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:
Hand-picked at our greenhouse
Shipped to your door
Arrives as young plant
Soil: Thrives in average to rich well-draining soils. Can handle poor soils and dry conditions once established.
Light: Full sun (6+ hours direct sunlight a day)
Water: Average. Water frequently until established. Watering may be reduced after establishment.
Spacing: 18 to 24 inches
Fertilizing: Seldom needed. Apply a granular garden fertilizer in early spring if desired. Another round of fertilizer in summer can help carry the blooms into fall.
Maintenance & Pruning: None required; you may shear back old blooms if you wish, but this is not necessary for continuous bloom.