Gardeners Were Wrong About These 31 Perennials — New Research Reveals Best Timing

Plant Care
By John Miller

New research has unveiled surprising insights into the optimal timing for planting 31 popular perennials. Traditionally, gardeners have followed specific schedules, but recent findings suggest adjustments that could enhance growth and bloom. Explore the detailed revelations for each perennial, focusing on how tweaking the planting schedule can lead to thriving gardens. This comprehensive guide provides a fresh perspective on each plant, supported by science-backed recommendations. Discover the secrets to healthier, more vibrant perennial gardens, and learn how to apply these insights to your gardening practices.

1. Peony

© Martha Stewart

Peonies, known for their dramatic blooms and fragrant presence, often grace gardens in late spring. Recent studies suggest that planting these perennials in early fall, rather than late, ensures better root establishment. This timing captures the period before frost, allowing roots to settle. Imagine the joy of seeing peonies flourish with fuller blooms. Notably, this adjustment can lead to increased resistance against pests and diseases. Additionally, new gardeners may find this timing beneficial, as it reduces the stress on plants. Embrace this change and witness your peonies thrive like never before.

2. Daylily

© Gardeners’ World

Daylilies, loved for their colorful and resilient nature, have long been a staple in gardens. Traditionally planted in early spring, research now points to late summer as the ideal time. This shift allows daylilies to establish roots before the fall frost, promoting robust growth. Enthusiastic gardeners might note the early blooms in subsequent seasons. This timing also aligns with the plant’s natural cycle, enhancing its vibrant display. By adjusting your planting schedule, you not only extend the blooming period but also support healthier plant development.

3. Hosta

© Bulb Blog

With their broad, lush leaves, hostas are the unsung heroes of shady gardens. While often planted in spring, experts now recommend an early fall schedule. This timing supports root growth during cooler months without the harshness of summer heat. Hostas benefit from this shift with increased vigor and resilience. Gardeners might find themselves surprised by the enhanced size and color intensity of leaves. Moreover, this adjustment can reduce slug damage. By planting hostas in early fall, you set the stage for a more robust and eye-catching presence.

4. Lavender

© Botanical Interests

Lavender’s calming scent and stunning purple flowers make it a garden favorite. Traditionally planted in spring, new insights suggest early fall planting enhances its development. This period allows roots to establish firmly before winter, leading to stronger plants. Lavender enthusiasts will appreciate the increased bloom density and aromatic intensity in the following seasons. Furthermore, this timing aligns with the natural lifecycle, supporting sustainable growth. By embracing this update, gardeners can enjoy more fragrant blooms while ensuring their lavender remains healthy and vibrant.

5. Black-eyed Susan

© Better Homes & Gardens

Black-eyed Susans, known for their cheerful yellow blooms, have traditionally been planted in spring. However, research indicates a late summer planting can yield better results. This timing allows the plants to establish before winter, enhancing their resilience. Gardeners might notice a more vibrant display the following year. The adjustment also supports better pest resistance and bloom longevity. By aligning the planting schedule with the plant’s natural cycle, black-eyed Susans can thrive. Welcome this change and enjoy a garden bursting with sunny blooms year after year.

6. Coneflower

© Dennis’ 7 Dees

Beloved for their hearty nature and attractive blooms, coneflowers have been a garden favorite. Traditionally planted in spring, shifting to a late summer schedule is now recommended. This change allows for optimal root development, resulting in healthier plants. Gardeners will find this adjustment supports more vivid blooms and increased pollinator activity. The updated timing aligns with the plant’s growth cycle, promoting resilience against adverse weather. Embrace this insight and experience a garden filled with robust coneflowers, captivating both in appearance and ecological benefits.

7. Bleeding Heart

© Garden Design

Bleeding hearts, with their romantic and delicate blooms, traditionally grace gardens in spring. Current studies suggest an early fall planting schedule enhances their growth. This timing allows for better root establishment and prepares the plant for spring’s demands. Gardeners might find the blooms more abundant and vibrant. Additionally, this shift supports the plant’s natural lifecycle, reducing stress and increasing lifespan. By planting bleeding hearts in early fall, you set the stage for a breathtaking display that captivates every spring.

