Compass Plant

Botanical Name: Silphium laciniatum

Height: about 2 m

Season of bloom: August and September

Growing Conditions: Full sun. Well-drained soil. Extraordinarily deeply tap-rooted and so difficult to grow in pots.

Wildlife benefits:

From Ottawa Valley or eastern Ontario sources: No. Species occurs in the wild in southwestern Ontario where it is considered provincially rare.

Remarks: Long-lived, slow to mature, and majestic.

Similar species: Prairie Dock, Cup Plant.

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Compass Plant in Tall Grass Prairie remnant near London, Ontario