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Tree · Fabaceae family

Silk tree

Albizia julibrissin

Full sun in a garden 13 ft 1½ in–16 ft 4⅞ in × 9 ft 10⅛ in–13 ft 1½ in Flowers July–August to −64 °F
Flower colors Click a color

In short a 10-second read

SunFull sun
in a garden after 10 years13 ft 1½ in–16 ft 4⅞ in
in the wild up to 49.2 ft
spacing 19 ft 8¼ in
FlowersJuly–August
PlantingApril–May
WinterMulch around the base

Where to plant and how much to water

Sun, soil and water.

It grows best in full sun, in dry to average soil.

Sun

Sun6 hours or more
Part shade3–6 hours
Shadeunder 3 h

Soil

acidic to neutral soil
acidicneutralalkaline
dry to averageloamysandygravelly

Watering

only in dry spellsless when it rains

Frost

−64 °F
mulch around the baseshelter from windleafless in winter

How much space it takes

Mature size.

The mature plant next to a person (69 in).

3 ft 3⅜ in6 ft 6¾ in9 ft 10⅛ in13 ft 1½ in16 ft 4⅞ in19 ft 8¼ in22 ft 11⅝ in26 ft 3 in29 ft 6⅜ in32.8 ft36.1 ft39.4 ft42.7 ft45.9 ft49.2 ft19 ft 8¼ in–49.2 ftspread 19 ft 8¼ in–29 ft 6⅜ in
19 ft 8¼ in–49.2 ft× spread 19 ft 8¼ in–29 ft 6⅜ in

Plant 19 ft 8¼ in apart.

Reaches maturity in about 10–20 years. The final size depends on the cultivar and the spot — we give the range from smallest to largest.

Calendar

Through the year.

Typical for a temperate climate (four seasons). The line shows the current month.

The year at a glance

Flowers: JanuaryFlowers: FebruaryFlowers: MarchFlowers: AprilFlowers: MayFlowers: JuneFlowers: JulyFlowers: AugustFlowers: SeptemberFlowers: OctoberFlowers: NovemberFlowers: DecemberPlanting: JanuaryPlanting: FebruaryPlanting: MarchPlanting: AprilPlanting: MayPlanting: JunePlanting: JulyPlanting: AugustPlanting: SeptemberPlanting: OctoberPlanting: NovemberPlanting: DecemberFeeding: JanuaryFeeding: FebruaryFeeding: MarchFeeding: AprilFeeding: MayFeeding: JuneFeeding: JulyFeeding: AugustFeeding: SeptemberFeeding: OctoberFeeding: NovemberFeeding: DecemberJanFebMarAprMayJunJulAugSepOctNovDec
FlowersPlantingFeeding
Now, in October: nothing to do — the next job is in April.
JanFebMarAprMayJunJulAugSepOctNovDec

Flowers

JanFebMarAprMayJunJulAugSepOctNovDec

July–August · pink

Planting

JanFebMarAprMayJunJulAugSepOctNovDec

container plant: April–May

Feeding

JanFebMarAprMayJunJulAugSepOctNovDec

May–June

Feeding

Nutrition.

Horn meal

up to 0.18 oz/sq ft 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

Mimosa (Fusarium) wilt

Medium riskdisease

What you will see

Leaves yellow and wilt, the tree dies; it spreads through root grafts to neighbouring trees. There is no cure.

The source says: it is among the susceptible woody ornamentals.

How to protect

  1. Prevention
    • Do not replant albizia in infected soil.
    • Resistant cultivars ('Charlotte', 'Tyron', 'Union') are propagated by root cuttings.
  2. By hand as soon as it is foundRemove the affected tree. There is no effective fungicide or cure.
Mimosa (Fusarium) wiltdiseaseMedium risk

What you will see

Leaves yellow and wilt, the tree dies; it spreads through root grafts to neighbouring trees. There is no cure.

The source says: it is among the susceptible woody ornamentals.

How to protect

  1. Prevention
    • Do not replant albizia in infected soil.
    • Resistant cultivars ('Charlotte', 'Tyron', 'Union') are propagated by root cuttings.
  2. By hand as soon as it is foundRemove the affected tree. There is no effective fungicide or cure.
Sources (3)

Frequently asked

Quick answers.

When does silk tree flower?

In July–August; the flowers are pink.

Does silk tree tolerate shade?

No, it needs full sun.

How much space does silk tree need?

At maturity 19 ft 8¼ in–29 ft 6⅜ in wide and 19 ft 8¼ in–49.2 ft tall; recommended spacing 19 ft 8¼ in.

Mimosa (Fusarium) wilt — what can you do?

Do not replant albizia in infected soil. Remove the affected tree. There is no effective fungicide or cure.

Sources (17) Checked 24 October 2026

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