8. Coral Bells

© Growcycle B2B marketplace

Coral bells, admired for their striking foliage, have traditionally been spring additions. New research advocates for an early fall planting. This timing supports robust root growth in cooler climates, enhancing the plant’s vitality. Gardeners may notice fuller, more colorful leaves and improved resistance to pests. The adjustment aligns with the plant’s natural cycle, maximizing its decorative appeal. By changing the planting schedule, coral bells can shine brighter in your garden, offering a visual treat throughout the seasons.

9. Shasta Daisy

© Olson’s Greenhouse

Shasta daisies, with their cheerful, classic blooms, often mark the beginning of summer. Traditionally planted in spring, an early fall schedule now proves more beneficial. This timing ensures their roots are well-established before winter’s chill. Gardeners might observe more robust plants and longer bloom periods. By aligning with the plant’s growth cycle, these daisies can offer a more vibrant presence. Embrace this change to enjoy a garden filled with the timeless beauty of Shasta daisies that thrive season after season.

10. Astilbe

© Planet Natural

Astilbes, with their feathery plumes, have traditionally been planted in spring. However, new findings suggest early fall as the ideal time. This timing allows roots to take hold before the winter, reducing stress and enhancing growth. Gardeners will find that astilbes produce more vigorous plants with fuller plumes. The adjustment also supports better moisture retention, crucial for their development. By planting astilbes in early fall, you create a more robust and enduring display that enchants every season.

11. Hellebore

© The Spruce

Hellebores, often called Christmas roses, bring color to winter gardens. Traditionally planted in spring, new research advocates for late summer planting. This timing allows them to anchor roots before the cold sets in. Gardeners might notice earlier blooms and increased resilience against winter’s harshness. The shift in schedule also aligns with the plant’s development cycle, supporting healthier growth. By adapting to this advice, your hellebores can offer a more impressive winter show, brightening your garden during colder months.

12. Sedum

© Gardener’s Path

Sedums, known for their hardy and drought-tolerant nature, have long been spring staples. Recent insights recommend late summer planting. This timing allows for optimal root establishment before winter, ensuring robust growth. Gardeners might appreciate the fuller foliage and increased bloom density. Aligning with the plant’s natural cycle, this change reduces transplant shock. By planting sedums in late summer, you encourage a flourishing garden, even in challenging conditions, with sedums displaying their resilience and beauty.

13. Russian Sage

© Better Homes & Gardens

With its silvery foliage and lavender blooms, Russian sage adds elegance to any garden. Traditionally planted in spring, experts now suggest a late summer schedule. This timing ensures better root establishment, leading to stronger, more resilient plants. Gardeners might find the blooms more prolific and the plant’s aroma more intense. The adjustment also supports the plant’s natural growth cycle, enhancing its ornamental appeal. By planting Russian sage in late summer, you can enjoy a more robust display throughout the garden season.

14. Phlox

© Gardener’s Path

Phlox, with its vibrant clusters of flowers, traditionally graces gardens in spring. However, an early fall planting is now recommended for optimal growth. This timing allows the plant to establish roots before winter’s arrival, promoting healthier blooms. Gardeners might notice an extended flowering season and more vivid colors. By aligning with the plant’s natural cycle, phlox can thrive with less stress. Embrace this new timing to enjoy a garden bursting with color, where phlox stands out as a bright and cheerful presence.

15. Japanese Anemone

© Gardeners’ World

Japanese anemones, admired for their grace and beauty, have been springtime favorites. New studies suggest early fall as the best planting time. This adjustment allows roots to settle before the cold, enhancing resilience and bloom quality. Gardeners might experience a more prolonged flowering period and increased plant vigor. The shift aligns with the plant’s lifecycle, supporting sustainable growth. By embracing this insight, you ensure your anemones capture attention with their delicate beauty, season after season.

