Dahlia Semi Cactus Striped Vulcan (Pack of 2)

Dahlia variabilis ‘Striped Vulcan’

The Dahlia Semi Cactus Striped Vulcan is a fiery and unforgettable addition to any summer or fall garden. With its brilliant red petals streaked in golden yellow, this stunning variety offers striking bi-color blooms and a semi-cactus form that adds dramatic texture and volume. It brings season-long color, structure, and vibrant energy to your landscape. These tall, showy flowers are as captivating in the garden as they are in a vase, making them a top choice for floral designers and home gardeners alike.

• USDA Zones: 8–10 (other zones must lift for the winter)
• Bloom Time: Summer–Fall
• Height: 46"
• Planting depth/Spacing: 2–4"/ 18"
• Deer Resistant: no

To learn more about the dahlias’ upkeep and maintenance, please visit our blogs and videos below.

Each bloom features flame-like petals in a vivid red-and-yellow pattern that commands attention in any garden bed. The tall, sturdy stems support the large blossoms throughout the season, providing months of color and visual interest. These blooms are also pollinator-friendly, attracting bees and butterflies while enhancing biodiversity in your garden space.

Key Characteristics and Benefits of Striped Vulcan Dahlias

• Striking Color Contrast: Bold bi-color petals with vivid red and golden yellow create maximum visual impact.
• Long Bloom Season: Enjoy flowers from midsummer through the first frost.
• Pollinator Attraction: Supports local ecosystems by inviting beneficial insects.
• Ideal for Cutting Gardens: Long-lasting blooms with upright stems for bouquets and arrangements.
• Unique Petal Form: Semi-cactus petals deliver dynamic shape and texture.

Growing Dahlia Striped Vulcan Tubers

Choose a sunny site with rich, well-draining soil. Plant tubers 2–4 inches deep and 18 inches apart. Water thoroughly after planting, then regularly throughout the season. Taller dahlias benefit from staking to support their heavy flower heads. Deadhead spent blooms to extend the flowering season and encourage continual blooming.

Climate and Soil Requirements

Grow in USDA Zones 8–10. In colder zones, lift and store tubers after the first frost. Dahlias thrive in nutrient-rich, well-drained soils amended with compost or organic fertilizer.

Sunlight and Watering

Full sun is crucial for healthy growth and bloom production. Water consistently, keeping soil moist but never soggy. Mulch can help conserve moisture and suppress weeds.

Care and Maintenance

Fertilize monthly with a low-nitrogen fertilizer to promote flowering. In zones outside 8–10, lift tubers after frost, dry them thoroughly, and store them in a cool, dry location until spring.

For more tips on caring for flower bulbs, explore our complete Flower Bulb Growing Guide .

Multiple Trusted Brands at Grow Organic

At Grow Organic, we offer the Dahlia Semi Cactus Striped Vulcan from a variety of trusted, high-quality suppliers. This ensures you can select the best tubers for your climate and planting preferences. Our diverse selection provides gardeners with greater flexibility, quality assurance, and dependable results every growing season.

Learn More About Growing Dahlias

Curious about planting and caring for dahlias? Visit our detailed guide on Growing Summer Blooming Flowers: Dahlias for expert tips, planting schedules, and storage advice.

Complete your summer garden with bold, pollinator-friendly blooms from our Pollinator Flower Collection.