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Herb · Lamiaceae family

Basil

Ocimum basilicum

Full sun 0.2–0.5 m × 0.2–0.3 m Flowers June–September Harvest June–August Moderate care
Flower colours Click a colour

In short a 10-second read

SunFull sun
Size0.2–0.5 m
spacing 25 cm
FlowersJune–September
PlantingJune
Care levelModerate care

Where to plant and how much to water

Sun, soil and water.

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

Sun

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

Soil

tolerates any pH
acidicneutralalkaline
average to moistloamyhumus-rich

Watering

Basil — Watering
keep the soil evenly moistless when it rains

How much space it takes

Mature size.

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

50 cm1 m1.5 m0.2–0.5 mspread 0.2–0.3 m
0.2–0.5 m× spread 0.2–0.3 m

Plant 25 cm apart.

How to plant: staggered, 25 cm 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: DecemberSowing: JanuarySowing: FebruarySowing: MarchSowing: AprilSowing: MaySowing: JuneSowing: JulySowing: AugustSowing: SeptemberSowing: OctoberSowing: NovemberSowing: DecemberPlanting: JanuaryPlanting: FebruaryPlanting: MarchPlanting: AprilPlanting: MayPlanting: JunePlanting: JulyPlanting: AugustPlanting: SeptemberPlanting: OctoberPlanting: NovemberPlanting: DecemberFeeding: JanuaryFeeding: FebruaryFeeding: MarchFeeding: AprilFeeding: MayFeeding: JuneFeeding: JulyFeeding: AugustFeeding: SeptemberFeeding: OctoberFeeding: NovemberFeeding: DecemberHarvest: JanuaryHarvest: FebruaryHarvest: MarchHarvest: AprilHarvest: MayHarvest: JuneHarvest: JulyHarvest: AugustHarvest: SeptemberHarvest: OctoberHarvest: NovemberHarvest: DecemberJanFebMarAprMayJunJulAugSepOctNovDec
FlowersSowingPlantingFeedingHarvest
Now, in October: nothing to do — the next job is in March. · watch for grey mould.
JanFebMarAprMayJunJulAugSepOctNovDec

Flowers

JanFebMarAprMayJunJulAugSepOctNovDec

June–September · white

Sowing

JanFebMarAprMayJunJulAugSepOctNovDec

sow indoors: March–April

Planting

JanFebMarAprMayJunJulAugSepOctNovDec

transplant outdoors: June

Feeding

JanFebMarAprMayJunJulAugSepOctNovDec

March–April

Harvest

JanFebMarAprMayJunJulAugSepOctNovDec

June–August

Feeding

Nutrition.

Basil — Feeding
Compost

3 l/m² once in spring · March–April

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, stems and flowers; leaves may become distorted.

When to look

From spring onwards

How to protect

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

What you will see

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

When to look

From spring onwards

How to protect

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

What you will see

Coarse pale speckling on the upper leaf surfaces; leafhoppers on the undersides.

When to look

JanFebMarAprMayJunJulAugSepOctNovDec
June–September

How to protect

  1. Prevention
    • Affected herbs are safe to eat; no control is needed.
  2. BiologicalEncourage natural enemies (ladybirds, wasps, ground beetles, birds).
Sage and Ligurian leafhopperspest · June–September

What you will see

Coarse pale speckling on the upper leaf surfaces; leafhoppers on the undersides.

When to look

JanFebMarAprMayJunJulAugSepOctNovDec
June–September

How to protect

  1. Prevention
    • Affected herbs are safe to eat; no control is needed.
  2. BiologicalEncourage natural enemies (ladybirds, wasps, ground beetles, birds).
More about this problem

What you will see

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

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 mould.

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
Damping off

Damping off

disease

What you will see

Seedlings collapse, often covered in white mould.

How to protect

  1. Prevention
    • Sow into fresh shop-bought compost; fungicides are not available, so preventive measures are key.
  2. By handDo not overwater; keep containers clean and the air moving.
Damping offdisease

What you will see

Seedlings collapse, often covered in white mould.

How to protect

  1. Prevention
    • Sow into fresh shop-bought compost; fungicides are not available, so preventive measures are key.
  2. By handDo not overwater; keep containers clean and the air moving.
Grey mould

Grey mould

Botrytis cinerea
disease
More about this problem

What you will see

Fuzzy grey-brown mould on dying buds, leaves, flowers and fruit.

When to look

JanFebMarAprMayJunJulAugSepOctNovDec
June–October

How to protect

  1. Prevention
    • Reduce humidity, improve airflow and do not plant too densely.
  2. By handQuickly remove dead and affected parts (carefully, as spores spread easily), ideally into a bag.
Grey moulddisease · June–October

What you will see

Fuzzy grey-brown mould on dying buds, leaves, flowers and fruit.

When to look

JanFebMarAprMayJunJulAugSepOctNovDec
June–October

How to protect

  1. Prevention
    • Reduce humidity, improve airflow and do not plant too densely.
  2. By handQuickly remove dead and affected parts (carefully, as spores spread easily), ideally into a bag.
More about this problem
Sources (7)

What to combine it with

Ready-made combinations.

Frequently asked

Quick answers.

When does basil flower?

In June–September; the flowers are white.

When do I sow basil?

In March–April (sow indoors).

When is basil harvested?

In June–August.

Does basil tolerate shade?

No, it needs full sun.

How much space does basil need?

At maturity 0.2–0.3 m wide and 0.2–0.5 m tall; recommended spacing 25 cm.

Powdery mildews — what can you do?

Destroy fallen infected leaves in autumn; do not over-feed, and protect from drought (stress invites powdery mildew). Prune out infected shoots early and destroy fallen leaves.

Sage and Ligurian leafhoppers — what can you do?

Affected herbs are safe to eat; no control is needed. Encourage natural enemies (ladybirds, wasps, ground beetles, birds).

Sources (5) Checked 20 October 2026

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