Greenhouse is American guitarist Leo Kottke's fifth album, his second on the Capitol label, released in 1972. It was recorded in three days. From the liner notes: "In the sense that my guitars were once plants, this record's a greenhouse.” There are seven instrumentals and four vocals. It reached No. 127 on the Billboard 200 chart.
Writing for Allmusic, music critic Bruce Eder noted that the album was less ambitious that Kottke's previous release and wrote of the album "... Greenhouse is a true solo record that offers several surprises. Over a third of it is made up of vocal numbers, including two that are absolutely superb... Some of the mastering isn't quite as clean here as it is on other titles in Kottke's catalog, but otherwise this is an acceptable reissue of an album that is, perhaps, under appreciated because of its relatively high concentration of vocal numbers by the guitarist."