Symphyotrichum subspicatum (formerly Aster subspicatus) is a species of flowering plant in the family Asteraceae native to western North America. Commonly known as Douglas's aster, it is a perennial, herbaceous plant that may reach 40 to 120 centimeters (1+1⁄4 to 4 feet) tall. Its flowers have violet ray florets and yellow then reddish disk florets.
Douglas's aster has good disease resistance and is generally not prone to illnesses. However, it can be susceptible to pests and diseases present in its surroundings. These infections are usually mild. Regarding care, the plant requires moderate maintenance. Regular pruning is needed to maintain an attractive appearance and healthy growth. Fertilizing can also help encourage flowering. Douglas's aster is suitable for anyone with outdoor space, such as a garden or patio, and does not require much gardening experience. It may need more attention when grown indoors.
How to keep Symphyotrichum Subspicatum.
Light
Douglas's aster is a sun-loving perennial herbaceous plant that originates in open habitats and is often found growing in meadows and grasslands. It prefers full sun but can also tolerate partial sun.
Temperature
Douglas's aster can tolerate a wide range of temperatures, but its distribution may still be restricted by various combinations of moisture and heat conditions. It grows best in warm summer climates with sufficient rainfall or watering. Prolonged stretches of cloudy, rainy weather, as well as extended high temperatures, raise the likelihood of Douglas's aster dying. In winter, appropriate protection from cold can improve the plant's survival rate.
Fertilizer
Early spring—when Douglas's aster is coming out of dormancy and beginning active growth—is the best time to apply fertilizer. Fertilizing supplies the essential nutrients needed for healthy development. Although this aster has relatively modest fertilizer requirements, feeding it once a year can improve its survival and encourage better, longer-lasting blooms.
Pruning
Douglas's aster is characterized by its abundant purple flowers and bushy growth. To achieve the best results, prune the plant in early spring. This will promote growth and enhance flowering. During pruning, trim away dead stems and thin out any overcrowded areas to improve air circulation. Additionally, remove spent blooms to encourage continuous flowering and reduce the risk of disease.
Botanical profile.
- Plant Type
- Herb
- Life Cycle
- Perennial
- Genus
- Symphyotrichum
- Family
- Asteraceae
- Hardiness Zone
- 3-8
- Mature Height
- 0.3 m to 1.22 m
- Mature Spread
- 49 cm
- Leaf Color
- Green, Dark Green
- Leaf Type
- Deciduous
- Flower Color
- Purple, Lavender
- Flower Size
- 2.03 cm to 3.05 cm
- Bloom Time
- Late summer, Early fall, Mid fall
- Planting Time
- Spring, Summer
- Harvest Time
- Fall
Other names.
Reader questions.
What are the sun requirements for Douglas's aster?
Douglas's aster, scientifically known as Symphyotrichum subspicatum, thrives in conditions where it receives full sun, defined as more than 6 hours of sunlight daily. It's essential to observe how sunlight moves through your garden throughout the day to find spots that offer a good balance of light and shade. This ensures the best growth and happiness of your plants.
