The ‘Veerle’ dahlia is a beloved cultivar, known for its captivating blooms that enhance any garden space. Understanding its specific needs ensures a successful growing experience.
Characteristics of ‘Veerle’ Dahlia
The ‘Veerle’ dahlia features charming, ball-shaped blooms, typically in shades of pink, from bright to dark blue-pink, with some variations showing raspberry pink or a mix of white and purple. Flowers generally range from 7 to 8.5 centimeters in diameter, classifying them as medium-sized, though some sources indicate up to 10 centimeters. Its inflorescence forms a capitulum, or head.
This dahlia variety has dark green foliage, which provides a striking contrast against the vibrant flower colors. The petals often have a consistent, unicolored distribution, though some may show geometric gold centers or bicolored traces. ‘Veerle’ is classified as a double or pleniflorous type, belonging to the Ball Group of dahlias.
Plants typically reach a height of 70 to 100 centimeters, though some variations are 50 to 60 centimeters. It is a productive variety, continuously producing a mass of blooms throughout the season. The flowering season for ‘Veerle’ dahlia generally spans from July to September, extending into October in some regions, providing vibrant color through summer and early autumn.
Cultivating ‘Veerle’ Dahlia
Site and Soil Preparation
‘Veerle’ dahlias thrive in locations with ample sunlight, ideally six to eight hours of direct sun daily, with morning sunlight being particularly beneficial. They also benefit from some protection from strong winds. The soil should be well-draining, rich in organic matter, and have a pH between 6.0 and 7.5.
Before planting, loosen the soil to a depth of at least 30 centimeters (12 inches) and incorporate a two to three-inch layer of compost or well-rotted manure. Adding an all-purpose granular fertilizer to the planting area can also support healthy development. Proper soil preparation ensures tubers can expand easily and prevents issues like root rot due to poor drainage.
Planting Instructions
‘Veerle’ dahlia tubers should be planted after the last spring frost, when soil temperature consistently reaches at least 15°C (60°F). Plant tubers 5 to 10 centimeters (2 to 4 inches) deep, with the “eye” or sprout facing upwards. For larger varieties, plant them 45 to 50 centimeters (18-20 inches) apart for proper growth and air circulation.
Water newly planted tubers well, then refrain from watering until green sprouts emerge. Overwatering at this stage can lead to tuber rot. Once sprouts are visible, regular watering can begin.
Watering and Feeding
Consistent moisture is important for ‘Veerle’ dahlias once they have sprouted and are actively growing. They require 2.5 to 5 centimeters (1-2 inches) of water per week, from rainfall or irrigation. During hot, dry periods, bi-weekly or daily watering may be necessary, especially for container-grown dahlias. Deep watering, reaching 15 to 25 centimeters (6-10 inches) into the soil, promotes strong root development. Avoid wetting foliage to reduce disease risk.
Dahlias benefit from regular feeding. Once plants are established (around eight weeks after planting or when 15 cm tall), use a low-nitrogen fertilizer higher in phosphorus and potassium, such as a 5-10-10 or 5-10-15 formulation. Regular, low-concentration feeding, such as a “weakly weekly” approach, can yield good results. Fertilizing every other week with a fish and seaweed formula is also an option once blooming begins.
Support and Deadheading
Taller ‘Veerle’ dahlia plants often require staking to support their stems and heavy blooms. Place stakes, typically 1.5 to 1.8 meters (5-6 feet) tall, near the tuber at planting time to avoid damaging the root system. As the plant grows, tie stems to the stake every 30 to 45 centimeters (12-18 inches) using twine or soft ties.
Deadheading spent blooms is important to encourage continuous flowering. Removing faded flowers redirects the plant’s energy from seed production to new blooms. Deadhead every few days during peak season by cutting the stem back to a leaf node, a new bud, or a side stem.
Overwintering ‘Veerle’ Dahlia
In colder climates (USDA Zones 3-7), ‘Veerle’ dahlia tubers are not hardy and must be dug up and stored indoors to protect them from freezing temperatures. In late fall, after the first hard frost blackens the foliage, cut stalks down to 5 to 10 centimeters (2-4 inches) above ground. Leave tubers in the ground for one to two weeks after frost to allow their skin to toughen, or “cure,” for storage.
Carefully lift tuber clumps from the soil with a fork, avoiding damage or bruising, which can lead to rot during storage. Gently remove excess soil. Allow clumps to air dry in a cool, protected location for a few days to a few weeks. Once dry, store tubers in a cool, dark, frost-free place where temperatures remain between 4°C and 10°C (40°F and 50°F). They can be stored in materials like peat moss, vermiculite, wood shavings, or even loosely in cardboard boxes or paper bags to ensure some air circulation while retaining moisture. Periodically check tubers throughout winter for any signs of shriveling or rot.
Troubleshooting Common ‘Veerle’ Dahlia Issues
Dahlias can encounter common issues such as pests and diseases. Aphids cluster on new growth, sucking plant sap and causing yellowing or distorted leaves; horticultural soaps or neem oil can manage infestations. Slugs and snails feed on young leaves, leaving irregular holes and slime trails; they can be deterred with barriers or traps.
Powdery mildew, a fungal disease, appears as a white coating on leaves, especially in warm, humid conditions. Good air circulation and avoiding overhead watering help prevent this. Non-blooming can occur if dahlias do not receive sufficient sunlight (at least six hours daily) or if soil temperatures are too low at planting. Provide adequate light and wait for warm soil temperatures before planting to mitigate this issue.