Aurora Blue Delphinium
Aurora Blue Delphinium
Midsize Classic-Blue Spires, Sturdy and Early
Aurora Blue Delphinium (Delphinium elatum 'Aurora Blue') delivers the quintessential blue delphinium spire on a sturdy, midsize plant that blooms early and reliably. Dense columns of clear blue flowers rise in early to midsummer, drawing hummingbirds and bees. Deer-resistant and dependably hardy, it's a classic cottage-garden vertical accent for sunny and part-shade borders in Edina, Woodbury, and Maple Grove.
Aurora Blue Delphinium Plant Details
| Attribute | Detail |
|---|---|
| Botanical Name | Delphinium elatum 'Aurora Blue' |
| Mature Size | 24–30 in. tall, 16–20 in. wide |
| Hardiness Zone | 3–7 (Twin Cities is zone 4b–5a — fully hardy) |
| Light | Full sun to part shade |
| Bloom Time | Early to midsummer, often reblooming if cut back |
| Flower Color | Clear classic blue |
| Soil | Moist, rich, well-drained; amend clay with compost |
| Winter Hardiness | Reliable to -30°F once established |
| Deer Resistance | Rarely browsed — foliage is unpalatable to deer |
Landscape Uses in Minnesota
Midsize vertical accents: Classic blue spires add cottage-garden height to the middle of the border with minimal staking. Space 16–20 inches apart.
Pollinator and cut-flower gardens: Hummingbirds and bees love the blooms, and the spires are lovely cut. Pair with roses, peonies, and Shasta daisies.
Best Time to Plant in Minnesota
Plant in spring (late April–May) or early fall into rich, moist soil. Water through establishment.
How to Plant Aurora Blue Delphinium
Dig a hole twice the pot's width at the same depth, mixing in compost. Set the crown level, backfill, water well, and mulch 2 inches deep, keeping mulch off the crown. Space 16–20 inches apart. A light support helps in windy spots.
Watering Aurora Blue Delphinium
First year: Keep evenly moist — water every 2–3 days at first, then weekly. Stop 2–3 weeks before the ground freezes.
After year one: Prefers steady moisture and rich soil; cut spent spires to the base to encourage a second flush.
Q: Does it need staking?
Less than tall types — its midsize, sturdy spires usually stand on their own, with a light support in windy sites.
Q: Is delphinium poisonous?
Yes — all parts are toxic if eaten. Plant it away from where children or pets might nibble, and wash hands after handling.
Q: Will it survive a Minnesota winter?
Yes — hardy to zone 3 with good drainage over winter.
Q: Is it deer-resistant?
Yes — deer rarely browse delphinium foliage.
You May Also Like
Aurora Lavender Delphinium: A soft lavender from the same midsize series.
Peony (Paeonia): A timeless companion for the early-summer border.
Shasta Daisy (Leucanthemum): A white-daisy classic cottage-garden partner.