Spiked Speedwell
Veronica spicataUSDA | Grow Zone
3-8Outdoors all year in zones 3 to 8. Anywhere colder, keep it as a houseplant. Protect it below 40°F.
- Light
- Full sun, 6 hours
- Water
- Top inch dry between waterings
- Humidity
- 40-60%
- Temperature
- 65-75°F (18-24°C)
- Difficulty
- Beginner
- Growth
- Moderate
- Mature size
- 2-3 ft tall, 1-2 ft wide
Veronica spicata, commonly known as Spiked Speedwell, is a stunning perennial native to Europe and Asia. Renowned for its vibrant spikes of blue flowers, it adds color to gardens and attracts pollinators, making it a favorite among gardeners.
Ask Vesper about Spiked Speedwell
Ideal temperature
65-75°F is where it grows fastest. Below 40°F cold damage starts.
Spacing and harvest
- Mature size
- 2-3 ft tall, 1-2 ft wide
- Plant apart
- 12-24 in
- Frost
- Hardy: survives frost
Everything it needs
9 essentials at a glance
Watering
Veronica spicata prefers well-drained soil and should be watered regularly, allowing the top inch of soil to dry out between waterings.
During the growing season, water once a week, increasing frequency during hot, dry spells. Signs of over-watering include yellowing leaves and root rot, while under-watering may cause wilting and browning leaf edges.
Light
This plant thrives in full sun, requiring at least 6 hours of direct sunlight daily.
It can tolerate partial shade but may not flower as profusely. Ideal placement includes sunny borders or rock gardens, where it can receive ample light throughout the day.
Soil
Veronica spicata prefers sandy or loamy soil with a pH range of 6.0 to 7.0.
Good drainage is essential to prevent root rot, so consider using a potting mix designed for perennials or adding sand to improve drainage.
Humidity
This plant prefers average humidity levels, around 40-60%.
To increase humidity, mist the plant or place a humidity tray nearby. Signs of humidity stress include leaf curling and browning tips.
Temperature
Veronica spicata thrives in temperatures between 65-75°F (18-24°C) and is hardy in USDA zones 3-8.
It can tolerate cold temperatures but may need protection in extreme heat, especially in zones 7-8.
Fertilizing
Use a balanced fertilizer with an NPK ratio of 10-10-10, applying it every 4-6 weeks during the growing season.
Reduce fertilization in the fall and winter. Signs of nutrient deficiency include stunted growth and pale leaves.
Pruning
Prune back spent flowers to encourage reblooming and maintain a tidy appearance.
Use sharp, clean pruning shears and remove dead or damaged stems in early spring. Deadheading can extend the flowering period.
Repotting
Repot Veronica spicata every 2-3 years or when it becomes root-bound.
Choose a pot that is 1-2 inches larger in diameter. Signs it needs repotting include roots growing out of the drainage holes and stunted growth. To repot, gently remove the plant, loosen the roots, and place it in fresh potting mix.
Propagation
Propagation can be achieved through division or seeds.
For division, carefully dig up the plant in early spring or fall, separating the root clumps and replanting them. For seeds, sow them in spring after the last frost, covering lightly with soil and keeping them moist until germination.
When it's unhappy
Yellow leaves
Why it happens
This can be caused by over-watering or nutrient deficiency.
How to fix it
Ensure proper drainage and adjust watering frequency. Consider fertilizing if nutrient deficiency is suspected.
Root rot
Why it happens
Root rot is typically caused by overly wet soil conditions.
How to fix it
Improve drainage and reduce watering frequency. Remove affected roots and replant in fresh soil.
Wilting
Why it happens
Wilting may indicate under-watering or extreme heat.
How to fix it
Check soil moisture and water thoroughly if dry. Provide shade during peak heat if necessary.
Powdery mildew
Why it happens
High humidity and poor air circulation can lead to powdery mildew.
How to fix it
Ensure good air circulation and avoid overhead watering. Treat with fungicide if necessary.
Poor flowering
Why it happens
Insufficient sunlight or nutrient deficiency can lead to reduced blooms.
How to fix it
Ensure the plant receives full sun and consider fertilizing to boost flower production.
Care through the year
Spring
In spring, prune back any dead stems and prepare the soil for new growth. Fertilize with a balanced fertilizer to encourage robust flowering.
Summer
During summer, ensure consistent watering, especially in dry spells. Deadhead spent flowers to promote continuous blooming.
Fall
In fall, cut back the foliage after the first frost to tidy up the garden. Consider mulching to protect the roots during winter.
Winter
In winter, protect the plant from extreme cold by applying mulch around the base. Avoid excessive moisture to prevent root rot.
Toxicity & Safety
Veronica spicata is non-toxic to pets and children. It poses no significant health risks if ingested, making it a safe choice for gardens.
Good to know
How often should I water my Spiked Speedwell?
Water Veronica spicata once a week, allowing the top inch of soil to dry out between waterings. Increase frequency during hot, dry spells.
What type of soil is best for Veronica spicata?
This plant prefers sandy or loamy soil with good drainage and a pH of 6.0 to 7.0. A well-draining potting mix is ideal.
When is the best time to prune Spiked Speedwell?
Prune Veronica spicata in early spring to remove dead or damaged stems and to encourage new growth. Deadheading spent flowers can also promote reblooming.
Can I grow Veronica spicata in partial shade?
While Veronica spicata prefers full sun, it can tolerate partial shade. However, flowering may be less abundant in shadier conditions.
What are the signs of nutrient deficiency in Spiked Speedwell?
Signs include stunted growth and pale leaves. If you notice these symptoms, consider applying a balanced fertilizer.
How do I propagate Veronica spicata?
You can propagate this plant through division in spring or fall or by sowing seeds in spring. For division, separate root clumps and replant.
Is Veronica spicata toxic to pets?
No, Veronica spicata is non-toxic to both pets and children, making it a safe choice for gardens.
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