Garden Scheme
Plant library · Ornamental & Flowering Trees
Cornus kousa
Kousa dogwood is a perennial ornamental tree that brings pointed white bracts in late spring to early summer, followed by raspberry-like fruit. Reaching about 25 feet tall and wide, it is best treated as a small canopy tree rather than a border filler. Its pollinator-friendly flowers and deer resistance make it a useful focal point where the canopy can remain open and visible.
Space Kousa Dogwood 20 ft apart, measured center to center (6.1 m).
The mature spread is about 25 ft (7.6 m), so plants set at that distance grow together into a closed canopy.
Treat 20 ft as a planning baseline — cultivar and local growing conditions shift the final footprint.
Compare with the full ornamental and flowering tree spacing chart
Place Cornus kousa as a specimen in a lawn panel, at the broad edge of a woodland bed, or near a patio where its branching structure can be viewed from more than one side. Keep it out of narrow side yards and tight foundation strips; its mature canopy needs room away from roofs, walls, overhead lines, and the main route through the garden. A position with afternoon shade can moderate exposure while preserving a bright setting for bloom.[1][2]
Set multiple Kousa dogwoods 20 feet apart, center to center. Each tree can ultimately form a canopy about 25 feet across, so allow branches to overlap only where a connected grove is intentional. In mixed beds, reserve the central root-and-canopy zone for lower plantings that can be reached from the outside edge, rather than placing high-maintenance plants beneath the developing crown.
Use partial shade with moderate, regular moisture, especially while the tree is becoming established. Choose a well-drained site and avoid places that stay waterlogged. Humus-rich soil suits this tree well; a mulched planting area can keep the soil surface more even through summer without turning the trunk base into a crowded planting pocket.[1][2]
The white bracts arrive after many early spring-flowering trees have finished, making this a useful bridge into early summer. Fruit follows later in the season, while fall foliage and mature bark extend its visual role after bloom. Leave clear viewing space around the trunk and lower limbs so the tree still earns its place when flowers are gone.[1][2]
Plan for a long-lived woody framework, not a quick screen: young plants are more upright, while mature trees broaden into a rounded, spreading form. Keep paths and seating just beyond the future branch line so routine circulation does not become constrained as the canopy expands. In sunny sites, do not rely on dry soil; leaf scorch can occur when moisture is insufficient.[1][2]