Hydrangea 'Annabelle' is characterized by large, round, and dense flower clusters that are composed of small, individual fertile flowers surrounded by larger, showy sterile flowers. The sterile flowers are what give 'Annabelle' its distinctive pompom-like appearance. The flowers start as greenish buds, mature to a creamy white color, and eventually age to light green. The leaves are dark green, serrated, and heart-shaped, providing an attractive backdrop to the flowers.
- Size: 'Annabelle' hydrangeas can grow to be relatively large, reaching heights of 3 to 5 feet (0.9 to 1.5 meters) and spreading out to a width of 4 to 6 feet (1.2 to 1.8 meters). However, their size can vary depending on growing conditions and pruning practices.
- Location: Choose a spot that receives partial shade to full sun. While they can tolerate full sun, they generally prefer some shade during the hottest parts of the day, especially in warmer climates.
- Soil: Well-draining soil that retains moisture is ideal. Hydrangeas prefer slightly acidic to neutral soil pH levels (between 5.5 and 7.0). Amending the soil with organic matter can help retain moisture and improve overall soil quality.
- Watering: Adequate and consistent watering is crucial, especially during hot and dry periods. The soil should be kept consistently moist but not waterlogged. Mulching around the base of the plant can help retain soil moisture.
- Pruning: Pruning is generally done in late winter or early spring. You can cut back the stems to about 1 to 3 feet (0.3 to 0.9 meters) above the ground, leaving a framework for new growth. This encourages robust blooming and helps maintain a more compact shape. 'Annabelle' hydrangeas bloom on new wood, meaning flowers form on the current season's growth.
- Fertilizing:Applying a balanced, slow-release fertilizer in the spring can provide the necessary nutrients for healthy growth and flowering. Follow the manufacturer's instructions for application rates.
- Winter protection: In colder regions, providing some winter protection can be beneficial. Applying a layer of mulch around the base of the plant can help insulate the roots from extreme temperatures.