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
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Arrives as young plant
DescriptionHardy plumbago (Ceratostigma plumbaginoides) brings a splash of color to your garden in the late summer through fall with creatively colored flowers and foliage. Striking blue flowers bloom in the late summer and persist as foliage changes from green to a rich maroon in the fall. These colors will quickly fill your garden as it spreads vigorously in optimum conditions.
Hardy plumbago is a creeping, semi-woody perennial. This tough-as-nails, heat-tolerant perennial will thrive on dry, sunny slopes and makes a terrific foreground planting to flowering shrubs. Plant it in your difficult to grow spaces and watch it thrive!DetailsBotanical name: Ceratostigma plumbaginoides Common name: Plumbago, hardy plumbago, leadwort Zone: 5 - 9 Sun exposure: Sun (> 6 hours sun) to part-sun (4-6 hours sun) Height x width: 9-12" X 12-18" Flower color: Gentian blue Foliage color: Green Season of interest: Late summer - early fall Uses: Accent, alpine and rock gardens, container gardening, edging, erosion control or embankment, ground cover, massing, slopes How To GrowSoil: Average, medium, or well-drained soils. Tolerant of most soils, except wet, poorly-drained soils. Light: Sun (> 6 hours sun) to part-sun (4-6 hours sun) Water: Average needs. Water during hot, dry periods. Spacing: 1 to 1.5 feet Fertilizing: Fertilizing is generally unnecessary but can be applied in early spring if desired. Winterizing: It would benefit from an extra layer of mulch for protection, especially in colder zones. Maintenance & pruning: Spreads by rhizomes and can be somewhat aggressive in optimum growing conditions. Cut back to the ground in autumn. It can divide in late autumn or after the last spring frost.