Photo by Pain Chaud (CC BY-ND 2.0).

Scientific Name: Lactuca sativa

Common Name: Lettuce 'Black Seeded Simpson', Loose-leaf Lettuce 'Black Seeded Simpson'

Family: ASTERACEAE (Daisy)

Etymology

Lactuca: Milk (Reference To Sap)
sativa: Cultivated

Origin

Lactuca sativa is of Indian origin.  This particular variety was bred in the United States by Henderson Seed Company in 1875. 

Description

Black Seeded Simpson is a loose-leaf type lettuce with broad, frilly, tender leaves with a delicate, sweet taste.   This variety is an old heirloom favourite and still regarded by many as one of the best tasting lettuce varieties.

Uses

The leaves of this variety of lettuce are well suited for adding to sandwiches, eating straight from the plant or using as the base of a delicious salad.

Germination

Sow the seed of Black Seeded Simpson lettuce during March-September in subtropical areas, all year round in temperate regions or from September to February in cold regions.  Germinate will be inhibited by soil temperatures greater than 30 degrees Celsius, ideally the temperature of the soil should be kept between 15 and 20 degrees Celsius.  The seeds of lettuces require some sunlight to germinate so don't plant them any deeper than 4mm, firm down well after sowing and water regularly to prevent the seeds from drying out.  Leave about 30cm between plants to allow them to grow, thin them out to the healthiest seedlings if they have been sown more densely than this.

Cultivation

This cultivar grows quickly, only taking 7-10 weeks from the time the seed are sown until harvest time.  Plant a few new seed every week during the growing season to ensure continuous supply.  Easy to grow and very prolific.  Lettuces are heavy feeders, requiring rich, well drained soils.  Tolerant of heat as well as mild drought and frosts.  Avoid watering in the middle of the day.