Osteospermum, also known as African daisy or Cape daisy, is a versatile plant that can be grown as both an annual and a perennial, depending on the climate and growing conditions. In its native habitat of South Africa, Osteospermum is a perennial plant that can thrive year-round.
However, in regions with colder climates, Osteospermum is often grown as an annual due to its sensitivity to frost and cold temperatures. In these areas, it is treated as a tender perennial, meaning it is not able to survive the winter months and is replanted each year.
The hardiness of Osteospermum is determined by the USDA hardiness zones, which are based on the average minimum winter temperatures in a given region. Osteospermum is considered a tender perennial and is hardy in USDA zones 10-11. These zones include areas with mild winters and warmer, more tropical climates, such as parts of Florida, California, and Hawaii.
In cooler climates, where winter temperatures regularly drop below the recommended range for Osteospermum, it is best to grow this plant as an annual. This means that it will only survive for one growing season and will need to be replanted each year.
However, even in regions where Osteospermum is considered an annual, it can still be a valuable addition to the garden. Its vibrant and daisy-like flowers, which come in a range of colors including white, yellow, pink, and purple, can add a pop of color to flower beds, borders, rock gardens, containers, and hanging baskets.
I personally have experience growing Osteospermum in both annual and perennial forms. In my garden, located in a zone 9 region, I have successfully grown Osteospermum as a perennial, with the plants returning year after year. I have also grown it as an annual in hanging baskets and containers, enjoying their beautiful blooms throughout the summer months.
To ensure the success of Osteospermum in cooler climates, it is important to provide it with well-draining soil and ample sunlight. This plant prefers full sun to part shade, with at least 6 hours of direct sunlight per day. Regular watering is necessary, especially during hot and dry periods, but be careful not to overwater as Osteospermum can be prone to root rot.
Osteospermum can be both an annual and a perennial plant, depending on the climate and growing conditions. In warmer regions, it can be grown as a perennial, while in cooler climates it is commonly grown as an annual. Regardless of its classification, Osteospermum is a versatile and beautiful plant that can enhance any garden or landscape.
