4 Tall Annual Flowers

Written by Crystal
Updated: August 22, 2023
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When it comes to tall annual flowers, sunflowers are hard to beat.

Towering over most other annuals, sunflowers can grow to heights of six feet or more! Their height is one of the ways they maximize exposure to the sun. The stalks of the sunflower plant grow directly up from the root, with the seeds facing outward to capture as much sunlight as possible. Additionally, the flowers on a sunflower plant mature one at a time from the bottom to the top, so the older flowers are always getting direct light.

There are a lot of fascinating towering flowers you should learn about. Who knows, maybe you’ll even add a few to your garden! Read on to discover some of the best varieties!

1. Delphinium

Candle Delphinium

Delphinium grows to about three feet tall.


Delphinium is an annual flower popular for its tall stature and beautiful blooms. It’s one of the best annual flowers if you want height. The plant typically grows to be about three feet tall. Delphiniums are also one of the most vibrant tall annual flowers you can add to your garden. Also known as larkspur, these flowers come in a wide range of colors, including blue, purple, pink, and white.

If you’re thinking about planting a delphinium garden, there are a few things to keep in mind. First, delphiniums require full sun and well-drained soil. They also need to stay moist, so be sure to water them regularly.

When it comes to planting, it’s best to start with young plants or seeds. Delphiniums can thrive if you plant them in the spring or fall, and they typically bloom in late spring or early summer. For gardeners who want to do their part to help the environment, delphinium is a great choice. Delphinium is also a great choice for attracting bees and other pollinators. The tall flowering stalks make it easy for bees to access the nectar, and the plants are also a great pollen source. As a result, delphinium can play an important role in supporting local ecosystems.

2. Snapdragon

Snapdragons. Snapdragon pink flowers in the garden. Spring and summer background. Vertical photo

Some varieties of snapdragons can be up to three feet tall.


Snapdragons are one of the most popular flowers for gardens and bouquets. They come in a wide range of colors, from pastel pink to deep burgundy, and they have a unique split-petal design that gives them a whimsical look. Snapdragons are also relatively easy to care for, and they bloom abundantly throughout the spring and summer months. In addition, snapdragons have a long flowering season, meaning they will often still be blooming even when other flowers have begun to fade. These factors combine to make snapdragons one of the most beloved flowers among gardeners and floral designers.

How tall do they grow? The answer is that it depends on the variety. Some varieties can reach up to three feet tall, while others stay relatively short, only growing to about one foot tall.

3. Lupine

many lupine flowers in garden

Lupines look great in gardens and can be up to four feet tall.

©Amel PhotographyDz/Shutterstock.com

Lupine annuals are a type of flower that blooms for only one season. They are native to temperate regions of the Northern Hemisphere, and their name comes from the Latin word for “wolf.” Lupines are typically herbaceous plants with compound leaves and showy flowers that range in color from white to purple. The most common species of lupine in North America is the wild blue lupine (Lupinus perennis).

Lupines are popular for their ability to adapt to poor soils and dry conditions, and they are often used as cover crops or green manure. One of the most interesting things about lupines is that they contain alkaloids that can be toxic to livestock. However, these same alkaloids can also be beneficial to humans. For instance, they might have anticancer, anti-inflammatory, and antioxidant properties. Lupines are truly amazing plants, and they have a lot to offer both to people and the environment.

How tall do lupine flowers get? Lupine flowers can grow to be four feet tall. However, not all varieties grow the same way. Others are much shorter, only growing a few inches. The reason for this difference is that lupines can be either annual or perennial plants.

Annual lupines only live for one growing season, so they don’t have time to grow as tall as their perennial cousins. However, both varieties of lupines are popular for their long taproots, which help them to survive in dry conditions. So whether you’re growing a tall or short lupine, you can rest assured that it will have a deep root system to help it thrive.

4. Bachelor Button

Bachelor's Button

If well cared for, bachelor button flowers can be up to three feet.


Bachelor button flowers, also known as Centaurea cyanus, are annual plants that typically grow to be about two feet tall. However, they can sometimes grow taller than three feet if they are well-cared for. The flowers themselves are usually a deep blue color, but they can also occur in pink, purple, and white.

Bachelor button flowers are native to Europe and Asia, but they’ve been in cultivation in North America for centuries. They’re a type of exotic annual with close relations to yellow starthistle. Sometimes they go by the name cornflower. Today, they are often grown as ornamental plants, and they are also a popular choice for cut flowers. Bachelor button flowers typically bloom in the spring or early summer, and they will continue to bloom until the first frost of the season.

The best time to plant bachelor buttons is in the spring. They prefer full sun and well-drained soil. If you live in an area with a lot of rainfall, it’s best to plant them on a hill or raised bed, so they don’t sit in water. You can start them from seed or buy seedlings from a nursery. Bachelor button flowers are annuals, so they will only last one growing season. But if you deadhead them regularly, they will produce showy blooms.

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The photo featured at the top of this post is © iStock.com/yuelan

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About the Author

Crystal is a dedicated writer at A-Z Animals, focusing on topics related to mammals, insects, and travel. With over a decade of experience in the world of research and writing, she also fulfills the role of a skilled video and audio engineer. Residing in sunny Florida, alligators are Crystal's favorite animal.

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