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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DescriptionAdd a touch of romance to your landscape with Wedding Cake® spirea (Spiraea nipponica). Lacy white blooms cover this spirea all summer long, beckoning pollinators. Its rounded habit looks graceful in the landscape without any pruning needed. This shrub is a stunning yet easy-care addition to your landscape, making a classic specimen or an elegant backdrop to your perennial garden.DetailsBotanical name: Spiraea nipponica 'SMNSNFD' Patent #: USPP 28,096 Common name: Spirea Zone: 4- 8 Sun exposure: Full (6+ hours sun) to part sun (4-6 hours sun) Height x width: 3-3.5' tall and wide Flower color: White Foliage color: Dark green Season of interest: Spring-Summer Bloom time: Early summer, late spring Features: Rabbit resistant, proven winners, low flammability, drought tolerant, best for beginners Uses: Specimen, hedge, perennial gardens, landscaping How To GrowSoil: Not finicky about soil, as long as it is well drained. Tolerates dry conditions once established. Light: Full sun (6+ hrs/day) to part-sun (4-6 hrs of sun/day). Water: Average. Space: 2-3' apart. Fertilizing: Little needed. Apply a granular rose fertilizer in early spring if desired. Winterizing: A good 2-3" layer of mulch is recommended; nothing else is needed. Maintenance & Pruning: Double Play spirea naturally grow with a neat, tidy habit and need little pruning. If desired, trim or prune after spring bloom; this will encourage a second flush of colorful new growth as well as remove the first round of spent flowers for a neater look.