Dahlia 'Hillcrest Regal' Dahlia 'Hillcrest Regal' (Col)

Water

Dahlias, including 'Hillcrest Regal', generally require watering two to three times a week, although this can vary based on climate conditions. In hot, dry weather, they may need water every day, while in cooler, moist conditions, less frequent watering is necessary. Use enough water to moisten the soil to a depth of about 6-8 inches, which typically translates to approximately 1-2 gallons per plant, per watering depending on soil type and outdoor temperature. Avoid overhead watering to reduce the risk of fungal infections and water early in the day to allow foliage to dry.

Light

Dahlias, such as 'Hillcrest Regal', thrive in locations where they receive full sun for at least 6 to 8 hours a day. The best spot for planting dahlias is in a sunny garden bed with some protection from intense afternoon sun, which can be too strong and may damage the blooms. Ensure that the site is not shaded by larger plants or buildings to promote the best growth and flowering.

Temperature

Dahlias, such as 'Hillcrest Regal', prefer temperatures between 60 and 75 degrees Fahrenheit, which promote optimal growth and flowering. They can survive temperatures as low as approximately 50 degrees Fahrenheit but won't tolerate frost. Protect dahlias from extreme heat by providing some afternoon shade or mulch when temperatures exceed 75 degrees Fahrenheit.

Pruning

Dahlias, such as 'Hillcrest Regal', benefit from pruning to encourage bushier growth and more blooms. They should be pruned when they reach a height of 16 inches by pinching out the growing tip above the third set of leaves. Additionally, deadheading spent flowers regularly will promote continuous blooming. The best time for major pruning is in late winter or early spring, just before new growth begins.

Cleaning

As needed

Soil

Dahlias thrive in fertile, well-drained soil with a pH ranging from 6.5 to 7.0. A good mix for Dahlia 'Hillcrest Regal' would include loamy garden soil, compost, and peat moss or coir to ensure good drainage and fertility. Perlite or sand can also be added to enhance drainage.

Repotting

Dahlias, including Dahlia 'Hillcrest Regal', generally need to be repotted yearly. They are usually divided and repotted in the spring when new growth appears, ensuring that each division has at least one eye or shoot.

Humidity & Misting

Dahlias do not require high humidity levels; they prefer average ambient humidity. It's important to avoid overly wet conditions as this can lead to fungal diseases.

Suitable locations

• Indoor

  Place in bright, indirect light with good air flow.

• Outdoor

  Plant in full sun after frost; enrich soil with compost.

• Hardiness zone

  8-11 USDA

Life cycle

The life cycle of the Dahlia 'Hillcrest Regal' begins with seed germination or tuber growth when planted in well-drained soil during spring after the last frost. The seedlings or sprouts grow into young plants with characteristic foliage, and as they mature, the stems thicken and leaves expand to absorb sunlight for photosynthesis. During the growing season, typically summer to early autumn, the plants produce vibrant, showy flowers that are often used in gardens for their decorative appeal. After flowering, the plants set seed, which can be collected for propagation, or allow the tubers to develop further. As temperatures drop in late autumn, the above-ground part of the plant dies back, and the tubers enter a dormant phase during winter. The following spring, these tubers can be divided and replanted to produce new plants, thus continuing the cycle.

Propogation

• Propogation time

  Spring to Summer

• Dahlia 'Hillcrest Regal' is commonly propagated through division of tubers, which is the most popular method. This process is typically carried out in spring, when the danger of frost has passed and the soil has begun to warm. To propagate dahlias by tuber division, begin by carefully digging up the clumps of tubers without damaging them. Each section of tuber must have at least one eye, which is a small bud from which the new plant will grow. The cuts should be made with a clean, sharp knife. The fresh cuts on the tubers can be treated with a fungicide to prevent rot and then allowed to dry for a day or two to form a callus over the wound. Once the tubers are prepared, they can be planted about 6 to 8 inches (15 to 20 centimeters) deep in well-draining soil, making sure the eyes are facing upwards.