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Annual · Balsaminaceae family

Impatiens

Impatiens walleriana

Full sun to shade 5⅞ in–1 ft 11⅝ in × 5⅞ in–1 ft 11⅝ in Flowers June–October Low maintenance
Flower colors Click a color

In short a 10-second read

SunFull sun to shade
Size5⅞ in–1 ft 11⅝ in
spacing 9¾ in
FlowersJune–October
PlantingMay
Care levelLow maintenance

Where to plant and how much to water

Sun, soil and water.

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

Sun

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

Soil

tolerates any pH
acidicneutralalkaline
average to moisthumus-richloamy

Watering

keep the soil evenly moistdo not waterlogless when it rains

How much space it takes

Mature size.

The mature plant next to a person (69 in).

19¾ in3 ft 3⅜ in4 ft 11 in5⅞ in–1 ft 11⅝ inspread 5⅞ in–1 ft 11⅝ in
5⅞ in–1 ft 11⅝ in× spread 5⅞ in–1 ft 11⅝ in

Plant 9¾ in apart.

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: DecemberSowing: JanuarySowing: FebruarySowing: MarchSowing: AprilSowing: MaySowing: JuneSowing: JulySowing: AugustSowing: SeptemberSowing: OctoberSowing: NovemberSowing: DecemberPlanting: JanuaryPlanting: FebruaryPlanting: MarchPlanting: AprilPlanting: MayPlanting: JunePlanting: JulyPlanting: AugustPlanting: SeptemberPlanting: OctoberPlanting: NovemberPlanting: DecemberJanFebMarAprMayJunJulAugSepOctNovDec
FlowersSowingPlanting
Now, in October: nothing to do — the next job is in January.
JanFebMarAprMayJunJulAugSepOctNovDec

Flowers

JanFebMarAprMayJunJulAugSepOctNovDec

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

Sowing

JanFebMarAprMayJunJulAugSepOctNovDec

sow indoors: January–February

Planting

JanFebMarAprMayJunJulAugSepOctNovDec

transplant outdoors: May

Feeding

Nutrition.

Moderate
balanced fertilizer

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 riskpest
More about this problem

What you will see

Adult weevils chew notches in leaf edges; white grubs eat the roots, especially in containers, and the plant wilts.

The source says: it is among the other susceptible plants.

How to protect

  1. Prevention
    • Check container plants often and look for notches on the leaves.
  2. By handCollect the adult weevils in the evening with a torch; when repotting, remove the grubs from the roots.
  3. BiologicalNematodes that attack the grubs can be watered into the compost.
Vine weevilpestMedium risk

What you will see

Adult weevils chew notches in leaf edges; white grubs eat the roots, especially in containers, and the plant wilts.

The source says: it is among the other susceptible plants.

How to protect

  1. Prevention
    • Check container plants often and look for notches on the leaves.
  2. By handCollect the adult weevils in the evening with a torch; when repotting, remove the grubs from the roots.
  3. BiologicalNematodes that attack the grubs can be watered into the compost.
More about this problem

Impatiens downy mildew

Plasmopara obducens
disease

What you will see

Leaves turn yellow and drop quickly, and a fine white growth may appear on the underside. Flowers drop too and the plant is left almost bare; badly affected plants die.

When to look

Summer

How to protect

  1. Prevention
    • The disease affects only impatiens: do not plant impatiens on the affected area for at least a year.
    • Choose New Guinea impatiens (Impatiens hawkeri), which resists downy mildew, or downy-mildew-resistant cultivars of busy lizzie.
    • In containers that held diseased plants, replace the compost and disinfect the container before planting impatiens again.
  2. By hand as soon as it appearsRemove affected plants as soon as possible and do not compost them; burn them or bury them deeper than 19¾ in.
Impatiens downy mildewdisease · summer

What you will see

Leaves turn yellow and drop quickly, and a fine white growth may appear on the underside. Flowers drop too and the plant is left almost bare; badly affected plants die.

When to look

Summer

How to protect

  1. Prevention
    • The disease affects only impatiens: do not plant impatiens on the affected area for at least a year.
    • Choose New Guinea impatiens (Impatiens hawkeri), which resists downy mildew, or downy-mildew-resistant cultivars of busy lizzie.
    • In containers that held diseased plants, replace the compost and disinfect the container before planting impatiens again.
  2. By hand as soon as it appearsRemove affected plants as soon as possible and do not compost them; burn them or bury them deeper than 19¾ in.

