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A size chart showing 4 different options for Perennial Plants: 4.5" Eco+ Elite (5-8" plant height, 4.5" pot width, 5" pot height); 0.65 Gallon (6-14" plant height, 6.5" pot width, 6.5" pot height); 1 Gallon (6-24" plant height, 6.5" pot width, 7.13" pot height); 2 Gallon (18-28" plant height, 8.88" pot width, 9.38" pot height).
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A size chart showing 4 different options for Perennial Plants: 4.5" Eco+ Elite (5-8" plant height, 4.5" pot width, 5" pot height); 0.65 Gallon (6-14" plant height, 6.5" pot width, 6.5" pot height); 1 Gallon (6-24" plant height, 6.5" pot width, 7.13" pot height); 2 Gallon (18-28" plant height, 8.88" pot width, 9.38" pot height).
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'Firefly Diamond' Yarrow (Achillea)

Please select Size and Ship Week to view correct pricing and availability.

You can only choose one Ship Week per order for all plants in order to check out.
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Regular price $3799
Regular price $3799 Sale price $3799
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How Does Proven Winners® Measure Plant Sizes?

We list our plants by container size, which reflects the amount of soil and root growth each plant has when it ships. Actual plant height and width vary by variety and season, and many plants grow quickly as the weather warms.

To help you understand what to expect, refer to our size guide below. You can also find each plant’s approximate arrival size and mature size on its product page.

How Does Proven Winners® Measure Plant Sizes?

We list our plants by container size, which reflects the soil volume and root growth each plant has at shipping. Actual height and width vary by variety and season, and many plants grow quickly as temperatures warm.
 
For a quick reference, check the size guide below—you’ll also find each plant’s estimated arrival size and mature size on its product page.

How Does Proven Winners® Measure Plant Sizes?

We list our plants by container size, which reflects the soil volume and root growth each plant has at shipping. Actual height and width vary by variety and season, and many plants grow quickly as temperatures warm.
 
For a quick reference, check the size guide below—you’ll also find each plant’s estimated arrival size and mature size on its product page.

Plant Height By Container Size

This chart highlights the typical heights for each size category while also showing how container sizes compare, giving you a clear, straightforward way to understand plant size at arrival and choose the best fit for your gardening needs.

This chart shows typical plant heights and compares container sizes, helping you quickly understand arrival size and choose the best fit.

Plant height size guide chart consisting of eco+ grande, eco+ elite, Combination, Royale, 0.65 gallon, 1 gallon, 2 gallon

Soil Volume By Container Size

This chart shows the typical soil volume for each container size, listed in both imperial and metrics units for easy comparison.

Soil volume size guide chart consisting of eco+ grande, eco+ elite, Combination, Royale, 0.65 gallon, 1 gallon, 2 gallon
Supertunia Vista® Paradise Petunia and ColorBlaze® Strawberry Drop Coleus planted together in a garden

Proven
Winners®
Annuals

Perovskia Denim 'n Lace & Tecoma Chicklet Orange planted in the ground

Proven
Winners® Perennials

Up close photo of Invincibelle smooth hydrangea

Proven
Winners®
Shrubs

Proven winners supplies on a table consisting of proven winners water wise, fertilizer, and tubing

Proven
Winners®
Supplies

Proven Winners® Annuals

Proven Winners® Perennials

Proven Winners®
Shrubs

Proven Winners®
Supplies

Orders placed before 11am ET will ship same day. Orders placed after 11am ET will ship next day. Annual orders ship Monday – Wednesday. Perennial, Shrub, and Hardgood orders ship Monday – Friday.
  • Free Shipping $175+
  • Happy Gardener Guarantee
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‘Firefly Diamond’ Yarrow is a beautiful and versatile perennial that enchants with its delicate ivory-white flowers, blooming continuously throughout the summer. Its dark green foliage provides a stunning backdrop, creating a striking contrast to the blooms. Known for being easy to grow, this hardy plant thrives with minimal effort, while its fragrant flowers add a lovely scent to any garden. Perfect for borders, landscapes, or as a vibrant addition to cut and dried flower arrangements, ‘Firefly Diamond’ is an excellent choice for both seasoned gardeners and beginners alike.

  • 24-28 inches tall and 32-40 inches wide at maturity
  • Hardy in zones 3-8, be sure to check your USDA zone to ensure success
  • Plant in full sun (6+ hours daily)
  • Space plants 32-40 inches apart for best results
  • Produces fragrant ivory white flowers throughout summer
  • Maintains dark green foliage spring through frost
  • Great for borders, cut flowers, dried flowers, landscapes, mass plantings
  • Attracts bees and butterflies while resisting deer and rabbits
  • Native to North America, drought and salt tolerant

Care: Easy to grow in full sun and well-drained soil. Avoid planting in rich soil. Once flowers have faded, cut the plant back by half. Fertilize with Proven Winners Continuous Release Plant Food in spring.

Shipping Info:

  • Enjoy free shipping on orders over $175
  • Size at shipping varies by season, plant, and trimming schedules
    • Quart perennials are 5-8 in. at the time of shipment
    • 0.65 Gallon perennials are 6-14 in. at the time of shipment
    • 1 Gallon perennials are 6-24 in. at the time of shipment
  • Perennials shipped Nov-Apr will arrive dormant; perennials shipped Apr-Oct will arrive green or in bloom

 

Read our guide to get started with planning a garden
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