Folio № 23 of 36 · in the garden since 2022

Bigleaf Maple

Acer macrophyllum

DeciduousBroadleafFull sun

Large-leafed native maple, slower to ramify; best in larger sizes or naturalistic styles.

Zone 8b notesProtect roots if temps < 20 F

Visit the Bigleaf Maple bench — 1 tree →

Bigleaf Maple botanical plate
Acer macrophyllumPlate XXIII · Mossy Spot Herbarium

The year, as this species lives it

Thirteen phases. Touch any arc — the wheel remembers what each season asks.

Late DormancyEarly SpringMid SpringLate SpringEarly SummerMid SummerLate SummerEarly FallMid FallLate FallEarly WinterMid WinterLate Winterthe yearOF A BIGLEAF MAPLE

Mid Summer · Jul 1 – Aug 10 · happening now

  • WateringMonitor daily; ensure no drought stress.
  • FertilizationTaper nitrogen; hold feed during hottest weeks.
  • PruningPinch back soft spring growth; wait until fall for structure.
  • Pests DiseaseCheck for powdery mildew in humid weather.
  • Summer ProtectionEnsure root ball doesn’t overheat—shade or pot insulation.

click another arc to travel the year →

All thirteen phases, side by side →

The care sheet

The constants — what stays true in every season.

Placement

Full sun

Hardy species; prefers consistent sunlight.

Watering

Moderate

Avoid waterlogging; prefers well-drained soil.

Feeding

Balanced

Feed monthly in growing season; reduce in late summer.

Pruning

Structural in early spring, maintenance through summer

Hard prune before bud break to shape.

Wiring

Spring or Autumn

Branches are brittle; wire when flexible.

Repotting

Every 2-3 years

Use coarse mix; avoid overpotting.

Propagation

Cuttings or seed

Seedling development takes time but worthwhile.

Winter

Fully hardy but mulch roots in extreme cold.

Summer

Water deeply and regularly in hot weather.

On the bench · 1

Every Bigleaf Maple in the garden, oldest hands first.

Bigleaf Maple 2

Bigleaf Maple 2

№ 041since ’22

← Previous folioLilac Sensationfolio 23 of 36 · back to the libraryNext folio →Japanese Maple 'Bloodgood'

Paths onward

CollectionThe Bigleaf Maple bench1 tree, the oldest here since 2022.The yearFull seasonal calendarBigleaf Maple’s thirteen phases, side by side.TodayThe AlmanacMid Summer is underway — see what the garden asks now.
Mossy Spot · PNW · Zone 8bgrow slowly
Mossy Spot❧The Species Library❧Bigleaf Maple
73° Clear · Mid Summer
Sign in