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Perennial · Ranunculaceae family

Candle larkspur

Delphinium elatum

Full sun 0.9–1.5 m × 0.6–0.9 m Flowers June–July to −37 °C
Flower colours Click a colour

In short a 10-second read

SunFull sun
Size0.9–1.5 m
spacing 60 cm
FlowersJune–July
PlantingApril–June
WinterMulch around the base
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, in average soil.

Sun

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

Soil

neutral to alkaline soil
acidicneutralalkaline
averagehumus-richloamy

Watering

only in dry spellsless when it rains

Frost

−37 °C
mulch around the basedies 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 m0.9–1.5 mspread 0.6–0.9 m
0.9–1.5 m× spread 0.6–0.9 m

Plant 60 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: nothing to do — the next job is in April.
JanFebMarAprMayJunJulAugSepOctNovDec

Flowers

JanFebMarAprMayJunJulAugSepOctNovDec

June–July · blue, purple, white or pink

Planting

JanFebMarAprMayJunJulAugSepOctNovDec

container plant: April–June

Feeding

JanFebMarAprMayJunJulAugSepOctNovDec

March–May

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.

High riskMedium riskLow riskRisk for this plant according to the source · no label = no documented level

What you will see

Eaten holes in leaves and young shoots, at night and in damp weather. Young leaves are particularly at risk.

The source says: it is among the plants that slugs and snails seriously damage.

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 snailspestHigh risk

What you will see

Eaten holes in leaves and young shoots, at night and in damp weather. Young leaves are particularly at risk.

The source says: it is among the plants that slugs and snails seriously damage.

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

What you will see

White powdery coating on leaves and stems.

The source says: it is among the ornamental plants susceptible to powdery mildew.

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 onwardsMedium risk

What you will see

White powdery coating on leaves and stems.

The source says: it is among the ornamental plants susceptible to powdery mildew.

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

Delphinium black blotch

Pseudomonas syringae pv. delphinii
disease

What you will see

Shiny brown-black round spots on leaves, stems and flowers; the plant becomes stunted.

When to look

In wet summers

How to protect

  1. Prevention
    • Do not buy plants with spots on the leaves.
    • Do not collect seed from affected plants.
    • Plant replacements in a new place.
  2. By hand once noticedRemove affected leaves straight away and put them in the bin (not on the compost); cut heavily affected plants back to just above ground level.
Delphinium black blotchdisease · in wet summers

What you will see

Shiny brown-black round spots on leaves, stems and flowers; the plant becomes stunted.

When to look

In wet summers

How to protect

  1. Prevention
    • Do not buy plants with spots on the leaves.
    • Do not collect seed from affected plants.
    • Plant replacements in a new place.
  2. By hand once noticedRemove affected leaves straight away and put them in the bin (not on the compost); cut heavily affected plants back to just above ground level.

Larkspur leafminer

Phytomyza aconiti
pest

What you will see

Large grey-brown mines in the leaves, mainly near the leaflet tip.

When to look

JanFebMarAprMayJunJulAugSepOctNovDec
June–July

How to protect

  1. Prevention
    • Check the leaves in summer.
  2. By hand June to JulyRemove affected leaves.
Larkspur leafminerpest · June–July

What you will see

Large grey-brown mines in the leaves, mainly near the leaflet tip.

When to look

JanFebMarAprMayJunJulAugSepOctNovDec
June–July

How to protect

  1. Prevention
    • Check the leaves in summer.
  2. By hand June to JulyRemove affected leaves.
Sources (8)

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.

Bluebeard

Bluebeard

0.61–1 m
✓flowers July–October
✓lower — for the front
Southern Globe Thistle

Southern Globe Thistle

0.9–1.2 m
✓flowers July–September
✓lower — for the front
garden chrysanthemum

garden chrysanthemum

0.3–0.91 m
✓flowers September–October
✓lower — for the front

Frequently asked

Quick answers.

When does candle larkspur flower?

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

Does candle larkspur tolerate shade?

No, it needs full sun.

How much space does candle larkspur need?

At maturity 0.6–0.9 m wide and 0.9–1.5 m tall; recommended spacing 60 cm.

Slugs and snails — what can you do?

Water in the morning, not in the evening. Collect 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.

Powdery mildews — what can you do?

Plant in a sunny, airy spot with good drainage. Cut out affected shoots; in autumn remove and destroy fallen affected leaves.

Toxicity

Highly poisonous to people
Sources (17) Checked 24 October 2026

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