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Raised bed I – solid 60 mm European larchRaised bed IRaised bedsRaised bed L – solid 60 mm European larchRaised bed LRaised bedsRaised bed U – solid 60 mm European larchRaised bed URaised bedsBed I with bench – solid 60 mm European larchBed I with benchRaised bedsBed L with bench – solid 60 mm European larchBed L with benchRaised bedsSolid bench – solid 60 mm European larchSolid benchSeatingPedestal bench – solid 60 mm European larchPedestal benchSeatingBench with planter – solid 60 mm European larchBench with planterSeatingGarden table – solid 60 mm European larchGarden tableSeatingTable and two benches – solid 60 mm European larchTable and two benchesSeatingSandbox with seating – solid 60 mm European larchSandbox with seatingFor kidsGarden steps – solid 60 mm European larchGarden stepsSlope & terrace

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Perennial · Geraniaceae family

Hardy geranium

Geranium macrorrhizum

Full sun to shade 0.3–0.45 m × 0.3–0.6 m Flowers May–July to −32 °C
Flower colours Click a colour

In short a 10-second read

SunFull sun to shade
Size0.3–0.45 m
spacing 40 cm
FlowersMay–July
PlantingMarch–May, September–October
WinterNo winter protection

Where to plant and how much to water

Sun, soil and water.

It grows best in full sun to 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 averageloamysandygravelly

Watering

drought tolerant once establishedless when it rains

Frost

−32 °C
no winter protectiondies back in winter, regrows in spring

How much space it takes

Mature size.

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

50 cm1 m1.5 m0.3–0.45 mspread 0.3–0.6 m
0.3–0.45 m× spread 0.3–0.6 m

Plant 40 cm apart.

Reaches maturity in about 2–5 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). · watch for vine weevil.
JanFebMarAprMayJunJulAugSepOctNovDec

Flowers

JanFebMarAprMayJunJulAugSepOctNovDec

May–July · pink, purple or white

Planting

JanFebMarAprMayJunJulAugSepOctNovDec

container plant: March–May, September–October

Feeding

JanFebMarAprMayJunJulAugSepOctNovDec

March–May

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

Feeding

Nutrition.

Light
balanced fertilisercompost or mulch
JanFebMarAprMayJunJulAugSepOctNovDec

Pests and diseases

Common problems and what to do.

The most common problems in Central Europe. Protection is listed from the gentlest option.

Vine weevil

Vine weevil

Otiorhynchus sulcatus
pestsource covers the whole genus
More about this problem

What you will see

Adult beetles notch the leaf edges; grubs eat the roots, the plant wilts, especially in a pot.

When to look

JanFebMarAprMayJunJulAugSepOctNovDec
September–March

How to protect

  1. Prevention
    • Check potted plants especially in autumn and winter.
    • Encourage natural enemies (birds, toads, hedgehogs, ground beetles).
  2. By hand summer; losses mainly September to MarchIn the evening, collect adult beetles with a torch; if a plant wilts, lift it and remove the grubs from the roots and compost.
  3. Biological August to early SeptemberNematodes (Steinernema 5–20 °C, Heterorhabditis 12–20 °C) into warm soil while the grubs are small; they work poorly in dry and heavy soil.
Vine weevilpest · September–March

What you will see

Adult beetles notch the leaf edges; grubs eat the roots, the plant wilts, especially in a pot.

When to look

JanFebMarAprMayJunJulAugSepOctNovDec
September–March

How to protect

  1. Prevention
    • Check potted plants especially in autumn and winter.
    • Encourage natural enemies (birds, toads, hedgehogs, ground beetles).
  2. By hand summer; losses mainly September to MarchIn the evening, collect adult beetles with a torch; if a plant wilts, lift it and remove the grubs from the roots and compost.
  3. Biological August to early SeptemberNematodes (Steinernema 5–20 °C, Heterorhabditis 12–20 °C) into warm soil while the grubs are small; they work poorly in dry and heavy soil.
More about this problem

Geranium sawfly

Ametastegia carpini
pestsource covers the whole genus

What you will see

Small holes in leaves from grey-green caterpillars up to 12 mm; the damage is only unsightly.

