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USA plant library · herb

Thyme

Thymus vulgaris · Lamiaceae

Low-growing perennial culinary herb

Thyme

Photo: Isidre blanc, CC BY-SA 4.0, via Wikimedia Commons

Sun
Full sun
Soil
Well-drained, lean, sandy soil
Soil pH
About 6.0-7.5 (neutral to alkaline)
Water
Low
Hardiness
USDA zones 5-9
Height and spread
6-12 in tall x 6-16 in wide, a low spreading mound

Guv's tipThyme likes lean, sandy soil and little water. Shear after flowering, and renew woody plants every few years. Best harvested just before flowering.

Through the year

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Sow or plant

Months are a rough guide. Time it by your own frost dates.

When to plant

Spring (Apr-May)

Harvest or flowering

Flowers in summer. Harvest leaves throughout the growing season, best just before flowering

Pruning

Shear after flowering. Renew woody plants every few years

Making more plants

Cuttings, division or layering

Watch out for

Pest

Spider mites

Look for: Stippled, yellowing leaves, weakened growth

What to do: Hose off; insecticidal soap

Pest

Aphids

Look for: Clusters on shoots, honeydew

What to do: Hose off; insecticidal soap

Disease

Root rot

Soilborne fungi incl. Rhizoctonia

Look for: Wilting, browning, collapse in wet soils

What to do: Sharp drainage, avoid overwatering

Disease

Gray mold

Botrytis cinerea

Look for: Fuzzy gray growth on stems/leaves in damp weather

What to do: Air circulation, avoid wet foliage, remove affected growth

Always read and follow the label on any treatment, and check it is approved for use where you live.

Safety and spread

Pets and people: Non-toxic to dogs, cats and horses (ASPCA, NC State Extension)

Weed risk: None known

Checked against two or more reputable gardening sources. How we check our facts

Growing somewhere else? See this plant for the UK and Australia.

Keep it by the back door

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Printable pest and disease charts with real photographs, and all 50 USA plants in one book.

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