Dahlias are prized for their diverse forms and vibrant colors. Among these, ‘Skyfall’ Dahlia stands out for its striking appearance and generous blooms.
Characteristics of Skyfall Dahlia
‘Skyfall’ Dahlia features a collarette flower form, with an outer ring of petals and a contrasting inner “collar” around a central disc. The blooms typically showcase cool-tone purple petals with hints of plum, often fading to violet-pink on their outer edges. A distinctive gold and burgundy tiara of stamens creates a striking dark center, attracting pollinators like bees and butterflies.
These elegant flowers measure approximately 8-10 cm (3-4 inches) in diameter. The plant typically reaches a height of 0.5 to 1 meter (approximately 20 to 40 inches). ‘Skyfall’ Dahlia blooms repeatedly from summer until the first frost, offering a long season of color.
Growing Skyfall Dahlia
Site Selection and Soil
Choose a location that receives full sun, ideally eight+ hours of direct sunlight. While dahlias can tolerate partial shade, abundant blooming is best achieved in full sun. The soil should be fertile, humus-rich, and well-draining, as poor drainage can lead to tuber rot. An ideal soil pH for dahlias is slightly acidic, ranging from 6.5 to 7.0.
Planting Tubers
Plant ‘Skyfall’ Dahlia tubers outdoors in spring, after all danger of frost has passed and the soil temperature has warmed to at least 15°C (60°F). Prepare the planting area by loosening the soil to a depth of 30 cm (12 inches) and incorporating compost or organic matter. Dig a hole 4-6 inches deep, placing the tuber horizontally with the “eye” (the growth point) facing upwards, and then cover it with soil, ensuring no air pockets. Space tubers 30-45 cm (12-18 inches) apart.
Watering and Fertilizing
After planting, avoid watering the tubers immediately unless the soil is exceptionally dry, as too much moisture at this stage can cause rot before roots develop. Once sprouts emerge and plants are established, deep watering 2-3 times per week is beneficial, penetrating 8-10 inches to reach the roots. Dahlias are heavy feeders and benefit from a low-nitrogen fertilizer, rich in phosphorus and potassium, such as a 5-10-10 or 10-20-20. Apply fertilizer approximately 30 days after planting, and then repeat every 3-4 weeks throughout the growing season.
Staking and Deadheading
Given their height, ‘Skyfall’ Dahlias often benefit from staking to support their stems and heavy blooms, especially varieties growing over 3 feet tall. It is best to insert stakes, such as bamboo canes or metal rods, at planting time to avoid damaging the tubers later. As the plant grows, tie the stems to the support every 12-18 inches. Regular deadheading is important to encourage continuous blooming and prevent the plant from diverting energy into seed production. Cut spent flowers back to the next set of leaves or a developing bud to promote new growth.
Overwintering Skyfall Dahlia Tubers
In colder climates where ground temperatures fall below freezing (USDA Zones 3-7), ‘Skyfall’ Dahlia tubers are not winter hardy and must be dug up and stored indoors. After the first hard frost blackens the foliage, cut stems back to a few inches above ground level. Carefully dig up the tubers and remove excess soil.
Allow the tubers to dry for several days in a cool, dark, frost-free location with good air circulation to cure and prevent rot. Once dry, store them in a well-ventilated container, such as a cardboard box, plastic bin, or milk crate, layered with peat moss, vermiculite, or wood shavings. The ideal storage temperature is between 4.4°C and 10°C (40°F-50°F). Periodically check stored tubers for signs of rot or shriveling throughout the winter.
Common Pests and Diseases
‘Skyfall’ Dahlias can encounter pests and diseases. Common insect pests include aphids, spider mites, slugs, and earwigs. Aphids and spider mites are sap-sucking insects that can cause distorted or yellowed foliage, while slugs and snails are most destructive to young, tender growth. Regular inspection of plants helps in early detection and management.
Fungal issues like powdery mildew and botrytis blight (gray mold) can also affect dahlias. Powdery mildew appears as a white, powdery coating on leaves in dry conditions, while botrytis causes brown, rotting spots in wet weather. Maintaining good air circulation around plants and avoiding overhead watering can help reduce the risk of fungal diseases. Removing affected plant parts promptly can prevent further spread.