These 23 Colorful Perennials Double in Size Every Year — Gardeners Are Obsessed

Plant Care
By John Miller

Perennial plants are a gardener’s delight, offering vibrant colors and the promise of growth year after year. Known for their resilience and beauty, these plants not only enhance the aesthetics of any garden but also promise expansion as they double in size annually. This characteristic makes them a favorite among gardening enthusiasts who appreciate the visual delight and the easy maintenance they offer. With a plethora of choices, each plant boasts unique traits, tantalizing hues, and growth patterns that make them a must-have in any green space. Let’s explore 23 such perennials that captivate with their charm and growth.

1. Daylily

© Sixteen Acres Garden Center

Daylilies are often called the “perfect perennial” due to their adaptability and long blooming season. These vibrant flowers come in a range of colors, from sunny yellows to deep purples. Gardeners adore their ability to thrive in various conditions, making them a staple in mixed borders.

The daylily’s hardy nature and minimal care requirements are complemented by their stunning floral display. Each bloom lasts just a day, but they bloom in succession, ensuring a continuous show.

Did you know? Despite their name, daylilies are not true lilies, but they bring equal charm.

2. Hydrangea

© Brighter Blooms

Hydrangeas are famous for their large, spherical flower clusters that change color based on soil pH. Their flowers can range from pink to blue, creating a mesmerizing effect in any garden. Known for their dramatic presence, hydrangeas can double in size quickly with the right care.

These plants are perfect for creating a statement in garden landscapes, drawing attention with their voluminous blooms. The longevity of their flowers adds to their appeal, making them a favorite for floral arrangements.

Fun fact: The color-changing ability of hydrangeas makes them an exciting choice for gardeners.

3. Peony

© Martha Stewart

Peonies, with their lush, ruffled blooms and intoxicating fragrance, are a beloved choice for many gardeners. These perennials are as resilient as they are beautiful, often taking center stage in garden beds.

Their blooms can be as large as dinner plates, offering a visual feast of pinks, reds, and whites. Once established, peonies require little maintenance, rewarding gardeners with an annual display that doubles in grandeur each year.

Originating from Asia, peonies have been cultivated for centuries, symbolizing wealth and honor in various cultures.

4. Lavender

© White Flower Farm

Lavender is synonymous with tranquility, known for its soothing scent and rich purple spikes. This perennial is a favorite in gardens for its ability to attract pollinators and its drought-resistant properties.

Once planted, lavender requires minimal care, expanding its reach with each passing year. Its silvery foliage and upright blooms create a striking contrast in landscapes, offering both beauty and utility.

Lavender’s calming fragrance is often used in essential oils and sachets, making it a versatile plant beyond its ornamental value.

5. Coneflower

© High Country Gardens

Coneflowers, also known as Echinacea, are a staple for any perennial garden due to their robust nature and vibrant hues. These flowers are renowned for their immunity-boosting properties and their ability to attract butterflies and bees.

Their daisy-like appearance and long blooming period make them a favorite for gardeners looking to add color and life to their gardens. Coneflowers are remarkably resilient, thriving in various soil conditions and expanding their presence each year.

The medicinal properties of coneflowers have been valued in herbal remedies across generations.

6. Black-Eyed Susan

© Better Homes & Gardens

Black-Eyed Susans are cheerful, daisy-like perennials that bring a burst of yellow to any garden. Known for their striking dark centers and sunny petals, these flowers are both beautiful and easy to grow.

Their adaptability to different soil types and climates makes them a popular choice for gardeners seeking low-maintenance blooms. As they double in size, they create a tapestry of gold that brightens any landscape.

Black-Eyed Susans are also a symbol of encouragement and motivation, often seen as a reminder to embrace the sunny side of life.

7. Hosta

© White Flower Farm

Hostas are renowned for their lush foliage, offering a wide range of leaf colors, shapes, and textures. They are shade-loving perennials that add depth and interest to garden beds.

The ability of hostas to thrive in less sunny spots makes them invaluable to gardeners seeking greenery in shaded areas. Their leaves can range from deep green to variegated patterns, providing visual interest throughout the growing season.

