13 January 2018 Squill (Scilla bifolia, Scilla siberica) Squills (Scilla siberica). Photo: Martenatuin (Franeker). Both types of Squills have blue-coloured flowers. These plants can grow wild in a stinzen environment and have been introduced much more recent than the other Stinzenplants. Martenatuin, Philippusfenne and St. Vitus churchyard Stiens are interesting places to see the Squills.