Rumex acetosa) 35 days (baby), 50 days (mature) – Perennial in zones 4-9. French Lemon Sorrel is a must-have for no-hassle gardeners. Able to establish itself as a perennial in a wide range of Canada Sorrel is one of the earliest and latest greens in your garden coming up on its own at the beginning of spring. Each tender leaf is up to eight inches long and has a delicious lemon flavour. This is a great all-around open-pollinated sorrel variety, adaptable to any home organic vegetable garden.