Rhubarb (Rheum rhabarbarum) is a member of the buckwheat (Polygonaceae) plant family. This herbaceous perennial grows 2-3 feet tall with large, smooth, heart-shaped basal leaves. The plant grows from ...

While vegetable harvesting in the UK peaks later in the year, rhubarb - which is often thought to be a fruit - is actually ready much earlier, and most varieties can be picked from April or May.