Botanical profile

Verbena hastae

Latin name
Blue Vervain
Common name
Verbena hastae
Type
Native herbaceous perennial
Family
Verbenaceae

Blue vervain is a slender, native perennial appreciated for its long, purplish-blue flower spikes that bring a natural, vertical, and airy touch to the garden. It integrates very well into perennial beds, pollinator gardens, naturalized landscapes, wetlands, and meadow-style settings. Its delicate bloom attracts attention without being too overwhelming, making it an excellent plant for adding movement, height, and a beautiful rustic presence to outdoor spaces.

Easy to grow, blue vervain prefers a sunny to slightly partly shaded location, in cool to moist, rich, and well-drained soil. It tolerates humidity better than many other full-sun perennials, making it interesting for rain gardens, banks, landscaped ditches, or areas where the soil retains some moisture. Once well established, it forms a robust and durable plant, capable of returning year after year with little maintenance.

Highly appreciated by bees, butterflies, and other pollinators, blue vervain is ideal for creating a vibrant, ecological, and biodiverse garden. Its flower spikes pair beautifully with monardas, eupatoriums, echinaceas, grasses, rudbeckias, and other natural-style perennials. It is an excellent plant for gardeners looking for a hardy, floriferous, native perennial perfect for enriching naturalized landscapes or wildlife-friendly gardens.

Care guide

Care level
Easy

Choosing this plant

Main benefit
Very graphic purple flower spikes that are excellent for pollinators
Pollinator garden, wildflower meadow, natural bed, cool border, native garden
Container growing
Container culture possible in a large, well-drained pot
Seasonal care
Cut back faded flowers to limit self-seeding; prune dry stems in autumn or spring; divide as needed
Growing conditions

Light, soil, water and hardiness

Hardiness zone
Zone 3
Exposure
Sun to partial shade
Watering
Regular; keep soil moist but not soggy
Humidity
Average to high humidity; prefers cool soil
Fertilization
Light compost in spring; moderate fertilization in poor soil
Soil type
Medium to fertile, fresh to moist, well-drained soil
Soil pH
Slightly acidic to neutral
Minimum temperature
-30°C
Propagation method
Sowing or division
Plant appearance

Blooming, foliage and shape

Blooming period
Summer to early autumn
Flower color
Violet to purplish blue
Fruiting
Late-season seeds
Foliage color
Green
Foliage type
Obsolete
Shape
Habit upright in a branched tuft
Garden structure

Size and growth

Height
60 to 150 cm (24 to 60 inches)
Width
45 to 60 cm (18 to 24 inches)
Growth rate
Average growth
Vegetable garden and yield

Companion planting, spacing and harvest

Companion plants
Bee balm, coneflowers, black-eyed Susans, ornamental grasses
Spacing
30 to 45 cm (12 to 18 inches)
Not recommended for pets
Not recommended for pets

Pets

Butterflies
Plants that attract butterflies

Butterflies

Deer
Less attractive or generally tolerated by deer

Deer

The availability of our plants varies depending on arrivals, seasons, nursery production and supplier availability. Some varieties may be offered for a limited time only, depending on their natural cycle or current stock. These plant profiles are designed to guide and inspire you when choosing plants for the garden, landscaping projects, containers or long-lasting outdoor arrangements.