Description
Aster is a large genus of flowering plants in the family Asteraceae, commonly known as the aster, daisy, or sunflower family. Here are some horticultural notes on the genus:
Growing Conditions: Asters prefer full sun to partial shade and well-drained soil. They can tolerate a wide range of soil types, but will not grow well in waterlogged or compacted soil.
Watering: Asters should be watered regularly, especially during hot and dry periods. However, they do not like to be waterlogged, so make sure the soil is well-drained.
Fertilization: Asters can benefit from regular fertilization during the growing season, especially if grown in nutrient-poor soil. Use a balanced fertilizer every 4-6 weeks.
Pruning: To promote bushy growth and prevent leggy plants, pinch back the stems of young asters in the spring. After flowering, cut back the plant by about one-third to encourage new growth and prevent self-seeding.
Propagation: Asters can be propagated by division in the spring or fall. They can also be grown from seed, which should be sown in the spring or fall.
Pests and Diseases: Asters can be susceptible to fungal diseases, such as powdery mildew and rust. To prevent these, ensure adequate air circulation around the plants and avoid overhead watering. Asters can also attract aphids, which can be controlled with insecticidal soap or neem oil.
Uses: Asters are commonly used in borders, cottage gardens, and as cut flowers. They attract bees and butterflies to the garden and are deer resistant. There are many different species and cultivars available, ranging in height from a few inches to several feet, with flowers in a wide range of colours.