16. Yarrow

© Stacy Ling

Yarrow, known for its medicinal properties and hardy blooms, traditionally finds its place in spring gardens. However, late summer planting is now advised for better results. This timing helps the plant establish roots before winter, fostering stronger growth. Gardeners might notice increased bloom density and improved resilience against pests. The change aligns with yarrow’s natural cycle, supporting its long-term health. By adjusting the planting schedule, you cultivate a garden where yarrow thrives, offering its unique charm throughout the seasons.

17. Salvia

© Stacy Ling

Salvia, with its vibrant spikes of flowers, has often been a spring addition. New research recommends an early fall planting to optimize growth. This timing ensures better root development, leading to fuller, more fragrant blooms. Gardeners might appreciate the extended flowering period and increased pollinator attraction. Aligning with the plant’s natural cycle reduces stress and enhances resilience. By planting salvia in early fall, you set the foundation for a more lively and engaging garden display that delights throughout the growing season.

18. Bee Balm

© The Spruce

Bee balm, beloved by pollinators, traditionally graces gardens in spring. However, an early fall planting is now recommended for better results. This timing allows the plant to establish before winter, promoting vigorous growth. Gardeners might notice an increase in bloom size and pollinator activity. By aligning with the plant’s lifecycle, bee balm can thrive with more resilience and vibrancy. Embrace this updated schedule to enjoy a garden buzzing with life, where bee balm takes center stage with its striking presence.

19. Clematis

© Bulb Blog

Clematis, with its climbing habit and large blooms, traditionally finds its place in spring gardens. New recommendations suggest early fall planting for optimal growth. This timing supports root development, leading to healthier vines and more prolific blooms. Gardeners might appreciate the longer flowering season and increased resilience against pests. The adjustment aligns with the plant’s natural cycle, enhancing its ornamental appeal. By embracing this insight, clematis can transform your garden into a vertical paradise, brimming with vibrant flowers.

20. Lupine

© The Plant Native

Lupines, known for their towering spires and variety of colors, are often springtime additions. However, planting in early fall is now recommended. This timing allows roots to settle before winter, supporting robust growth and bloom density. Gardeners might notice an increase in color vibrancy and plant vigor. By aligning with the plant’s lifecycle, lupines can thrive with more resilience. Embrace this change to enjoy a garden where lupines stand tall, adding a bold splash of color that captivates every season.

21. Foxglove

© Southern Living

Foxgloves, with their dramatic, towering blooms, have traditionally been spring favorites. New insights suggest early fall planting for enhanced growth. This timing ensures better root development, leading to stronger plants with more abundant blooms. Gardeners might notice an extended flowering period and increased resilience against pests. By aligning with the plant’s natural cycle, foxgloves can thrive with less stress. Embrace this adjustment to enjoy a garden where foxgloves add height and elegance, creating a stunning visual impact.

22. Brunnera

© Epic Gardening

Brunnera, often appreciated for its heart-shaped leaves and delicate blue flowers, is usually planted in spring. However, early fall planting is now recommended. This timing allows for optimal root establishment, promoting healthier, more vigorous growth. Gardeners might notice increased foliage density and improved resilience against pests. Aligning with the plant’s natural cycle reduces stress and enhances ornamental appeal. By planting brunnera in early fall, you ensure a garden filled with its enchanting presence, captivating visitors with its subtle beauty.

23. Pulmonaria

© Bluestone Perennials

Pulmonaria, known for its speckled foliage and early blooms, traditionally marks the beginning of spring. However, an early fall planting is now advised. This timing helps roots establish before winter, supporting robust growth and bloom intensity. Gardeners might appreciate the increased foliage vibrancy and extended flowering season. The adjustment aligns with the plant’s natural cycle, enhancing its resilience and decorative appeal. By planting pulmonaria in early fall, you cultivate a garden where its unique charm flourishes, brightening shaded areas.

