Black Seeded Simpson Lettuce (Lactuca sativa ‘Black Seeded Simpson’)

Black Seeded Simpson Lettuce (Lactuca sativa ‘Black Seeded Simpson’)

Black Seeded Simpson Lettuce (Lactuca sativa 'Black Seeded Simpson') is a classic heirloom leaf lettuce that has been a favourite among home gardeners for generations. Renowned for its fast growth, tender texture, and sweet, mild flavour, this reliable variety produces large, loose heads of beautifully frilled, lime-green leaves that can be harvested over an extended season. Its exceptional productivity and ability to regrow after harvesting make it one of the best lettuces for continuous fresh salads throughout the growing season.

The crisp, delicate leaves are ideal for salads, sandwiches, wraps, burgers, tacos, and fresh garnishes. Unlike head lettuce, Black Seeded Simpson can be harvested leaf by leaf, allowing the plant to continue producing fresh foliage for weeks. It performs especially well during the cool temperatures of spring and fall, producing the sweetest, most tender leaves before the heat of summer arrives.

Black Seeded Simpson Lettuce performs beautifully in vegetable gardens, raised beds, cold frames, greenhouse beds, and patio containers. Its compact growth also makes it an excellent choice for succession planting and small-space edible gardens, providing repeated harvests throughout Alberta's growing season.

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Sun Requirements ▾

Full sun to partial sun. Plant where it receives at least 4–6 hours of direct sunlight daily. In Alberta, light afternoon shade during the hottest part of summer helps extend the harvest season and keeps leaves tender.

Watering Instructions ▾

Moderate. Keep the soil consistently moist but not saturated. Regular watering encourages tender, crisp leaves and helps prevent bitterness or premature bolting during warm weather.

Care Tips ▾

Harvest outer leaves regularly when they reach usable size to encourage continual new growth from the centre of the plant. Sow or plant successively every few weeks for an ongoing harvest throughout the season. Apply mulch to help maintain cool, evenly moist soil and reduce bolting during warmer weather. A moisture meter is a great way to gauge your plant's moisture levels.
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