15 Colorful Biennial Flowers to Grow

1

Digitalis

PicturePartners//Getty Images

Foxgloves are beautiful flowers. They are one of the best known and most loved biennials. In their second year, they produce tall spikes of colorful, dreamy, tubular flowers that usually bloom in late spring to early summer. They like partial shade and well-drained soil.

Related: 25 Best Shade Plants to Beautify Your Garden

2

Hollyhock

Pink and white hollyhock flowersNipastock // Getty Images

Once established, hollyhocks will produce large, showy flowers on tall stems in the second summer. They thrive in full sun, but because of their height they will need staking. Watch out for common rust diseases.

Related: 32 Best Sunny Plants and Flowers to Plant in Your Garden

3

Carrot

Potted carrotsVictoria Pearson // Getty Images

Have you ever returned to your vegetable patch in the spring to discover carrots growing that you didn't realize you'd planted? These vegetables typically produce a harvest in their first year, but if left alone, will flower in their second year.

Related: Companion Planting Guides and Charts

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Four

parsley

Parsley growing on a farmYuri Garmash // Getty Images

Parsley is often grown as an annual, meaning it will flower and produce fruit the second year, meaning you'll need to replant it each spring if you want to continue using it in your cooking. Parsley likes full sun and is fairly hardy.

Related: 15 of the Best Herb Gardens to Grow Indoors, Tested and Reviewed

Five

Sweet William

A vibrantly colored cluster of Sweet WilliamJudy Dix // Getty Images

These flower clusters are easy to plant from seed, and in the second year they will produce a burst of fragrant pink and white flowers in late spring to early summer. Don't forget you planted them – they require well-drained soil and deadheading to extend the blooming season.

Related: The Definitive Guide to Picking Flowers

6

Evening primrose

Narrow Leaf Evening PrimrosePeter Zeray Images // Getty Images

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7

Black Eyed Susan

Yellow CornflowerAli Majidfar // Getty Images

These vigorous flowers with bright yellow petals and black centers are often found amongst clusters of wildflowers along highways, blooming from midsummer through the second fall. They require little care and thrive in full sun and well-drained soil.

Related: Chaos Gardening is the Easiest Way to Grow Flowers

8

teasel

Milk thistle with leavesAli Majidfar // Getty Images 9

Campanula

Large cluster of Campanula patula flowers on the Crinan Canal in the Scottish HighlandsFei-Fei Cui Paoruzzo // Getty Images

Campanulas are vigorous growers that produce beautiful purple and white bell-shaped flowers from late spring to early summer. Also known as Canterbury bells, they prefer partial shade and moist, well-drained soil. Pruning the flowers will encourage more flowers and extend the flowering season.

Related: The Definitive Guide to Picking Flowers

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Ten

Cow Parsnip

A wasp parasitizing cow parsnipAli Majidfar // Getty Images 11

Honesty

LunariaPeng Song // Getty Images

Also known as Lunaria, this pretty purple flower with paper-thin blooms comes into full bloom in late spring in its second year. It prefers partial shade and well-drained soil. The deep, black seed pods are perfect for dried flower arrangements.

Related: 25 Best Shade Plants to Beautify Your Garden

12

Angelica

Angelica flower in the gardenviti//Getty Images

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13

Queen Anne's Lace

carrotAlbert Feltl // Getty Images

This beautiful and delicate flower is often considered a wildflower. In fact, each flower is a cluster of thousands of tiny white flowers. Queen Anne's Lace grows up to 4 feet tall. It is a great pollinator plant that attracts butterflies and bees.

Related: 50 Beautiful White Flowers to Plant in Your Garden

14

Forget-me-not

don't forgetErland Grotberg // Getty Images

This adorable blue flower may be described as a perennial, but it's usually a biennial. It grows close to the ground, but grows quickly in full sun or partial shade and moist, well-drained soil. The flower buds that bloom in the second summer are actually pink, making it a great way to introduce a variety of color to your flower bed.

Related: 20 Flower Meanings and Symbolism for 2024

15

Sweet Rocket

A black swallowtail butterfly resting on a sweet rocket flowerSue D.L. Smith // Getty Images

These purple flowers, which have a sweet fragrance similar to that of violets, bloom in early spring, just after bulbous plants such as daffodils begin to sprout. They grow well in full sun to partial shade and are a staple in the cottage garden, attracting butterflies and bees.

Related: 12 Early Spring Flowers to Plant in Your Garden

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