Hostas are a testament to the beauty of foliage, showing that flowers aren’t the only stars in a garden.

8. Bee Balm

© How Sweet It Is

Bee Balm, also known as Monarda, is a magnet for pollinators such as bees, butterflies, and hummingbirds. Its vivid red, pink, or purple tubular flowers add a splash of color to any garden.

This perennial thrives in sunny locations and is known for its ability to spread rapidly, creating colorful displays year after year. Gardeners value bee balm for its aromatic foliage and its role in supporting beneficial insects.

Historically, bee balm was used by Native Americans for its medicinal properties, adding cultural significance to its beauty.

9. Astilbe

© Walmart

Astilbes are admired for their feathery plumes and fern-like foliage, providing elegance to shade gardens. These perennials thrive in moist, well-drained soils, creating a lush carpet of color during their bloom.

The soft pinks, reds, and whites of astilbe flowers add a romantic touch to borders and beds. They are perfect for gardeners seeking to add texture and color to less sunny spots.

Astilbes not only beautify gardens but also offer versatility, as their dried flowers can be used in arrangements.

10. Salvia

© All-America Selections

Salvia, with its tall, elegant spikes, brings a vertical element to garden designs. Known for their rich blue and purple hues, these perennials are excellent for attracting hummingbirds and bees.

Salvias are drought-tolerant, making them ideal for low-maintenance gardens. Their ability to thrive in sunny locations and their long blooming period ensure year-round interest.

In addition to their beauty, salvia plants have culinary uses, with some varieties providing aromatic leaves for flavoring dishes.

11. Coreopsis

© The Spruce

Coreopsis, often called tickseed, is cherished for its bright, daisy-like flowers that bloom abundantly. These perennials are resilient and easy to care for, making them a go-to choice for gardeners aiming for a burst of color.

Their vibrant yellows and reds create a lively atmosphere, attracting butterflies and birds. Coreopsis can thrive in various soil conditions, multiplying rapidly to provide extensive ground coverage.

With their sunny disposition, coreopsis flowers are a reminder of summer’s warmth and the joy it brings to outdoor spaces.

12. Sedum

© Bluestone Perennials

Sedums, or stonecrops, are versatile perennials known for their succulent leaves and star-shaped flowers. They thrive in rocky, well-drained soils, adding texture and color to rock gardens and borders.

Available in a range of sizes and colors, sedums provide year-round interest, from their vibrant blooms to their attractive foliage. They are drought-tolerant and require minimal maintenance, spreading effortlessly over time.

Sedums are often used in green roofs and living walls, showcasing their adaptability and environmental benefits.

13. Phlox

© Amazon.com

Phlox is celebrated for its fragrant, star-shaped flowers that blanket gardens in vibrant clusters. These perennials are perfect for creating colorful carpets in sunny or partial-shade areas.

Phlox varieties offer a wide color palette, from bright pinks to soft pastels, attracting butterflies and hummingbirds. Their long blooming season and lush growth make them a staple in cottage gardens.

Did you know? The name “phlox” comes from the Greek word for flame, reflecting the plant’s brilliant colors.

14. Liatris

© American Meadows

Liatris, also known as blazing star, is a striking perennial with tall, feathery flower spikes. Its blooms range from purple to white, adding a vertical accent to garden compositions.

These flowers are beloved by pollinators and are known for their drought-resistant properties, making them ideal for sustainable gardens. Liatris plants are easy to grow, expanding their presence with each season.

Their unique appearance and resilience make liatris a favored choice for wildflower gardens and naturalistic landscapes.

15. Japanese Anemone

© Gardeners’ World

Japanese Anemones, with their delicate blooms and graceful presence, are a favorite for autumn gardens. These perennials offer a late-season splash of color, extending the floral display into fall.

The soft pinks and whites of Japanese anemones are perfect for adding elegance to shaded or woodland gardens. Their ability to naturalize quickly makes them a charming addition that expands over time.

