Garden lettuce
Lactuca sativa
A cool-season leafy green eaten raw or lightly cooked - among the most fundamental garden vegetables. Bolts (sends up flower stalks) + turns bitter in heat above 70°F per NC State; cool-spring + cool-fall windows are the productive growing periods in most North American climates. Four habit groups: head (iceberg, crisphead), loose-leaf, romaine (cos), and butterhead (Bibb, Boston).
Edible
Container
Light
Full sun / Part shade
Water
Consistent moisture
Mature size
6-12" tall · 8" apart
Hardy in zones
Annual; NC State profile lists 2a-11b context
AHS heat range
1-6
Plant range authored in AHS heat-zone terms.
Native in Illinois
No
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NC State: "Leaves can be used raw or cooked in salads, sandwiches, and other dishes." Four cultivar groups: head (iceberg, crisphead), loose-leaf, romaine (cos), and butterhead (Bibb, Boston).
Cold hardiness
This plant is grown as an annual; hardiness zones don't apply.
Heat tolerance
Heat tolerance values are location-based too: heat days today are observed at this site, and the 2050 value projects this same location under a future climate.
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Similar plants
Browse lateral options with similar roles, light needs, size, or native-range overlap; these are not filtered for a better climate fit.
Appears in collections
Educator packet
Plant packet
Garden lettuce educator packet
A cool-season leafy green eaten raw or lightly cooked - among the most fundamental garden vegetables. Bolts (sends up flower stalks) + turns bitter in heat above 70°F per NC State; cool-spring + cool-fall windows are the productive growing periods in most North American climates. Four habit groups: head (iceberg, crisphead), loose-leaf, romaine (cos), and butterhead (Bibb, Boston).
Scientific name
Lactuca sativa
Plant type
vegetable
Hardiness
Annual; NC State profile lists 2a-11b context
Light
full-sun, part-shade
Moisture
consistent
Spacing
8 inches
Classroom prompts
- Which plant traits are observations, and which are care recommendations?
- How would this plant fit change if the garden location moved warmer, colder, wetter, or drier?
- Which source-backed facts would you cite in a lesson handout?
Use the Sources & citations section below for page citation styles and the field-level source list.
Sources & citations
Cite this page
For lesson plans, articles, or research that uses this page. Use the source cards below to explore the references that informed this record.
Plotwright. (2026, May 17). Garden lettuce (Lactuca sativa). Retrieved 2026, August 20, from https://plotwright.com/plants/lactuca-sativa
Sources used for this record
This record is compiled from the sources below.







