Delphinium in Zone 5b

Delphinium elatum

Method: Buy as a start โ€” Buy as a nursery start and transplant outside โ€” Delphinium is slow or unreliable from seed, so most gardeners skip seed-starting it entirely.

Start indoorsNot started from seed โ€” buy as a nursery start
Direct sow / transplant outsideMay 31โ€“Jun 7
Estimated bloom~150 days after transplanting

Spacing: 1 per square foot (square-foot-gardening spacing).

Good companions

No standout companions recorded yet for Delphinium.

Where to buy delphinium starts

Delphinium is almost always bought as a nursery start rather than seeded โ€” check a local nursery or garden center; we haven't vetted online start/plant suppliers yet.

See it growing

Search YouTube for "growing delphinium" videos โ†’ (a live search, not a hand-picked video โ€” results vary and aren't vetted by us)

โ† Back to the full zone 5b calendar ยท Full companion planting guide ยท Plan your beds in the Garden Designer โ†’