Is Rosemary an Evergreen? Yes, Here's Why

By Priya Sharma · January 24, 2026

Is Rosemary an Evergreen?

Yes, rosemary (Rosmarinus officinalis) is an evergreen herb, retaining its aromatic needle-like leaves year-round in suitable climates. It thrives as a perennial in USDA hardiness zones 7–10, making it a reliable garden staple for continuous harvest and ornamental use.

Understanding Rosemary’s Evergreen Nature

Rosemary is classified as an evergreen shrub, meaning it maintains foliage throughout the year, unlike deciduous plants that shed leaves seasonally. This characteristic makes it valuable in both culinary and landscaping applications.

Key Features of Evergreen Herbs

Retain leaves in winter
Provide year-round visual structure in gardens
Sustain photosynthesis during mild seasons
Offer consistent access to fresh herbs

In temperate regions, rosemary not only survives cold months but continues to grow slowly, especially when protected from frost.

Growing Conditions for Optimal Evergreen Performance

To ensure rosemary remains lush and green all year, specific growing conditions must be met:

Well-drained soil to prevent root rot
Full sun exposure (at least 6–8 hours daily)
Moderate watering with dry periods between irrigation
Protection from prolonged freezing temperatures

In colder zones (below zone 7), rosemary can be grown in containers and moved indoors during winter to preserve its evergreen qualities.

Cold Hardiness and Seasonal Behavior

While rosemary is evergreen, its resilience depends heavily on climate. Extended exposure to temperatures below 10°F (−12°C) can damage or kill the plant.

USDA Zone	Average Min Temp (°F)	Rosemary Survival	Foliage Retention
7	0 to 10	Survives with protection	Yes (with mulch)
8	10 to 20	Generally hardy	Yes
9	20 to 30	Hardy	Yes
10	30 to 40	Thrives	Yes
6	−10 to 0	Rarely survives outdoors	No (unless potted)

Table data source:1, 2

The data shows rosemary reliably retains foliage in zones 8–10, while marginal survival in zone 7 requires microclimate advantages or protective measures. In zone 6 and below, outdoor evergreen performance is unlikely without intervention.

Caring for Rosemary in Non-Evergreen Climates

Winter Protection Strategies

Use heavy mulching around the base
Grow in raised beds or containers for better drainage
Wrap plants with burlap in freeze-prone areas
Move potted plants indoors before first frost

Indoor care includes placing rosemary near south-facing windows, using grow lights if needed, and avoiding overwatering, which is a common cause of decline.

About Rosemary: Common Questions

Does rosemary lose its leaves in winter?

Rosemary does not naturally shed its leaves in winter. However, in cold climates (below USDA zone 7), frost damage or wet soil can cause browning and leaf drop. Proper drainage and frost protection help prevent this.

Can rosemary survive winter outdoors?

Yes, in USDA zones 7–10, rosemary typically survives winter outdoors. In colder zones, container growing with indoor overwintering is recommended for plant survival.

Is rosemary a perennial or annual?

Rosemary is a perennial evergreen shrub in warm climates (zones 7–10). In colder regions, it is often treated as an annual or overwintered indoors to maintain perennial growth.

How do I protect rosemary in winter?

Mulch heavily around the base, avoid wet soil, and cover with burlap during freezes. For potted plants, move indoors to a sunny location and reduce watering frequency.

Can you harvest rosemary year-round?

Yes, in warm climates, rosemary can be harvested year-round due to its evergreen nature. Indoors or in greenhouses, continuous harvesting is also possible with adequate light and care.