How-to Guide
Growing Flowering Dogwood (Cornus florida)
The short answer
Flowering dogwood (Cornus florida) is a small understory tree hardy in USDA zones 5 to 9 that matures around 15 to 30 feet tall. Plant it in full sun to partial shade in well-drained, organic-rich, slightly acidic to neutral soil, keeping it out of hot, dry, full-sun exposures and heavy clay.
Mulch 2 to 4 inches deep to keep roots cool and moist, and choose disease-resistant cultivars to reduce powdery mildew and spot anthracnose. Prune only when needed, in summer or winter.
Where it grows and where to plant it
Dogwood does best in a partially shaded spot and is not tolerant of full sun with hot, dry conditions, though trees in more sun tend to be shorter, denser, and produce more flowers. In warmer piedmont and coastal areas it benefits from afternoon shade.
- Hardiness: USDA zones 5 to 9
- Light: full sun to partial shade (afternoon shade in hot regions)
- Soil: well-drained, high in organic matter, slightly acidic to neutral pH
- Avoid heavy clay and high-pH soils, which cause chlorosis
Planting and ongoing care
- 1Site it โ Pick a partly shaded, well-drained location with room for a mature spread of 15 to 25 feet.
- 2Mulch โ Apply a 2- to 4-inch mulch layer beneath the canopy to keep roots cool and moist and to protect the trunk from mower and trimmer damage.
- 3Water โ Keep soil evenly moist, especially during hot, dry summers.
Pruning basics and timing
When trimming is needed, wait until summer to avoid removing next year's flower buds, or prune in winter to minimize sap bleeding from the cuts.
โ Planting a disease-resistant cultivar is the simplest way to reduce powdery mildew and spot anthracnose problems.
Sources
Reviewed 2026-07-18. We cite university Extension, government, and established horticultural sources โ and never invent pesticide rates or dangerous treatments.
- Clemson HGIC โ Dogwood โ Zones 5-9, part shade preference, well-drained acidic soil, mature size, prune summer or winter, disease-resistant cultivars.
- University of Maryland Extension โ Growing Flowering Dogwood Trees โ Site, mulch, and care guidance for flowering dogwood.