The Symmetrical Red Maple With Early, Glowing Orange-Red Fall

Autumn Radiance Red Maple (Acer rubrum 'Autumn Radiance') is a red maple selected for its dense, remarkably symmetrical oval-rounded crown and early, glowing orange-red fall color. It turns ahead of many red maples, holds a tidy uniform shape with little pruning, and brings the toughness of the species — tolerant of clay and wetter ground, and reliably cold-hardy. Whether you want a clean fall-color specimen in Maple Grove, a uniform boulevard tree in Burnsville, or a dependable shade tree in Edina, Autumn Radiance is a polished, low-fuss performer.

Autumn Radiance Red Maple Plant Details

Autumn Radiance Red Maple Uses in Minnesota Landscapes

Uniform Fall-Color Specimen

Autumn Radiance is prized for its symmetry — a dense, even oval-rounded crown that needs little corrective pruning and lights up early in glowing orange-red. It's a clean, dependable centerpiece for a front lawn.

Boulevard and Group Tree

Its consistent, predictable shape makes it well suited to matched boulevard rows and group plantings where uniformity matters. It tolerates urban and clay soils; keep it back from the heaviest direct road-salt spray.

Mid-Size Shade Tree

At a mature 40–45 feet, Autumn Radiance gives generous shade on a scale that suits most Twin Cities yards, and it's a strong, fast-establishing replacement for ash trees lost to emerald ash borer.

Wet and Low-Lying Sites

Like other red maples (also called swamp maple), Autumn Radiance tolerates the soggy, poorly drained corners of a property better than most shade trees — handy for low spots and rain-garden edges.

Best Time to Plant Autumn Radiance Red Maple in Minnesota

Plant in spring (late April–May, after the ground thaws) for a full growing season of root establishment, or in early fall (late August–early October) while the soil is still warm. Get it in the ground at least six weeks before the ground freezes — typically mid-November in the Twin Cities. Avoid mid-summer planting in heat and humidity, and never plant after mid-October or before spring thaw.

How to Plant Autumn Radiance Red Maple

1. Dig wide, not deep — 2–3x the root ball width but only as deep as the ball is tall, so the root flare sits at or slightly above grade.
2. Check drainage — Autumn Radiance tolerates wet soil, but if water pools and never drains, break through any clay hardpan or mound-plant slightly.
3. Backfill with the native soil mixed with 20–30% compost; don't create a pure-compost "container" the roots won't leave.
4. Spacing — give a single specimen 25–30 feet of clearance; space a row or allee 30–35 feet apart.
5. Build a 3–4 inch watering ring to direct water to the roots, then flatten it before winter so it doesn't trap ice.
6. Mulch with 2–3 inches of shredded bark or wood chips in a wide ring, kept 2 inches off the trunk. Never use gravel mulch in Minnesota — it doesn't insulate roots.

Watering Autumn Radiance Red Maple in Minnesota

First Year Watering Schedule

Weeks 1–2: water deeply and slowly every 1–2 days. Month 1–2: every 3–4 days. Month 3–6: every 5–7 days during active growth, easing off when rainfall is adequate (the Twin Cities average about 3 inches a month from June through August). Stop watering 2–3 weeks before the ground freezes — usually late October — so the tree doesn't push tender growth heading into winter.

After Year One

An established Autumn Radiance largely cares for itself, needing supplemental water only during extended droughts (two-plus weeks with no rain and temps above 80°F). Soak deeply to 8–12 inches every 7–14 days during dry spells and let natural rainfall do the rest.

Will Autumn Radiance Red Maple survive a Minnesota winter? Yes. It's a red maple rated to USDA zone 4 and is reliably hardy in Twin Cities winters. Wrap the young trunk the first winter to prevent sunscald and buck rub.

How fast does it grow here? Moderately fast — roughly 1.5–2.5 feet per year in good Minnesota soil with adequate moisture.

What makes it different from other red maples? Autumn Radiance was selected for an unusually dense, symmetrical crown and early fall color, so it holds a clean, uniform shape with minimal pruning and turns ahead of many other red maples.

Is it native to Minnesota? Red maple (Acer rubrum) is native to eastern and southeastern Minnesota and across eastern North America. 'Autumn Radiance' is a selected cultivar bred for form and color.

Does it handle clay and wet soil? Yes — better than most shade trees. Its wild ancestor grows in swampy bottomlands, so it tolerates heavy clay-loam and wet ground; in very alkaline soil a slightly acidic amendment helps prevent leaf yellowing.

You May Also Like

• Brandywine Red Maple — a seedless red maple with long-lasting red-purple fall color.
• Scarlet Jewell Red Maple — a tidy red maple with early, brilliant scarlet fall color.
• Red Sunset Red Maple — a larger, fast-growing red maple with brilliant orange-red fall color.
• Northwood Red Maple — a University of Minnesota red maple bred for extreme cold-hardiness.
• Autumn Blaze Maple — the popular fast-growing Freeman maple with brilliant orange-red fall color.

How Many Autumn Radiance Red Maple Do I Need?

One tree with 25–30 feet of clearance shades a typical Twin Cities front or back yard. For a matched boulevard row or allee — where this cultivar's uniform crown really shines — space trees 30–35 feet on center: a 60-foot run takes 3 trees, a 120-foot run takes 4–5. A trio spaced 30 feet apart on acreage gives a synchronized block of early orange-red color.

Autumn Radiance Red Maple Season-by-Season in Minnesota

• Spring: A red haze of early maple flowers on bare branches, then a dense flush of clean green foliage.
• Summer: A symmetrical, oval-rounded crown of deep green — tidy enough to need almost no corrective pruning.
• Fall: One of the first shade trees to turn — glowing orange-red that arrives early and reads evenly across the whole canopy.
• Winter: A balanced, evenly spaced branch structure that looks composed even bare; wrap the young trunk against sunscald.

At a Glance

✔ Deer-Resistant   ✔ Rain-Garden / Wet-Soil   ✔ Drought-Tolerant

Plant It With

• Brandywine Red Maple — a seedless red maple whose red-purple fall color extends the season after Autumn Radiance peaks.
• Scarlet Jewell Red Maple — another early-coloring red maple for a synchronized scarlet-and-orange show.
• Red Sunset Red Maple — a larger red maple to anchor the back of the planting.
• Autumn Blaze Maple — a faster-growing Freeman maple that blends seamlessly in groups.

Is Autumn Radiance Red Maple Right for Your Yard?

Autumn Radiance thrives in full sun on moist, even wet, Twin Cities soils and suits homeowners who want a polished, symmetrical 40–45 foot shade tree with early fall color and minimal pruning. It's not a fit for strongly alkaline soils (leaves can yellow) or spots in the direct line of heavy road-salt spray — set it back from the curb on salted streets.