Japanese Anemones have been cultivated in gardens for centuries, valued for their beauty and adaptability.

16. Heuchera

© Vermont Public

Heucheras, or coral bells, are prized for their stunning foliage, which comes in an array of colors including burgundy, green, and gold. These perennials are perfect for adding year-round interest to garden beds.

Their charming, bell-shaped flowers attract hummingbirds, while their vibrant leaves provide a constant display of color. Heucheras thrive in partial shade and are adaptable to different soil types.

Beyond their beauty, heucheras are also known for their resilience, making them a reliable choice for diverse garden settings.

17. Gaillardia

© High Country Gardens

Gaillardia, commonly known as blanket flower, is admired for its fiery blooms that resemble a sunset. These perennials are drought-tolerant and easy to grow, making them a favorite for low-maintenance gardens.

Their vibrant red and yellow petals attract pollinators and provide a long-lasting display of color. Gaillardia plants thrive in sunny locations, doubling in size and impact each year.

The cheerful appearance of blanket flowers brings a touch of the wild prairie to any garden, celebrating nature’s vibrant palette.

18. Yarrow

© Gardenia.net

Yarrow is a versatile perennial known for its clusters of tiny flowers and fern-like foliage. Its blooms, in shades of yellow, white, and pink, create an airy, meadow-like effect.

This hardy plant thrives in poor soil conditions, making it ideal for naturalistic and wildflower gardens. Yarrow attracts beneficial insects, contributing to a healthy garden ecosystem.

Historically, yarrow has been used for its medicinal properties, adding an intriguing layer to its ornamental value.

19. Russian Sage

© Monrovia

Russian Sage, with its tall, aromatic flower spikes and silvery foliage, is a standout in any garden. These perennials are known for their drought resistance and ability to thrive in full sun.

Their lavender-blue flowers add a soft, wispy texture to landscapes, creating an ethereal effect. Russian Sage plants are low maintenance, offering a long season of interest as they expand their reach annually.

The plant’s aromatic qualities are not only pleasant but also deter pests, making it a beneficial addition to gardens.

20. Veronica

© American Meadows

Veronica, or speedwell, is a versatile perennial known for its slender spikes of flowers. Available in shades of indigo, white, and pink, veronica adds vertical interest to garden designs.

These plants are loved for their long blooming season and ability to attract pollinators. Veronica is easy to grow, adapting to a variety of soil conditions and expanding gracefully each year.

The elegant form of veronica flowers brings a touch of refinement to mixed borders and garden paths.

21. Lupine

© Easy To Grow Bulbs

Lupines, with their tall, spiky blooms, are a striking addition to any garden. These perennials are celebrated for their vibrant colors, ranging from deep purples to bright pinks and whites.

Lupines are nitrogen-fixers, enriching the soil and benefiting neighboring plants. Their unique foliage and flower structure make them a favorite for naturalistic and cottage garden designs.

The dramatic presence of lupines adds a sense of grandeur, transforming ordinary landscapes into vibrant canvases.

22. Delphinium

© Bluestone Perennials

Delphiniums, with their towering spires of flowers, are a breathtaking addition to perennial gardens. Known for their rich blues and violets, these plants create a vertical spectacle that captivates.

Their showy blooms are perfect for formal garden designs, providing structure and elegance. With proper care, delphiniums can thrive and expand, doubling their display each year.

Delphiniums have a storied history in horticulture, often featured in estate gardens for their stately appearance.

23. Baptisia Australis

© Patuxent Nursery

Often called False Indigo, Baptisia Australis is a perennial charmer with deep indigo-blue flowers. Known for its resilience, this plant thrives in sunny spots, revealing pea-like blossoms each spring. Its bushy form and lush green leaves add structure to any garden.

With each passing year, these perennials expand, creating a more vibrant display. Ideal for those seeking low-maintenance beauty, the Baptisia requires minimal care, yet offers maximum impact.

Did you know? Native Americans once used the dye from its flowers as a substitute for true indigo. This historical tidbit adds allure to an already captivating plant.