, and the flowers can also spread through the underground roots and stolons.

To prevent cornflowers from self-seeding in undesirable places, it is important to remove the flowers that have been used up before they begin to go to seed.

Perennial varieties of cornflower can also be propagated by division in spring or autumn. Cornflowers are usually low-maintenance plants, but they may need to be deadheaded to prevent them from self-seeding.

Is a cornflower a perennial?

Cornflowers are beautiful and popular flowers that are often used in bouquets and arrangements. Though they are commonly seen as annuals, cornflowers can actually be either annuals or perennials, depending on the species.

Annual cornflowers, such as Centaurea cyanus, will only bloom for one growing season before dying off. Perennial cornflowers, like Centaurea montana, will bloom for several years in a row with proper care.

So, whether you’re looking for a short-lived splash of color or a long-lasting addition to your garden, a cornflower might be the perfect choice.

Is a cornflower a perennial or annual?

The cornflower, also known as the bachelor’s button, is an annual flower. Annuals are plants that complete their life cycle in one growing season.

This means that they will sprout from seed, flower, produce seed, and die all within the span of a few months.

Cornflowers are popular garden plants because they are easy to grow and offer a wide range of colors. They are also relatively low-maintenance, which makes them a good choice for beginner gardeners.

With proper care, cornflowers will bloom from early summer until the first frost. After blooming has finished, the plant can be left in the ground to self-seed or it can be pulled up and discarded.

Will cornflower rebloom?

Cornflowers are beautiful, easy-to-grow flowers that can provide a stunning display in any garden.

Though they are often associated with the springtime, cornflowers can actually bloom from mid-May until mid-June, with a light rebloom later in the fall if the flowers are deadheaded.

Cornflowers are extremely tolerant of drought and can naturally grow in gardens with little to no maintenance. The flowers themselves are huge and long-lasting, making them a wonderful addition to any garden.

If you’re looking for a show-stopping flower that is sure to draw attention, cornflowers are an excellent choice.

Does cornflower reseed?

Cornflowers, or Centaurea cyanus, are beautiful annual flowers that were once a common sight in open fields across Europe and the United States.

Also known as bachelor’s buttons, these pretty flowers have been used in everything from bouquets to herbal teas.

One of the things that makes cornflowers so special is their ability to reseed themselves – meaning that they will come back year after year with very little effort on the part of the gardener.

Unfortunately, due to the increasing use of herbicides in fields, cornflowers are no longer able to reproduce naturally. This is a real shame, as cornflowers are not only beautiful but also easy to grow and care for.

With a little effort, we can all help to ensure that these special flowers continue to thrive for generations to come.

Where is the best place to plant cornflower?

Although cornflowers are hearty plants that can tolerate a wide range of growing conditions, they will produce the best blooms when they are given full sun and rich, well-drained soil.

For best results, prepare the planting bed by turning the soil to a depth of 8 inches and incorporating plenty of organic matter. Once the bed is prepared, direct sow the seeds in rows or simply broadcast them over the area.

Thin the seedlings to 12 inches apart once they have emerged. Cornflowers are drought tolerant once they are established, but they will perform best if they are given a consistent supply of water during the blooming period.

With a little care, cornflowers will provide weeks of colorful blooms that are sure to brighten any garden.

Jessica Miles

Jessica Miles is a writer for Botanique Boutique, a plant and gardening blog. She has always loved plants, flowers, and anything green. When she was younger, she used to watch her grandfather garden and would be in awe of the beautiful flowers he would grow. Now Jessica writes about all things related to plants and gardening - from beginner tips on how to start growing your own plants, to in-depth guides on caring for a specific type of flower or plant. She loves helping others learn about this fascinating hobby, and hopes that her writing will inspire people to get outside and enjoy nature!

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