1829 21 Aug. 2/5 On Sunday morning there was a frost, which on low situations blackened the potato-stems.
1949 E. V. Hardenburg ii. 16 The potato stem is roughly angular, with three to four sides.
1997 72 361/2 This glossary was quite helpful to someone like me, who is not familiar with farm terms like..‘haulm’ (potato stem).