Bigleaf maple
Acer macrophyllum · Sapindaceae
The gardener's calendar
In autumn, ease off feeding and take the chance to clean up around bigleaf maple and prepare for winter.
ID card
- Scientific name
- Acer macrophyllum
- Foliage
- Deciduous
- Flowering
- Spring (April-May)
- Adult size
- 20 to 30 m in height
- Growth
- Moderate to fast
- Hardiness
- -15 to -20 °C
- Origin
- West coast of North America (British Columbia to California)
- Soil type
- Rich, well-drained, slightly acidic to neutral
Care
Watering
The bigleaf maple appreciates moist but not waterlogged soil. Water regularly during the first year after planting to promote root establishment. Once established, it tolerates moderate drought but prefers consistent moisture during the active growing period.
Exposure
This maple thrives in full sun or partial shade. In warm regions, afternoon shade will protect it from water stress. It dislikes overly windy exposures that can dry out its impressive foliage.
Pruning and structure
Prune lightly after leaf drop or in late winter to remove deadwood or poorly oriented branches. Avoid severe pruning as it weakens the tree. Favor gentle pruning to preserve its beautiful natural architecture.
Soil and potting mix
Prefer deep, organic-rich and well-drained soil. Adding compost at planting time improves establishment. This maple tolerates slight acidity but remains adaptable to neutral pH levels.
Fertilizer
An annual application of compost or organic matter at the base is more than sufficient. Avoid concentrated mineral fertilizers that can burn the roots. This tree is undemanding and thrives naturally in rich soil.
Pests and diseases
The bigleaf maple is generally robust. Watch for possible scale insects or aphids in spring. Good drainage prevents root rot; if soil is too wet, improve aeration.
Did you know?
This North American maple is one of the most majestic species on the Pacific coast: its leaves, the largest of all maples, can reach 25 cm in diameter. Indigenous peoples traditionally used its soft wood for carving, and its sap, though less sweet than that of sugar maple, was also processed for syrup.
Where to buy it
Best planted in autumn so the roots settle in before summer, or in early spring once the frost has passed. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, October, November.
Add this plant to my garden →Plants from the same family
- Japanese mapleAcer palmatum
- Sycamore mapleAcer pseudoplatanus
- Norway mapleAcer platanoides
- Field mapleAcer campestre
- Marronnier dindeAesculus hippocastanum
- Box elderAcer negundo
Tips generated and checked by Viridia — adapt them to your local climate.