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Choose your climateBased on winter hardiness only.

Shrub · Malvaceae family

Rose of Sharon

Hibiscus syriacus

Full sun to part shade in a garden 3 ft 11¼ in–8 ft 2⅜ in × 2 ft 11⅜ in–5 ft 10⅞ in Flowers June–October to −84 °F
Flower colors Click a color

In short a 10-second read

SunFull sun to part shade
in a garden after 10 years3 ft 11¼ in–8 ft 2⅜ in
in the wild up to 11 ft 9¾ in
spacing 8 ft 2⅜ in
FlowersJune–October
PlantingApril–May
WinterNo winter protection

Where to plant and how much to water

Sun, soil and water.

It grows best in full sun to part shade, 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 averageclayloamysandy

Watering

only in dry spellsless when it rains

Frost

−84 °F
no winter protectionleafless 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 in7 ft 10½ in–11 ft 9¾ inspread 5 ft 10⅞ in–9 ft 10⅛ in
7 ft 10½ in–11 ft 9¾ in× spread 5 ft 10⅞ in–9 ft 10⅛ in

Plant 8 ft 2⅜ 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

June–October · pink, white, purple, red or blue

Planting

JanFebMarAprMayJunJulAugSepOctNovDec

container plant: April–May

Feeding

JanFebMarAprMayJunJulAugSepOctNovDec

May–June

Feeding

Nutrition.

Horn meal

up to 0.13 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.

What you will see

White powdery coating on leaves and shoots.

How to protect

  1. Prevention
    • open pruning, do not plant too densely
    • rake up and remove fallen leaves
  2. By hand when presentremove affected parts
  3. Gentle spray at the first symptomspotassium bicarbonate or horticultural oil (only for heavy infestation)
  4. Chemical — only when nothing else helps as per the labelOnly if the damage is severe: a product authorized in your country against: powdery mildew.
Powdery mildewsdisease

What you will see

White powdery coating on leaves and shoots.

How to protect

  1. Prevention
    • open pruning, do not plant too densely
    • rake up and remove fallen leaves
  2. By hand when presentremove affected parts
  3. Gentle spray at the first symptomspotassium bicarbonate or horticultural oil (only for heavy infestation)
  4. Chemical — only when nothing else helps as per the labelOnly if the damage is severe: a product authorized in your country against: powdery mildew.
More about this problem

What you will see

Mainly when grown under glass.

When to look

Spring and summer

How to protect

  1. Prevention
    • check young shoots, buds and leaf undersides often
    • tolerate small colonies – they are part of a healthy garden
  2. By hand spring–summersquash colonies with your fingers
  3. Biological all seasonencourage natural enemies: ladybirds, hoverflies, parasitoid wasps, ground beetles, earwigs
Aphidspest · spring and summer

What you will see

Mainly when grown under glass.

When to look

Spring and summer

How to protect

  1. Prevention
    • check young shoots, buds and leaf undersides often
    • tolerate small colonies – they are part of a healthy garden
  2. By hand spring–summersquash colonies with your fingers
  3. Biological all seasonencourage natural enemies: ladybirds, hoverflies, parasitoid wasps, ground beetles, earwigs
More about this problem

What you will see

Root rot and dieback of the shrub; white fungal sheets under the bark at the base.

When to look

Mushrooms in late summer and fall; mycelium in the soil all year

How to protect

  1. Prevention
    • do not plant in places with honey fungus
    • remove infected shrubs together with the roots
  2. By hand when presentdig out the infected shrub with its roots
Honey fungusdisease · mushrooms in late summer and fall; mycelium in the soil all year

What you will see

Root rot and dieback of the shrub; white fungal sheets under the bark at the base.

When to look

Mushrooms in late summer and fall; mycelium in the soil all year

How to protect

  1. Prevention
    • do not plant in places with honey fungus
    • remove infected shrubs together with the roots
  2. By hand when presentdig out the infected shrub with its roots
More about this problem
Sources (3)

Frequently asked

Quick answers.

When does rose of Sharon flower?

In June–October; the flowers are pink, white, purple, red or blue.

Does rose of Sharon tolerate shade?

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

How much space does rose of Sharon need?

At maturity 5 ft 10⅞ in–9 ft 10⅛ in wide and 7 ft 10½ in–11 ft 9¾ in tall; recommended spacing 8 ft 2⅜ in.

Powdery mildews — what can you do?

open pruning, do not plant too densely remove affected parts

Aphids — what can you do?

check young shoots, buds and leaf undersides often squash colonies with your fingers

Sources (17) Checked 24 October 2026

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