If you love a crisp, refreshing lettuce, this RHS award-winning Cos Crisp Mint Lettuce is an excellent variety to grow in your garden. A perfect example of a classic cos, also known as romaine, these heirloom vegetable seeds develop dense, good-sized heads of crisp and succulent leaves. The large, mint-green, slightly ruffled outer leaves and crystal-white heart have a mild, sweet flavour that is delicious in fresh salads and sandwiches.

Adaptable to a variety of soils and conditions, Cos Crisp Mint lettuce is heat-tolerant and well-suited to Australian gardens. The sturdy crops are bitter-free and stand well when mature. Its reliability and good performance for home gardeners have earned this variety the prestigious RHS Award of Garden Merit.

How to Sow Seeds

Method: Sow Cos Crisp Mint lettuce seeds 3mm (1/8in) deep in small clumps, covering them with a fine layer of soil or compost.
Thinning: Once the seedlings are established, thin them out to the strongest plants, spacing them 30cm (12in) apart in all directions.
Growing notes: Firm them down gently and keep the soil moist as they grow. Lettuce seedlings typically appear within 10–14 days. Keep the soil moist and free of weeds as they grow. You can harvest the heads when mature or pick individual young leaves as and when you need them. You can also sow more seeds every two weeks for a continual harvest. See the lettuce growing guide for more top tips! Soil Type Compost, fertile.

Growing Needs

Soil: Fertile soil
Water: Firm them down gently and keep the soil moist as they grow

Plant Characteristics

Harvest: You can harvest the heads when mature or pick individual young leaves as and when you need them
Uses: The large, mint-green, slightly ruffled outer leaves and crystal-white heart have a mild, sweet flavour that is delicious in fresh salads and sandwiches