Serradella (Ornithopus sativus) is an annual or short-lived perennial herb grown as a nitrogen-fixing green manure and weed-excluding ground cover. Inputs Full sun1 Semi-shade1 Moist soil1 Type Herb Annual Perennial Functions Nitrogen fixer1 Ground cover1 Footnotes Ornithopus sativus | Plants for a Future ↩ ↩2 ↩3 ↩4 ↩5