Royal Cape® Plumbago

Light Needs

Full Sun

(At Least 6 Hours of Direct Sunlight)

Mature Height

5 Feet

Mature Spread

6-8 Feet

Growing Zones

9 to 11

Bring rich, true-blue color to hot, sunny spots with Royal Cape Plumbago. This compact, mounding selection covers itself in vivid cobalt clusters for months, drawing butterflies while looking fresh through heat and light drought. It’s flexible, too—grow as a shrub, let it spill from containers, or guide it onto a trellis.

Foliage stays lush and tidy as blooms cycle from spring well into fall. The form naturally drapes and cascades, softening edges along paths, walls, and patio pots without demanding constant care.

Royal Cape Plumbago Care

Give 6–8+ hours of direct sun daily for best flowering. Plant in well-drained soil amended with compost; a loamy or sandy mix is ideal with a pH around 6.0–7.5. Water new plants 1–2 times per week until established, then water when the top 1–2 inches of soil are dry; containers may need more frequent checks in summer.

Feed in spring with a balanced slow-release fertilizer, then supplement every 4–6 weeks during active bloom with a diluted liquid feed. Prune lightly after major flushes to shape and encourage rebloom; harder cuts are best in late winter. Hardy in zones 9–11; in colder regions, grow in containers and overwinter indoors in a bright, cool room.

Royal Cape Plumbago Spacing

For a single specimen, allow 4–6 feet of space to accommodate a mature spread. For a loose hedge or mass planting, set 3–4 feet on center. Keep at least 2 feet back from walls or paths to allow arching stems to drape.

In containers, use a 14–18 inch wide pot with drainage; size up to 20–24 inches as the plant fills in. Add a small trellis or obelisk if training upright, or let stems trail naturally from raised planters or hanging baskets.

Why Grow Royal Cape Plumbago?

• Nonstop, saturated blue flowers from spring through fall
• Easygoing performance in heat and light drought once established
• Versatile habit that mounds, trails, or climbs with support
• Beloved by butterflies; a lively color pop for patios and borders
• Generally unbothered by deer and many common pests

Ready for an effortless blue statement? Plant Royal Cape Plumbago where the sun lingers, and enjoy months of vivid color with minimal upkeep.