perennialN. America Native

Bigleaf Lupine

Lupinus polyphyllus

The Story

Plant Bio

Lupinus polyphyllus, commonly known as the Bigleaf Lupine, features large palmate leaves and tall spikes of blue to purple flowers.

Known for its ability to fix nitrogen in the soil, improving fertility for adjacent plants.

Uses & Benefits:

Ornamental UsesLupinus polyphyllus offers striking spikes of colorful flowers that brighten gardens and attract pollinators.
Practical UsesProvides nitrogen fixation, enriching soil naturally.
Ecological BenefitsSupports bees, butterflies, and hummingbirds, fostering biodiversity.

Essentials

At a Glance

Plant Type

Perennial

Height

48 inches

Width

18 inches

Light

Full Sun, Partial Sun

Zones

4, 5, 6, 7, 8

Water

Moderate

Humidity

Average

Lifespan

Perennial

Native To

North America

Toxicity

All parts of the plant are poisonous if ingested

Planting

How to Grow

  1. Tuck seeds into well-draining soil in early spring for best germination.
  2. Mist cuttings lightly to maintain humidity during root development.
  3. Plant in full sun to encourage vibrant flowering and healthy growth.
  4. Water regularly but avoid waterlogging; keep soil moist.
  5. Apply balanced fertilizer during active growth for lush foliage.
  6. Mulch around plants to retain moisture and suppress weeds.

Pro Tip

Scarify seeds lightly to improve germination rates and ensure healthy seedlings.

Keep It Thriving

Care Guide

Do

  • Water deeply during dry spells to keep soil moist 🌱
  • Prune dead or damaged stems in late winter for better airflow
  • Fertilize with a low-nitrogen fertilizer in early spring

Don't

  • Avoid overwatering to prevent root rot ❌
  • Do not disturb roots when transplanting
  • Refrain from using heavy mulch that retains excessive moisture

Seasonal Care Calendar

TaskJanFebMarAprMayJunJulAugSepOctNovDec
Deadhead
Pest Check
Plant

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Brightly-colored perennial borderWildflower meadow accentSunny slope groundcover

Multiply

Propagation Methods

Good to Know

Common Questions

Bigleaf Lupine questions

What zones can Bigleaf Lupine grow in?

Bigleaf Lupine is hardy in USDA Zones 4–8. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Bigleaf Lupine deer resistant?

Yes — Bigleaf Lupine is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.

When does Bigleaf Lupine bloom?

Bigleaf Lupine typically blooms in late spring through early summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Bigleaf Lupine need full sun?

Bigleaf Lupine does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.

Keep exploring

Grow Bigleaf Lupine with confidence

See it in a design of your actual yard, get zone-matched care reminders, and track it season by season in your garden journal.