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Tree · Fabaceae family

Voss's laburnum

Laburnum × watereri

Full sun to part shade in a garden 2.5–4 m × 1.5–3 m Flowers May to −29 °C
Flower colours Click a colour

In short a 10-second read

SunFull sun to part shade
in a garden after 10 years2.5–4 m
in the wild up to 8 m
spacing 3 m
FlowersMay
PlantingMarch–April, October–November
WinterNo winter protection
Toxicity:highly poisonous to people
Highly poisonous to people — do not plant it where children play.

Where to plant and how much to water

Sun, soil and water.

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

Sun

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

Soil

tolerates any pH
acidicneutralalkaline
averageloamysandygravelly

Watering

do not waterlogless when it rains

Frost

−29 °C
no winter protectionleafless in winter

How much space it takes

Mature size.

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

1 m2 m3 m4 m5 m6 m7 m8 m5–8 mspread 3–5 m
5–8 m× spread 3–5 m

Plant 3 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

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: a good time for planting (container plant, bare-root, root-balled).
JanFebMarAprMayJunJulAugSepOctNovDec

Flowers

JanFebMarAprMayJunJulAugSepOctNovDec

May · yellow

Planting

JanFebMarAprMayJunJulAugSepOctNovDec

container plant: March–April, October–November; bare-root: March–April, October–November; root-balled: March–April, October–November

Feeding

JanFebMarAprMayJunJulAugSepOctNovDec

May–June

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
Honey fungus

Honey fungus

Armillaria
High riskdisease
More about this problem

What you will see

Dieback of branches or the whole plant, smaller pale leaves. Under the bark at the root collar, white spongy tissue with a mushroom smell. Honey-coloured clusters of toadstools in autumn.

The source says: it is among the plants particularly susceptible to honey fungus.

When to look

Summer – autumn

How to protect

  1. Prevention
    • Choose the least susceptible species; risky ground after old trees have been felled.
  2. By hand all yearOnce confirmed, dig up and destroy affected roots and stumps; sink a 45 cm deep plastic barrier into the soil. There is no chemical control for gardeners.
Honey fungusdisease · summer – autumnHigh risk

What you will see

Dieback of branches or the whole plant, smaller pale leaves. Under the bark at the root collar, white spongy tissue with a mushroom smell. Honey-coloured clusters of toadstools in autumn.

The source says: it is among the plants particularly susceptible to honey fungus.

When to look

Summer – autumn

How to protect

  1. Prevention
    • Choose the least susceptible species; risky ground after old trees have been felled.
  2. By hand all yearOnce confirmed, dig up and destroy affected roots and stumps; sink a 45 cm deep plastic barrier into the soil. There is no chemical control for gardeners.
More about this problem

What you will see

Silvery leaves, brown dieback of branches; it occurs on laburnum and hawthorn.

The source says: it is among the susceptible plants where treating pruning wounds may be worthwhile.

How to protect

  1. Prevention
    • Prune only in dry weather.
  2. By hand summerCut affected branches back to healthy wood.
Silver leafdiseaseMedium risk

What you will see

Silvery leaves, brown dieback of branches; it occurs on laburnum and hawthorn.

The source says: it is among the susceptible plants where treating pruning wounds may be worthwhile.

How to protect

  1. Prevention
    • Prune only in dry weather.
  2. By hand summerCut affected branches back to healthy wood.
More about this problem

What you will see

Aphids on shoots.

How to protect

  1. Prevention
    • Encourage natural predators.
  2. By hand spring – summerRinse off with water or wipe off.
Aphidspest

What you will see

Aphids on shoots.

How to protect

  1. Prevention
    • Encourage natural predators.
  2. By hand spring – summerRinse off with water or wipe off.
More about this problem
Sources (4)

Frequently asked

Quick answers.

When does Voss's laburnum flower?

In May; the flowers are yellow.

Does Voss's laburnum tolerate shade?

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

How much space does Voss's laburnum need?

At maturity 3–5 m wide and 5–8 m tall; recommended spacing 3 m.

Honey fungus — what can you do?

Choose the least susceptible species; risky ground after old trees have been felled. Once confirmed, dig up and destroy affected roots and stumps; sink a 45 cm deep plastic barrier into the soil. There is no chemical control for gardeners.

Silver leaf — what can you do?

Prune only in dry weather. Cut affected branches back to healthy wood.

Toxicity

Highly poisonous to people
Sources (21) Checked 24 October 2026

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