Shrub · Ericaceae family

Rhododendron

Rhododendron (Garden Hybrids)

Part shade to shade in a garden 1–1.8 m × 1–1.8 m Flowers April–June to −23 °C
Flower colours Click a colour

In short a 10-second read

LightPart shade to shade
in a garden after 10 years1–1.8 m
in the wild up to 2.5 m
spacing 1 m
FlowersApril–June
PlantingMarch–April, October
Care levelModerate care

Where to plant and how much to water

Light, soil and water.

It grows best in part shade to shade, in average to moist soil.

Sun

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

Soil

acidic soil
acidicneutralalkaline
average to moisthumus-richloamysandy

Watering

keep the soil evenly moistonly in dry spellsless when it rains

Frost

−23 °C

How much space it takes

Mature size.

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

1 m2 m0.5–2.5 mspread 0.5–4 m
0.5–2.5 m× spread 0.5–4 m

Plant 1 m apart.

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: DecemberJanFebMarAprMayJunJulAugSepOctNovDec
FlowersPlanting
Now, in October: a good time for planting (container plant).
JanFebMarAprMayJunJulAugSepOctNovDec

Flowers

JanFebMarAprMayJunJulAugSepOctNovDec

April–June · yellow, orange, pink, purple, red or white

Planting

JanFebMarAprMayJunJulAugSepOctNovDec

container plant: March–April, October

What to plant now (October) full list in October (244) →

Feeding

Nutrition.

No feeding

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
Vine weevil

Vine weevil

Otiorhynchus sulcatus
Medium riskpestsource covers the whole genus
More about this problem

What you will see

Adults notch the leaf edges; white larvae eat the roots, mainly in containers, and the plant wilts.

The source says: it can be troublesome on rhododendrons, especially in containers.

How to protect

  1. Prevention
    • Check container plants often; look for notches on leaves.
  2. By handCollect adults in the evening by torchlight; when repotting, remove larvae from the roots.
Vine weevilpestMedium risk

What you will see

Adults notch the leaf edges; white larvae eat the roots, mainly in containers, and the plant wilts.

The source says: it can be troublesome on rhododendrons, especially in containers.

How to protect

  1. Prevention
    • Check container plants often; look for notches on leaves.
  2. By handCollect adults in the evening by torchlight; when repotting, remove larvae from the roots.
More about this problem

Phytophthora root rot

Medium riskdiseasesource covers the whole genus
More about this problem

What you will see

Wilting, yellow or thin foliage, dieback of branches.

The source says: it is among the plants commonly affected by Phytophthora.

How to protect

  1. Prevention
    • Improve drainage; do not plant sensitive species on heavy, waterlogged soils.
  2. By handFor a local outbreak, destroy the plants and replace the soil in the root zone; plant a less susceptible species.
Phytophthora root rotdiseaseMedium risk

What you will see

Wilting, yellow or thin foliage, dieback of branches.

The source says: it is among the plants commonly affected by Phytophthora.

How to protect

  1. Prevention
    • Improve drainage; do not plant sensitive species on heavy, waterlogged soils.
  2. By handFor a local outbreak, destroy the plants and replace the soil in the root zone; plant a less susceptible species.
More about this problem

Lace bug

Medium riskpestsource covers the whole genus
More about this problem

What you will see

Pale speckles on the leaves.

The source says: it is a fairly common pest of certain rhododendrons.

How to protect

  1. Chemical — only when nothing else helps as per the labelOnly if the damage is severe: a product authorised in your country against: lace bug.
Lace bugpestMedium risk

What you will see

Pale speckles on the leaves.

The source says: it is a fairly common pest of certain rhododendrons.

How to protect

  1. Chemical — only when nothing else helps as per the labelOnly if the damage is severe: a product authorised in your country against: lace bug.
More about this problem
Sources (4)

What to combine it with

Same needs, different flowering.

They share the same sun and soil and flower in other months — so the bed flowers for longer.

Frequently asked

Quick answers.

When does rhododendron flower?

In April–June; the flowers are yellow, orange, pink, purple, red or white.

Does rhododendron tolerate shade?

Yes, it tolerates full shade.

How much space does rhododendron need?

At maturity 0.5–4 m wide and 0.5–2.5 m tall; recommended spacing 1 m.

Vine weevil — what can you do?

Check container plants often; look for notches on leaves. Collect adults in the evening by torchlight; when repotting, remove larvae from the roots.

Phytophthora root rot — what can you do?

Improve drainage; do not plant sensitive species on heavy, waterlogged soils. For a local outbreak, destroy the plants and replace the soil in the root zone; plant a less susceptible species.

Sources (9) Checked 23 October 2026

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