-
CATEGORY ::
- All Seeds /
- All Ground Cover Seeds /
- All Verbena Seeds
Verbena Seeds - Hoary Vervain
SEASON
Perennial
USDA ZONES
3 - 9
HEIGHT
24 - 36 inches
BLOOM SEASON
Summer
BLOOM COLOR
Purple
GROWTH RATE
Medium
ENVIRONMENT
Full sun
SOIL TYPE
Clay, sand, or gravel, pH 5.8 - 7.2
DEER RESISTANT
Yes
FOLIAGE COLOR
Whitish-green
About...
Verbena (Verbena Stricta) - Known as Hoary Vervain, this is another perennial that is grown from Verbena seeds. Hoary Vervain grows in narrow upright clumps 24 - 36 inches tall with showy flowers that are densely packed on narrow pencil-like spikes. The Hoary Vervain flowers bloom from the bottom of the spike up and are a violet blue color.MORE VERBENA OPTIONS
Planting Directions
TEMPERATURE
70F
AVERAGE GERM TIME
10 - 25 days
LIGHT REQUIRED
No
DEPTH
Surface sow no more than 1/8 inch
SOWING RATE
1 ounce per 600 square feet
MOISTURE
Keep seeds moist until germination
PLANT SPACING
12 - 24 inches
CARE & MAINTENANCE
Verbena...less
Verbena (Verbena Stricta) - Known as Hoary Vervain, this is another perennial that is grown from Verbena seeds. Hoary Vervain grows in narrow upright clumps 24 - 36 inches tall with showy flowers that are densely packed on narrow pencil-like spikes. The Hoary Vervain flowers bloom from the bottom of the spike up and are a violet blue color. The stems and leaves are heavily covered with long white hairs giving the foliage a whitish-green appearance. The leaves are up to 4 inches long and 2 1/2 inches across. Hoary Verbena makes an excellent cut flower, and butterflies use the foliage for their larva.
The Hoary Vervain plant grows best in full sun and average to dry conditions. It will flourish in poor soil consisting of clay, sand, or gravel. It will also grow well in rich loamy soil, but will often be out-competed by other plants. Drought resistance is good, although some of the lower leaves may shrivel and fall off the plant if enough water is not received.
Verbena seeds can be sown directly outdoors into prepared seedbeds. Late fall sowing is recommended as the Hoary Vervain flower seeds respond well to cold temperatures. If Hoary Vervain seeds are planted in the spring, a cold treatment needs to be done before planting. Dampen a paper towel, spread the flower seeds on the towel and carefully roll the towel up. Place the damp towel with the seeds in a ziploc bag and seal it. Place the bag with Verbena seeds into the refrigerator for 4 weeks. After the cold treatment, Hoary Vervain seed can be started in the spring or even indoors.
Approximately 33,000 seeds per ounce.
Common Questions
How long do verbena plants live?
When cultivated as perennials, verbenas typically have a short lifespan, often lasting only two to three years. However, if you are growing a species type instead of a hybrid, these plants can self-seed freely, potentially establishing themselves in such a way that they seem to thrive indefinitely.
How is this plant used in landscaping?
Verbenas thrive in sunny conditions and make excellent companion plants for other sun-loving varieties such as coneflowers, coreopsis, lamb's ear, phlox, and petunias. Hybrid annual verbenas are known for their consistent blooming and are often used in pots or as bedding plants in gardens. They can be planted in groups or positioned as front-edging plants, where their sprawling nature is particularly advantageous. Many hybrids exhibit a trailing growth habit, making them ideal for hanging baskets, rock gardens, or gracefully cascading over short retaining walls. Some varieties spread out, effectively covering ground in sunny locations.
My plants are getting leggy, what do I do?
When verbenas become leggy and sparse, it may indicate that the plant is reaching out for more light. Ensure that the plant gets a minimum of six hours of sunlight daily. If sunlight isn't the problem, consider pruning it back significantly and providing nourishment. This combination of pruning and feeding should encourage robust new growth and an abundance of blooms.
How can I encourage more blooms?
Deadhead your spent flowers to encourage a longer bloom season.
Can I grow in containers?
Verbena is often seen in hanging baskets combined with various flowers, serving as excellent "spillers" that cascade over the edges of the container. For container planting, any general-purpose potting mix can be used in well-draining containers of any material. Additionally, if verbena is growing in the ground, you can pot it up for indoor overwintering. Typically grown as annuals, potted verbenas generally do not need repotting and should be discarded at the end of the growing season. Perennial verbenas have a relatively short lifespan of two to three growing seasons and are not ideal as permanent houseplants. However, potted verbenas can be classified as warm-climate perennials, allowing you to bring them indoors to continue growing during winter. If you choose to move them inside, trim them back by one-third before the transition and place them in a spot that receives ample sunlight.