Plant spacing is based on the ultimate width of the plants. This figure is normally given as a range; for example, 3-5’. If you live in a cold climate and/or want plants to fill in more quickly, plan to space at the shorter end of the range. If you live in a warm climate, are on a limited budget, or are willing to wait longer for plants to touch, use the higher end of the range. Using the larger number is recommended when calculating distance from a building or structure. There’s really no such thing as "maximum spacing": if you don’t want your plants to touch, you can space them as far apart as you’d like. All plant spacing is calculated on center, or in other words, the centers of the plants are spaced one half of their eventual width apart:
Unless you are planting in a straight line, as you might for hedges or edging, space your plants in a staggered or zig-zag pattern for a more interesting and naturalistic look:
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DescriptionEverything you love about yarrow, and nothing you don't! Yarrow (Achillea sp.) has long been one of the most popular perennials for sun, thanks to its easy-going nature and long bloom time. It wasn't without a few bad qualities, though - until 'Firefly Diamond' came along! Developed and selected by Proven Winners Perennials for it sturdiness: no worries about it flopping, splitting apart, or splaying open. Enjoy a nice display of crisp white flowers on long, tall, slender stems all summer long.
Success with Firefly Diamond yarrow is simple. Just plant it in a sunny, dry spot and enjoy! It is unbothered by deer or rabbits and shrugs off hot, dry conditions. Flowers are nice in arrangements, both fresh and dried. Soft ferny foliage brings a unique texture to the garden.DetailsBotanical Name: Achillea 'Firefly Diamond' Patent: PP32,986
Common Name: Yarrow
Zone: 3 - 8
Sun Exposure: Full sun (>6 hours/day)
Height x Width: 24-28" x 32-40"
Flower Color: White
Foliage Color: Green
Season of Interest: Summer Bloom time: Summer Features: Rabbit resistant, proven winners, low flammability, heat tolerant, deer resistant, cold tolerant, best for beginners Uses: Edging, Flower gardens, Wildlife gardens, Native plant gardensHow To GrowSoil: Thrives in any well-drained, even dry, soil.
Light: Full sun (6+ hrs/day) Water: Average to low soil moisture. Avoid moist or wet soils, which can lead to weak growth and rot.
Spacing: 2-3 feet
Fertilizing: Not required or recommended. Overly fertile soils or conditions encourage floppy growth.
Winterizing: No special winter requirements; dry conditions in winter are preferred.
Maintenance & Pruning: Plant can be cut back after its first early summer bloom for a flush of fresh growth as with other yarrow. However, this is not strictly necessary, as this improved selection continues to bloom without the customary trim.