What you will see

Clusters of tiny sap-sucking insects on young shoots, curled leaves, sticky honeydew and sooty mold.

When to look

Spring – summer

How to protect

  1. Prevention
    • Aphids are part of a healthy garden and food for predators; a healthy plant usually tolerates them.
  2. By handWipe or rinse off colonies and remove affected tips.
  3. BiologicalEncourage natural enemies (ladybirds, earwigs, birds).
Aphidspest · spring – summer

What you will see

Clusters of tiny sap-sucking insects on young shoots, curled leaves, sticky honeydew and sooty mold.

When to look

Spring – summer

How to protect

  1. Prevention
    • Aphids are part of a healthy garden and food for predators; a healthy plant usually tolerates them.
  2. By handWipe or rinse off colonies and remove affected tips.
  3. BiologicalEncourage natural enemies (ladybirds, earwigs, birds).
More about this problem

What you will see

Leaves are speckled and bronzing, with fine webbing on the underside.

How to protect

  1. Prevention
    • Reduce dust and water stress; do not use broad-spectrum insecticides, which cause mite outbreaks.
  2. By handA strong jet of water on the underside of leaves.
  3. Gentle sprayInsecticidal soap or oil, thoroughly on the undersides; only after mites are confirmed.
Spider mitespest

What you will see

Leaves are speckled and bronzing, with fine webbing on the underside.

How to protect

  1. Prevention
    • Reduce dust and water stress; do not use broad-spectrum insecticides, which cause mite outbreaks.
  2. By handA strong jet of water on the underside of leaves.
  3. Gentle sprayInsecticidal soap or oil, thoroughly on the undersides; only after mites are confirmed.
More about this problem

What you will see

Irregular holes in leaves and slime trails, especially on young plants in damp weather.

How to protect

  1. Prevention
    • Changing growing practices is the best strategy; protect young plants.
  2. By handEvening collection by torchlight in damp weather; barriers (copper tape, wool pellets).
  3. Biological moist, warm soilPhasmarhabditis hermaphrodita nematodes watered into the soil.
Slugs and snailspest

What you will see

Irregular holes in leaves and slime trails, especially on young plants in damp weather.

How to protect

  1. Prevention
    • Changing growing practices is the best strategy; protect young plants.
  2. By handEvening collection by torchlight in damp weather; barriers (copper tape, wool pellets).
  3. Biological moist, warm soilPhasmarhabditis hermaphrodita nematodes watered into the soil.
More about this problem

What you will see

White powdery coating on leaves, stems and flowers; leaves may become distorted.

How to protect

  1. Prevention
    • Destroy fallen infected leaves in fall; do not over-feed, and protect from drought (stress invites powdery mildew).
  2. By hand fallPrune out infected shoots early and destroy fallen leaves.
Powdery mildewsdisease

What you will see

White powdery coating on leaves, stems and flowers; leaves may become distorted.

How to protect

  1. Prevention
    • Destroy fallen infected leaves in fall; do not over-feed, and protect from drought (stress invites powdery mildew).
  2. By hand fallPrune out infected shoots early and destroy fallen leaves.
More about this problem

What you will see

Yellowing and wilting leaves, dieback of shoots.

How to protect

  1. Prevention
    • Do not carry soil on tools and shoes; control weeds.
  2. By handDig up a confirmed plant with its roots and destroy it; consider grassing over the area or a resistant replacement.
Verticillium wiltdisease

What you will see

Yellowing and wilting leaves, dieback of shoots.

How to protect

  1. Prevention
    • Do not carry soil on tools and shoes; control weeds.
  2. By handDig up a confirmed plant with its roots and destroy it; consider grassing over the area or a resistant replacement.
More about this problem
Sources (8)

Frequently asked

Quick answers.

When does impatiens flower?

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

When do I sow impatiens?

In January–February (sow indoors).

Does impatiens tolerate shade?

Yes, it tolerates full shade.

How much space does impatiens need?

At maturity 5⅞ in–1 ft 11⅝ in wide and 5⅞ in–1 ft 11⅝ in tall; recommended spacing 9¾ in.

Impatiens downy mildew — what can you do?

The disease affects only impatiens: do not plant impatiens on the affected area for at least a year. Remove affected plants as soon as possible and do not compost them; burn them or bury them deeper than 19¾ in.

Aphids — what can you do?

Aphids are part of a healthy garden and food for predators; a healthy plant usually tolerates them. Wipe or rinse off colonies and remove affected tips.

Sources (8) Checked 23 October 2026

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