Prickly Lettuce Plant Care

Prickly Lettuce (Lactuca inermis) belongs to the Asteraceae family within the Lactuca genus. Prickly Lettuce is native to sub-Saharan Africa, Madagascar, and the Arabian peninsula. Prickly Lettuce is also known as Lactuca capensis.

Prickly Lettuce displays a compact rosette growth habit, reaching up to 2 ft tall with a spread of approximately 1 ft. Prickly Lettuce produces small yellow flowers in clusters.

Leaf size: approximately 6 inches.

Lactuca inermis requires watering every 7–10 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.

Prickly Lettuce thrives in full sun to partial shade.

Lactuca inermis grows best at temperatures of 60–75°F. Prickly Lettuce prefers humidity levels of 50–70%. A pebble tray or humidifier helps maintain adequate moisture around the plant.

Well-draining, fertile loam with added compost. Good drainage is essential for Prickly Lettuce to prevent waterlogging, which leads to root rot and fungal issues.

Feed Prickly Lettuce every 2 months during the growing season (spring and summer) with a balanced fertilizer diluted to the strength on the label.

Pause feeding in autumn and winter, when growth slows, and never fertilize dry soil — water first.

The PlantoScan app can remind you when to water and when to fertilize each plant.

Repot every 1-2 years in early spring. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.

Prickly Lettuce can be propagated through seeds. Similar propagation techniques also apply to alpine lettuce plant care, which shares the same genus.

See all plants toxic to cats and plants toxic to dogs.

Prickly Lettuce is susceptible to aphids, slugs, snails. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.

Yellow leaves, brown tips or drooping? See common plant problems and how to fix them.

Prickly Lettuce grows outdoors in USDA Zone 9a – 11b. It survives winters down to planting zone 9a. Prickly Lettuce is native to sub-Saharan Africa, Madagascar, and the Arabian peninsula. In cooler regions, grow Prickly Lettuce as a houseplant or bring it indoors before the first frost.