Species

Veronica longifoliaLong-leaved Speedwell

4 other cultivars

perennial

Blue Giant Speedwell

Veronica longifolia 'Blue Giant'

The Story

Plant Bio

Tall perennial with long, narrow leaves and tall spikes of blue flowers.

Notable for its robust size and vibrant blue flowers that attract pollinators.

Uses & Benefits:

Vibrant blue flowers add striking color to gardens and borders, attracting pollinators and enhancing visual appeal.

Provides ground cover and erosion control on slopes.

Supports pollinator populations, including bees and butterflies.

SpeciesVeronica longifoliaLong-leaved Speedwell

Essentials

At a Glance

Plant Type

Perennial

Height

40 inches

Width

30 inches

Light

Full Sun, Partial Sun

Zones

4, 5, 6, 7, 8

Water

Moderate

Humidity

Average

Lifespan

Perennial

Native To

Europe

Toxicity

Non-toxic to humans and pets

Bloom period

Summer – Early summer

In flower about 12 months of the year

Planting

How to Grow

Tuck seeds into well-draining soil in early spring for best germination.
Mist cuttings regularly to maintain humidity and promote root growth.
Transplant young plants after the last frost for optimal establishment.
Mulch around plants to retain moisture and suppress weeds.
Fertilize monthly during the growing season with a balanced fertilizer.
Prune lightly after flowering to encourage bushy growth.

Pro Tip

Ensure well-draining soil and avoid overwatering to prevent root rot.

Keep It Thriving

Care Guide

Do

Water consistently, keeping soil moist but not soggy 🌱
Provide full sun for vigorous growth
Prune after flowering to shape the plant

Don't

Avoid overwatering to prevent root rot ❌
Do not neglect pruning, which encourages healthy blooms
Steer clear of planting in poorly drained soil

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Deadhead
Divide
Fertilize
Plant
Spring Cleanup

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Colorful border with vibrant blue flowersWildflower meadow accentRock garden centerpiece

Companion Plants

SalviaLavender Coreopsis Echinacea Gaillardia

Multiply

Propagation Methods

Good to Know

Common Questions

Blue Giant Speedwell questions

What zones can Blue Giant Speedwell grow in?

Blue Giant Speedwell 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 Blue Giant Speedwell deer resistant?

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

When does Blue Giant Speedwell bloom?

Blue Giant Speedwell typically blooms in summer through early summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Blue Giant Speedwell need full sun?

Blue Giant Speedwell does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.