Speedwell
Veronica longifolia
outdoorverifiedReviewed by the GreenScout Team
An upright perennial producing tall spires of small, densely packed flowers in blue, purple, pink, or white from mid-summer to fall. Veronica longifolia has attractive linear foliage and is an excellent choice for cut flowers and vertical interest in borders. It is a reliable, long-blooming plant that attracts pollinators and requires minimal maintenance once established.
Common Problems
Select the problem your Speedwell is experiencing to get a treatment guide.
Care Guide
light_mode
Light
Full sun; requires minimum 6 hours of direct sunlight for optimal flowering and compact growth
water_drop
Water
Moderate; prefers evenly moist soil during growing season but tolerates some drought once established; avoid waterlogging which causes root issues
compost
Soil
Well-draining soil; adaptable to various soil types including sandy, loamy, and clay soils; prefers neutral to slightly alkaline pH
science
Fertiliser
Light feeding in spring with balanced fertilizer; avoid excessive nitrogen which causes leggy growth and reduces flowering
thermometer
Temperature
Hardy and cold-tolerant; performs well in cool to warm temperate regions; avoid hot, humid climates which reduce vigor
humidity_percentage
Humidity
Moderate; tolerates dry air; benefits from good air circulation to prevent disease
Toxicity
check_circleSafe for Catscheck_circleSafe for Dogscheck_circleSafe for Children
Non-toxic to humans and pets; safe for all household members
Common Diseases
Common Pests
Seasonal Care
local_floristspring
Resume regular watering and feeding as growth picks up.
light_modesummer
Peak growing season. Water and feed regularly.
ecoautumn
Reduce watering as growth slows. Stop heavy feeding.
ac_unitwinter
Minimal watering and feeding. Protect from frost if needed.
More from GreenScout
assignmentwater_dropmapcomparedangerousarticle
Get a personalised care plan
AI-generated for your plant
Watering calculator
How often should you water?
Find your USDA zone
Check if this plant suits your climate
Compare this plant
Side-by-side with similar species
Toxicity guide
Safe for pets and children?
Plant care articles
Expert guides and how-tos