 Several species are considered by the IUCN as endangered ("T. epipactoides") or critically endangered ("T. gregaria", "T. hiemalis" and "T. × mackibbinii").Thelymitras can be grown in a freely draining, dense mixture with partially composted organic matter.A suitable mixture is an equal mix of 7 mm road screenings, year old composted wood chips and commercial potting mix.