When to look

JanFebMarAprMayJunJulAugSepOctNovDec
May–September

How to protect

  1. Prevention
    • From May, check the plants.
  2. By hand May and SeptemberPick off the caterpillars by hand.
Geranium sawflypest · May–September

What you will see

Small holes in leaves from grey-green caterpillars up to 12 mm; the damage is only unsightly.

When to look

JanFebMarAprMayJunJulAugSepOctNovDec
May–September

How to protect

  1. Prevention
    • From May, check the plants.
  2. By hand May and SeptemberPick off the caterpillars by hand.
Slugs and snails

Slugs and snails

pestsource covers the whole genus
More about this problem

What you will see

Eaten holes in leaves and young shoots, at night and in damp weather.

How to protect

  1. Prevention
    • Water in the morning, not in the evening.
    • In winter turn over the soil and remove fallen leaves — birds will pick out the eggs.
    • Encourage natural enemies (birds, toads, hedgehogs, ground beetles).
  2. By hand evening, spring to autumnCollect slugs and snails in the evening by torchlight on a warm, damp night; traps made of hollowed-out citrus peel or small containers of beer sunk into the soil — empty them in the morning.
  3. Biological spring to early autumnPhasmarhabditis hermaphrodita nematodes (they work on slugs, hardly on snails); apply to moist soil at 5–20 °C.
Slugs and snailspest

What you will see

Eaten holes in leaves and young shoots, at night and in damp weather.

How to protect

  1. Prevention
    • Water in the morning, not in the evening.
    • In winter turn over the soil and remove fallen leaves — birds will pick out the eggs.
    • Encourage natural enemies (birds, toads, hedgehogs, ground beetles).
  2. By hand evening, spring to autumnCollect slugs and snails in the evening by torchlight on a warm, damp night; traps made of hollowed-out citrus peel or small containers of beer sunk into the soil — empty them in the morning.
  3. Biological spring to early autumnPhasmarhabditis hermaphrodita nematodes (they work on slugs, hardly on snails); apply to moist soil at 5–20 °C.
More about this problem
Powdery mildews

Powdery mildews

diseasesource covers the whole genus
More about this problem

What you will see

White powdery coating on leaves and stems.

When to look

From spring onwards

How to protect

  1. Prevention
    • Plant in a sunny, airy spot with good drainage.
    • Water in dry spells; plants that dry out are more susceptible.
    • Do not over-feed with nitrogen.
    • Water in the morning and do not leave leaves wet for long.
  2. By hand summer, autumnCut out affected shoots; in autumn remove and destroy fallen affected leaves.
Powdery mildewsdisease · from spring onwards

What you will see

White powdery coating on leaves and stems.

When to look

From spring onwards

How to protect

  1. Prevention
    • Plant in a sunny, airy spot with good drainage.
    • Water in dry spells; plants that dry out are more susceptible.
    • Do not over-feed with nitrogen.
    • Water in the morning and do not leave leaves wet for long.
  2. By hand summer, autumnCut out affected shoots; in autumn remove and destroy fallen affected leaves.
More about this problem
Sources (6)

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.

common snowdrop

common snowdrop

0.1–0.25 m
✓flowers February–March
✓lower — for the front
busy lizzie

busy lizzie

0.15–0.6 m
✓flowers June–October
✓taller — for the back
wax begonia

wax begonia

0.15–0.3 m
✓flowers May–October
✓lower — for the front

Frequently asked

Quick answers.

When does hardy geranium flower?

In May–July; the flowers are pink, purple or white.

Does hardy geranium tolerate shade?

Yes, it tolerates full shade.

How much space does hardy geranium need?

At maturity 0.3–0.6 m wide and 0.3–0.45 m tall; recommended spacing 40 cm.

Vine weevil — what can you do?

Check potted plants especially in autumn and winter. In the evening, collect adult beetles with a torch; if a plant wilts, lift it and remove the grubs from the roots and compost.

Geranium sawfly — what can you do?

From May, check the plants. Pick off the caterpillars by hand.

Sources (22) Checked 24 October 2026

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