Rumex acetosa : This hardy perennial herb has a desirably sharp and lemony flavor that enlivens salads, soups, sauces, dips, potatoes, and egg dishes. High in vitamins A and C, sorrel is particularly worthwhile to grow rather than buy at the market because its flavor does not survive well once harvested. Full sun to part shade; rich moist soil. .5 gm./pkt., approx. 450 seeds.