A smattering of frost-hardy minerβs lettuce (πΆπππ¦π‘ππππ πππππππππ‘π) self-seeded in my cold frame this Winter.β Rich in vitamin C, its succulent and tasty heart-shaped leafs make a perfect topping to any salad. It is a green best enjoyed in the late Fall or early Spring as it bolts and becomes bitter when warm weather emerges. Itβs growth tells me that it is time to start new seeds and seedlings in the cold frame.