Tree · Sapindaceae family

Red maple

Acer rubrum

Full sun to part shade in a garden 5–8 m × 3–5 m Flowers March to −40 °C

Flower colours Click a colour

In short a 10-second read

SunFull sun to part shade

in a garden after 10 years5–8 m
in the wild up to 20 m
spacing 8 m

FlowersMarch

PlantingMarch–April, October–November

WinterNo winter protection

Where to plant and how much to water

Sun, soil and water.

It grows best in full sun to part shade, in average to moist soil.

Sun

Sun6 hours or more

Part shade3–6 hours

Shadeunder 3 h

Soil

acidic to neutral soil

acidicneutralalkaline

average to moistloamyhumus-richsandy

Watering

keep the soil evenly moistless when it rains

Frost

−40 °C

no winter protectionleafless in winter

How much space it takes

Mature size.

The mature plant next to a person (175 cm).

12–20 m× spread 8–12 m

Plant 8 m apart.

Reaches maturity in about 20–50 years. The final size depends on the cultivar and the spot — we give the range from smallest to largest.

Calendar

Through the year.

Months for Central Europe. The line shows the current month.

The year at a glance

FlowersPlantingFeeding

Now, in October: a good time for planting (container plant).

JanFebMarAprMayJunJulAugSepOctNovDec

Flowers

JanFebMarAprMayJunJulAugSepOctNovDec

March · red

Planting

JanFebMarAprMayJunJulAugSepOctNovDec

container plant: March–April, October–November

Feeding

JanFebMarAprMayJunJulAugSepOctNovDec

May–June

What to plant now (October) full list in October (244) →

Feeding

Nutrition.

Horn meal

up to 55 g/m² a year, if the soil needs it · May–June

JanFebMarAprMayJunJulAugSepOctNovDec

Pests and diseases

Common problems and what to do.

The most common problems in Central Europe. Protection is listed from the gentlest option.

High riskMedium riskLow riskRisk for this plant according to the source · no label = no documented level

Verticillium wilt

Verticillium

Medium riskdiseasesource covers the whole genus

What you will see

Leaves yellow and wilt, often on one side of the tree only. When a branch is cut, the wood is green to black or streaked. The tree usually cannot be cured.

The source says: it is among the plants affected most commonly.

When to look

Throughout the year; symptoms can develop rapidly in hot weather

How to protect

Prevention
- Do not plant susceptible species (maple, catalpa, redbud) where a tree has been killed by this disease.
- Do not make mulch from the wood of affected trees.
- Do not overdo feeding and pruning.
By hand spring – summerWith mild symptoms, cut out affected branches, disinfect tools, water the tree and keep it vigorous. There is no reliable chemical cure.

Verticillium wiltdisease · throughout the year; symptoms can develop rapidly in hot weatherMedium risk

What you will see

Leaves yellow and wilt, often on one side of the tree only. When a branch is cut, the wood is green to black or streaked. The tree usually cannot be cured.

The source says: it is among the plants affected most commonly.

When to look

Throughout the year; symptoms can develop rapidly in hot weather

How to protect

Prevention
- Do not plant susceptible species (maple, catalpa, redbud) where a tree has been killed by this disease.
- Do not make mulch from the wood of affected trees.
- Do not overdo feeding and pruning.
By hand spring – summerWith mild symptoms, cut out affected branches, disinfect tools, water the tree and keep it vigorous. There is no reliable chemical cure.

Quick answers.

When does red maple flower?

In March; the flowers are red.

Does red maple tolerate shade?

It tolerates part shade (3–6 hours of sun), but not full shade.

How much space does red maple need?

At maturity 8–12 m wide and 12–20 m tall; recommended spacing 8 m.

Verticillium wilt — what can you do?

Do not plant susceptible species (maple, catalpa, redbud) where a tree has been killed by this disease. With mild symptoms, cut out affected branches, disinfect tools, water the tree and keep it vigorous. There is no reliable chemical cure.

Sources (18) Checked 24 October 2026