24. Geranium

© Gardeners’ World

Hardy geraniums, cherished for their versatility and colorful blooms, are often spring plants. New findings suggest early fall planting for optimal results. This timing supports better root establishment, leading to more vigorous plants and prolonged flowering. Gardeners might note increased bloom density and enhanced resistance to pests. By aligning with the plant’s natural cycle, geraniums can thrive with reduced stress. Embrace this update to enjoy a garden where hardy geraniums add a splash of color and charm, delighting throughout the seasons.

25. Veronica

© Farmer’s Almanac

Veronica, with its spiky blooms and compact habit, traditionally graces gardens in spring. However, early fall planting is now recommended for better results. This timing helps establish roots before winter, supporting healthier growth and bloom density. Gardeners might appreciate the extended flowering period and increased pollinator attraction. Aligning with the plant’s natural cycle reduces stress and enhances resilience. By planting veronica in early fall, you create a garden where its striking blooms capture attention and add visual interest.

26. Aster

© Herbidacious

Asters, known for their vibrant fall blooms, have traditionally been spring additions. New research advocates for early fall planting. This timing ensures better root development, leading to more prolific blooms. Gardeners might notice an extended flowering season and increased resilience against pests. The adjustment aligns with the plant’s natural cycle, supporting its ornamental appeal. By planting asters in early fall, you enhance your garden’s late-season display, creating a scene rich with color and vitality.

27. Coreopsis

© The Spruce

Coreopsis, with its sunny blooms, typically marks the beginning of summer in gardens. However, late summer planting is now advised for optimal growth. This timing supports robust root development, leading to healthier plants and longer bloom periods. Gardeners might appreciate the increased bloom density and improved pest resistance. Aligning with the plant’s natural cycle enhances resilience and decorative appeal. By adjusting the planting schedule, coreopsis can offer a garden filled with cheerful, long-lasting blooms.

28. Echinacea

© Longfield Gardens

Echinacea, loved for its medicinal properties and striking blooms, traditionally finds its place in spring gardens. However, late summer planting is now suggested for better results. This timing allows for optimal root establishment, promoting vigorous growth. Gardeners might notice an increase in bloom size and pollinator activity. The adjustment aligns with the plant’s natural cycle, supporting sustainable growth. By planting echinacea in late summer, you cultivate a garden where its beauty and benefits flourish, attracting wildlife and admiration alike.

29. Hollyhock

© Gardener’s Path

Hollyhocks, with their towering spires and old-fashioned charm, traditionally grace gardens in spring. However, early fall planting is now recommended for enhanced growth. This timing supports better root development, leading to stronger plants and more abundant blooms. Gardeners might notice an extended flowering period and increased resilience against pests. By aligning with the plant’s natural cycle, hollyhocks can thrive with less stress. Embrace this adjustment to enjoy a garden where hollyhocks add height and elegance, creating a stunning visual impact.

30. Delphinium

© Sarah Raven

Delphiniums, admired for their stately spikes and vibrant colors, are often springtime favorites. New insights suggest early fall planting for optimal growth. This timing ensures better root development, leading to stronger plants with more prolific blooms. Gardeners might notice an extended flowering period and increased resilience against pests. By aligning with the plant’s natural cycle, delphiniums can thrive with less stress. Embrace this adjustment to enjoy a garden where delphiniums stand tall, adding grandeur and color to your floral display.

31. Balloon Flower

© Gardener’s Path

The Balloon Flower, with its curious, inflated buds, captures the imagination. Its vibrant blue-violet blossoms open like stars, creating a stunning summer display. Historically, gardeners assumed early spring planting was key, but recent research suggests late summer is optimal. This timing ensures robust growth and prolonged bloom periods.

In Asian cultures, the Balloon Flower is a symbol of endless love and honesty. Its roots are often used in traditional medicine. The plant’s quirky nature and resilience make it a delightful addition to any garden. Experiment with different colored varieties for a unique visual treat.

Did you know? The Balloon Flower is hardy and can withstand tough conditions, making it a gardener’s reliable friend.