How to Grow Red Maple 'Red Sunset'

Red Maple 'Red Sunset'

Acer rubrum 'Red Sunset'

tree

Red Maple 'Red Sunset' is a deciduous shade tree prized for its vibrant red foliage that emerges early in spring and intensifies to brilliant crimson in fall. This cultivar is a superior selection of the native Red Maple, offering more reliable and earlier red coloration than the species. It grows as a medium to large tree, reaching 45-50 feet tall with a dense, pyramidal to oval crown.

Growing Conditions

☀️

Sun: Full sun to partial shade; 6+ hours of direct sunlight for best fall color

💧

Water: Prefers consistently moist soil; water deeply and regularly, especially during establishment (first 2 years) and drought periods. More water-tolerant than many maples and can handle wet sites.

📏

Spacing: 240 inches

📅

Days to maturity: Not applicable for ornamental tree; reaches mature size in 20-30 years

🌱

Planting depth: Plant with root ball at or slightly above ground level; ensure flare is visible

Soil

Type: Moist, well-draining loamy soil; tolerates acidic to slightly alkaline conditions

pH: 5.0-7.0

Amendments:

Peat moss or compost for moisture retention Mulch layer (2-4 inches) to maintain soil temperature and moisture Avoid heavy clay compaction

Growing Zones

Find your zone →

Thrives in zones 3-9, with best performance in zones 4-8

3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a

Growth Stages

Establishment

First 12 months

Newly planted tree with developing root system; foliage may be stress-induced

Water deeply 2-3 times weekly for first year; avoid fertilizing; prune only dead or damaged branches; apply mulch to protect roots

Early Growth

Years 2-5

Young tree develops structural branches and increases in height; spring foliage appears reddish

Continue consistent watering; stake if in windy location; prune to maintain central leader and remove crossing branches; apply balanced fertilizer sparingly if needed

Structural Development

Years 5-15

Tree develops distinctive pyramidal to oval form; canopy fills in with dense branching

Reduce watering frequency as roots establish; thin interior branches for air circulation; prune in late winter or early spring while dormant; monitor for pest/disease issues

Mature Growth

Years 15+

Tree reaches full size (45-50 feet); displays spectacular red spring growth and brilliant crimson fall foliage; canopy fully developed

Water during prolonged drought; light annual pruning to remove dead or diseased wood; maintain mulch layer; avoid deep rooting into clay at base; minimal fertilization needed

Companion Planting

Plan your garden →

Plant with:

Understory shade plants: Hostas, Hellebores, Epimedium Dogwood (Cornus) Redbud (Cercis) Serviceberry (Amelanchier) Shade-tolerant shrubs: Viburnum, Boxwood Ferns and groundcovers in shaded areas

Avoid planting near:

Black Walnut (Juglans nigra) - releases juglone toxin Shallow-rooted plants competing for moisture in dry sites Air conditioning units or heat sources Salt-treated roads or areas with road salt spray Structures with shallow foundations (roots eventually spread wide)

Common Pests

Monitor for skeletonized leaves; use horticultural oil or insecticidal soap in early summer; encourage natural predators
Prune heavily infested branches; apply dormant oil in late winter; monitor for sooty mold indicating heavy infestation
Increase humidity through regular watering; spray foliage with water to dislodge; use miticide if severe; typically worse in dry conditions
Blast with water spray; use insecticidal soap for heavy infestations; natural predators usually keep populations in check
Maintain tree vigor through proper watering; prune dead branches; avoid root damage; no cure; remove severely affected trees

Uses

🌿

Shade and ornamental canopy

Landscape

Red Maple 'Red Sunset' provides dense summer shade for lawns and structures while offering stunning visual interest through early spring red foliage and brilliant crimson fall color that lasts several weeks. [source]

🦋

Wildlife habitat and food source

Wildlife

The tree produces abundant seeds that feed birds and small mammals; spring flowers provide early nectar for pollinators; dense canopy offers shelter for nesting birds and wildlife. [source]

🏠

Specimen and street tree

Household

Widely used in urban and suburban landscaping as a street tree, park specimen, and foundation planting; improved selection offers more reliable red coloration than native species. [source]

🎨

Fall foliage appreciation and photography

Craft

Red Maple 'Red Sunset' is renowned for predictable, vibrant crimson fall color appearing 2-3 weeks earlier than other maples, making it a favorite for ornamental landscape design and autumn photography. [source]

Harvest Tips

Not applicable for ornamental tree. For seeds, collect winged samaras (helicopters) in fall after they turn brown but before dropping; dry and store in cool location for propagation if desired.

Fun Facts

🌱 'Red Sunset' was selected and named by the Saratoga Horticultural Foundation for its reliable early spring red coloration and superior fall color compared to seedling Red Maples.
🌱 The common name 'Red Maple' refers to multiple red features: reddish twigs, red flowers in spring, red seeds, and red fall foliage—making it one of the most colorful native trees in eastern North America.
🌱 Red Maple 'Red Sunset' is more tolerant of wet and poorly drained soils than most maple species, making it valuable for landscaping in areas with seasonal flooding or high water tables.

Want personalized planting timelines?

Get started free