Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
hŏlĕro (ŏlĕro), āvi, ātum, 1, v. a. [holus], to plant with vegetables: hortulos, Matt. ap. Prisc. p. 722 P.: holeratus, holeribus consitus, Not. Tir. p. 168.