Scilla siberica - Siberian Squill These tiny plants don't get much taller than about 4 to 8 inches (10 to 20 cm), but they make up for their minature size by spreading out and blooming profusely. Scilla siberica is a dainty spring bulb with sword like leaves and bright blue pendant flowers that will naturlise freely. Scilla siberica are equally happy growing under a tree, at the edge of a woodland, or scattered throughout a rock garden. Site: Best grown in a sheltered spotPosition: Sun or part shadeSoil: Well-drained soilPlanting Period: August to NovemberFlowering Period: March to AprilPlanting: Depth 3 ” ( 8 cm), Spacing 3” (8 cm)Height: 8'' (20cm)