RHS Lettuce Crisp Mint Seeds produce a classic heirloom Cos, also known as Romaine lettuce, prized for its crisp texture, sweet flavour and reliable performance. This variety forms dense, well sized heads with attractive mint green leaves and a clean, pale heart, making it a favourite for fresh salads and everyday use.

The leaves are crisp and succulent with a mild, refreshing taste that stays free from bitterness, even as plants mature. Crisp Mint is known for standing well in the ground and producing consistent crops, making it ideal for successional sowing throughout the growing season.

This adaptable lettuce performs well across a wide range of soil types and garden conditions. It is particularly valued for its tolerance to warmer weather compared with many other lettuces, helping extend the harvesting window from late spring through to autumn.

Awarded the prestigious RHS Award of Garden Merit, Lettuce Crisp Mint has been recognised for its reliability, productivity and eating quality. It is an excellent choice for allotments, kitchen gardens and raised beds, whether you are new to growing lettuce or an experienced gardener.

Part of the trusted seed range produced by Mr Fothergill’s Seeds in partnership with the Royal Horticultural Society, these seeds are packed in the UK and meet strict quality standards.

Standard Shipping (UK)
Free on orders £65; £3.95 under £65
Estimated 2–4 business days*

Next-Day Shipping (UK)
£5.95 for next business day†

*Orders before 12 pm GMT. Weekends & holidays ship next working day.
†Order by 12 pm GMT; weekends & holidays ship next working day.

During Peak Period, these timelines may be affect by up to 48 hours.

We have a 30-day return window, so if you don't love what you brought, you can return or exchange it for free.

Use our easy-to-use returns portal →

Items must be unused, unopened and in original packaging.

For more information, check out our return & refunds policy →