Blue Squill (Scilla siberica) are beautiful flowering bulbs that bloom in the spring with deep blue bell to bowl-shaped flowers. It can grow to 5 to 7-inch-tall. Blue Squill blooms appear in clusters of four or five. Not all cultivars of Blue Squill are blue. Alba is a cultivar that blooms with white flowers. Spring Beauty is a robust cultivar with dark blue blooms that grow to be 8 inches tall.
Blue Squill Infographic
Blue Squill Basics
| Name | Blue Squill |
| Botanical Name | Scilla siberica |
| Flower Color | Blue |
| Height | 5-7 inches |
| Sun | Full or Part |
| Soil | Well drained |
| Bloom Time | Spring |
| Zone | Zones 4 to 8 |
| Plant Depth | 3 inches |
| Plant Spacing | 2 inches apart |
| Density | 15-16 per sq. ft. |
Blue Squill: Other Names
Blue Squill is also called Siberian Squill and Spring Squill.
Blue Squill: Size
Blue Squill can grow to 5-7 inches tall.
Are Blue Squills Deer Resistant?
Blue Squills are deer resistant.
Where to Plant Blue Squill Bulbs
Plant Blue Squills in a location with well-drained soil. The best is to plant them in a full sun location. If planted under deciduous trees where there is partial to full shade, make sure the plant receives full sun in the spring. Sunlight is critical when your Blue Squill is actively growing.
| Sun | Full or Part Sun |
| Soil | Well drained Soil |
How to Plant Blue Squill (Scilla siberica)
Plant the Blue Squill bulbs in the fall, 3 to 4 inches deep in the ground and 2 inches apart. Plant them in drifts for the maximum impact; if you just plant one or two here and there, they’ll get lost in the spring garden. While planted in clusters of 20 to 50 bulbs or more, your Blue Squills will look spectacular.
How Many Blue Squill Bulbs to Plant in a Flower Bed?
You can plant 15-16 per sq. ft. Blue Squill bulbs per square foot. Use the Blue Squill Bulb calculator below to calculate how many bulbs you need for your garden.
How to Propagate Scilla siberica
Blue Squills freely produce offsets and also self-sow. They’re great for naturalizing, and if left alone, they’ll grow into enormous, showy colonies. In early summer, divide the Blue Squill clumps and separate the offsets and seedlings by digging and dividing the clumps.
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