perennialN. America Native

Canada Lettuce

Lactuca canadensis

The Story

Plant Bio

Lactuca canadensis, the Canada lettuce, is an erect biennial herb native to North America that forms a low basal rosette in its first year before bolting upward on a single unbranched stem. The highly variable, alternate foliage lacks the prickles of introduced weedy relatives and exudes a distinctive tan-to-orange milky latex when broken.

During its second-year reproductive phase, the plant produces a massive architectural flower spike reaching up to fifteen feet tall. This terminal panicle bears numerous small, yellow-to-orange composite flower heads that open in succession from midsummer through early fall.

Uses & Benefits:

Provides a dramatic, tall architectural element in wild or prairie-style gardens during its second-year bolting phase.

Thrives in poor, disturbed soils where other ornamental plants struggle, requiring no supplemental watering once established.

Supports native bees and other insect pollinators with its abundant summer flowers, and provides seed for small wildlife.

Essentials

At a Glance

Plant Type

Perennial

Height

86"

Width

24"

Light

Full Sun, Partial Sun

Zones

4, 5, 6, 7, 8, 9

Water

Low to medium

Humidity

High

Lifespan

Biennial

Native To

North America

Toxicity

Skin Irritant / Toxic if Ingested

Bloom period

Summer – Early fall

In flower about 4 months of the year

Planting

How to Grow

Sow seeds shallowly in spring or fall, pressing them lightly into the soil surface as they require light to germinate.
Select a site in full sun to partial shade with well-drained loam, clay, or sandy soil.
Water young seedlings regularly to establish the root system, though mature plants tolerate dry periods.
Monitor the first-year rosettes for slugs and snails, protecting them with physical barriers if necessary.

Pro Tip

To prevent aggressive self-seeding in naturalized areas, cut the central flowering stalk down to the ground immediately after the flowers fade and before the seed heads dry and split open.

Keep It Thriving

Care Guide

Do

Wear gloves when handling or cutting the stems to avoid skin irritation from the milky latex sap.
Allow the plant to bolt if a tall, architectural structure is desired in a wild garden setting.
Remove spent flower heads promptly if you wish to control its spread.

Don't

Do not apply supplemental fertilizer, as this species thrives and bolts readily in poor, disturbed soils.
Do not ingest raw wild plants in large quantities due to the presence of toxic bitter compounds.
Do not plant in highly manicured borders where its tall, wild habit and self-seeding nature will disrupt the design.

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Pest Check
Plant
Prune
Spring Cleanup

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Wild and Naturalistic GardensPollinator GardensMeadow PlantingsArchitectural Accents

Companion Plants

Symphyotrichum novae-angliae Rudbeckia hirta

Multiply

Propagation Methods

Good to Know

Common Questions

Canada Lettuce questions

What zones can Canada Lettuce grow in?

Canada Lettuce is hardy in USDA Zones 4–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Canada Lettuce deer resistant?

Not reliably. Deer may browse Canada Lettuce, especially tender spring growth — plan on repellents or fencing where pressure is high.

When does Canada Lettuce bloom?

Canada Lettuce typically blooms in summer through early fall. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Canada Lettuce need full sun?

Canada Lettuce does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.

Is Canada Lettuce drought tolerant?

Yes — once established (usually after the first full season), Canada Lettuce handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.