Species

perennial

Explosion Speedwell

The Story

Plant Bio

Veronica x bicolor 'Explosion' is known for its striking blue flowers and attractive foliage. It forms a bushy mound and blooms profusely during the summer months.

This cultivar is particularly valued for its extended blooming period and resilience in various soil types.

Uses & Benefits:

Adds vibrant purple and bi-colored flowers to gardens, attracting pollinators and brightening borders.

Provides ground cover that suppresses weeds and stabilizes soil.

Supports bees and butterflies, promoting biodiversity.

SpeciesVeronica x bicolorBicolor Speedwell

Essentials

At a Glance

Plant Type

Perennial

Height

18 inches

Width

18 inches

Light

Full Sun, Partial Sun

Zones

4, 5, 6, 7, 8

Water

Average, drought-tolerant once established

Humidity

Average

Lifespan

Perennial

Native To

Europe and Asia

Toxicity

Non-toxic to humans and pets

Bloom period

Mid-summer – Late summer

In flower about 2 months of the year

Planting

How to Grow

Tuck seeds into moist soil in early spring for best germination.
Mist cuttings regularly to keep humidity high and roots healthy.
Plant in well-drained soil with partial sun for optimal growth.
Water consistently during the first growing season to establish roots.
Fertilize with a balanced, water-soluble fertilizer every 4-6 weeks.
Divide clumps in early spring or fall to propagate new plants.

Pro Tip

Use a well-draining soil mix and avoid overwatering to prevent root rot.

Keep It Thriving

Care Guide

Do

Water regularly to keep the soil moist but not soggy 🌱
Provide partial sun for healthy flowering
Apply balanced fertilizer every month during active growth
Mulch to retain soil moisture and suppress weeds

Don't

Avoid overwatering, which can cause root rot ❌
Do not prune during the flowering period to protect blooms
Avoid planting in full shade, which reduces flowering
Refrain from neglecting pest control measures

Seasonal Care Calendar

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

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Vivid flower borderColorful groundcoverAttractive container display

Companion Plants

SalviaLavender Coreopsis Echinacea Gaillardia

Multiply

Propagation Methods

Good to Know

Common Questions

Explosion Speedwell questions

What zones can Explosion Speedwell grow in?

Explosion 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 Explosion Speedwell deer resistant?

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

When does Explosion Speedwell bloom?

Explosion Speedwell typically blooms in mid-summer through late summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Explosion Speedwell need full sun?

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

Is Explosion Speedwell drought tolerant?

Yes — once established (usually after the first full season), Explosion Speedwell handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.