Aim to sow
0.49 inches (1.25 cm) deep and try to ensure a gap of at least
5.85 inches (15.0 cm). Soil temperature should be kept higher than
5°C / 41°F to ensure good germination.
By our calculations, you should look at sowing Heirloom Valentine about 53 days before your last frost date.
As Heirloom Valentine is tender, ensure temperatures are mild enough to plant out - wait until after your last frost date to be on the safe side.
Rare historic Heirloom lettuce. A red romaine type with savoyed leaves and upright habit. Also has some bolt resistance, originally from Spain
Sweet Valentine, San Valentin