ACER macrophyllum

Commonly known as Big leaf maple, Oregon maple

Large dark green deeply lobed leaves which turn a bright orange in autumn. Fragrant yellow flowers in clusters followed by bristly fruit
Further Reading....
  • Deciduous
    Broadly ovate, deeply 5-lobed, glossy leaves 20-30cm (8-12in) long
  • Yellow
    Yellow-green
  • Height
    20m (65ft)
  • Spread
    20m (65ft)
  • Tree
    Vigorous. Produces large, bristly, winged fruit
  • Very hardy
    Hardy in the severest continental climates including exposed upland locations in the UK. Plant can withstand temperatures < -20 (-4°F)
  • Full sun
  • Partial shade

ACER macrophyllum

 

 

  • Additional Features
    Good to know
    The largest leaves of any maple
    Pests & Diseases
    Aphids, mites (causing galls), caterpillars, Verticillium wilt, leaf scorch, honey fungus
    Place of origin
    Western North America
  • Flower Shape
    Racemes
    Pendent racemes 10-15cm (4-6in) long
  • Garden Location/Conditions
    Woodland garden
  • Hardiness
    Fully hardy
  • Leaf margin
    Lobed
    		(see photos above)
  • Leaf shape
    Ovate
    		(see photos above)
  • Pruning group
    Pruning group 1
    Suitable for: Deciduous and evergreen trees, and some deciduous shrubs.
    Pruning: Minimal pruning required. Prune wayward or crossing branches to maintain a healthy framework.
    When: When dormant in the late winter/early spring. Some in the summer/autumn to prevent bleeding of sap.

    RHS group 1
  • Seasonal Interest
    Autumn
    Spring
  • Soil Conditions
    Fertile moist well-drained soil
  • Tree Shape
    Rounded to broadly spreading
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Acers - Care Guide
20m (65ft)
 tree - guide for size not form Average Person
  20m (65ft)
  

Useful extras...

Fertilisers & Feeds - Vitax
Q4 Pelleted Fertiliser
A useful fertiliser suitable for use on a wide variety of plants. Q4 provides all the nutrients and trace elements essential for vigorous growth, abundant flowering and ripening of fruit.
3 options from £6.00

Fertilisers & Feeds - Empathy
Afterplant - Grow Your Own
AFTER PLANT GROW YOUR OWN seaweed is ready to use liquid concentrate that was specially formulated be used on all edible plants.
Only £8.00

Fertilisers & Feeds - Empathy
Afterplant - Tomatoes
AFTER PLANT TOMATO FEED Liquid Concentrate with Bio stimulant is a high potash liquid concentrate containing seaweed extract, plant derived amino acids and other nutrients specifically formulated to benefit tomatoes and greenhouse plants.
Only £8.00

Fertilisers & Feeds - Empathy
Rootgrow mycorrhizal fungi
Recommended by the RHS. Contains Rootgrow™ mycorrhizal fungi. Suitable for all trees and shrubs (except rhododendrons, azaleas, heathers, cranberries and blueberries)
3 options from £3.00

Fertilisers & Feeds - Empathy
Rootgrow Ericoid mycorrhizal fungi
This specially adapted Rootgrow™ mycorrhizal fungi will boost the growth of acid-loving plants like rhododendrons, azaleas, heathers and blueberries. It contains ericoid and arbuscular mycorrhizal fungi, which are found in poor acidic soils where ericaceous plants naturally grow.
Only £7.50

Fertilisers & Feeds - Empathy
All-purpose Seaweed Stimulant
All-purpose organic concentrated seaweed feed that is a ready to use, derived from sustainable harvested kelp, that can be used on all outdoor and indoor plants, except acid loving plants. Perfect used in conjunction with Rootgrow™.
Only £7.50

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