Environment
Fact-checked

At AllThingsNature, we're committed to delivering accurate, trustworthy information. Our expert-authored content is rigorously fact-checked and sourced from credible authorities. Discover how we uphold the highest standards in providing you with reliable knowledge.

Learn more...

What Is Osmanthus Delavayi?

Rebecca Cartwright
Rebecca Cartwright

Osmanthus delavayi is a large broadleaf evergreen shrub in the Oleaceae family. A native of China, it was introduced into France in the late 1800s by Abbe Jean Marie Delavay, from which it takes its common name, the Delavay tea olive. Another common name for the species is sweet olive. In spring it is covered with small, very fragrant flowers.

The genus name, "Osmanthus" means "fragrant flowers." This plant, and close relatives, have been cultivated in China and Japan for centuries because of their sweet smell in spring. They were often planted in temple courtyards. Left to mature naturally it is a broad shrub but it takes shearing well and can be easily shaped into a hedge or landscape specimen.

Woman with a flower
Woman with a flower

Most Osmanthus delavayi are wider than they are tall. They can eventually reach 20 feet (about 6 m) tall but grow very slowly. Many plants take at least ten years to reach dimensions of 5 feet (about 1.5 m) tall by 7 feet (about 2.13 m) wide. Those grown in gardens or landscapes often are kept at no more than 10 feet (about 3 m) tall by yearly pruning.

The leaves are small and oval-shaped with dark green tops and lighter, speckled, undersides. Each leaf is only 0.5 to 1 inch (about 1.25 to 1.5 cm) long. The leaves have a pronounced central crease and slightly toothed edges. Small leaves allow it to take shearing well, making it a good candidate for use in topiary. Flowers bloom on branches that grew the previous season, so pruning should be done after blooming is over but before the next year's buds set.

Osmanthus delavayi flowers for several weeks in late winter or early spring. Small, tube-like flowers set in clusters that cover the plant with white. The scent is often compared to jasmine, which is a close relative of this shrub. Planting it near walkways or patios is often recommended so that the fragrance is easy to enjoy. The flowers are followed by blue, olive shaped drupes.

A fairly hardy plant, Osmanthus delavayi may need protection from wind in the coldest areas. The plant usually does well when planted in full sun to partial shade. It requires well-drained soil but does well in both acidic and alkaline soils. Osmanthus delavayi usually grows and flowers best where it receives regular, moderate watering, but established plants often have some drought tolerance.

Frequently Asked Questions

What is Osmanthus delavayi and where does it originate?

Osmanthus delavayi, also known as Delavay's osmanthus, is an evergreen shrub native to the Yunnan province in China. It is renowned for its fragrant white flowers that bloom in spring, adding both aesthetic appeal and a delightful scent to gardens and landscapes.

How do you care for Osmanthus delavayi?

Caring for Osmanthus delavayi involves planting it in well-drained soil with access to full sun or partial shade. It requires moderate watering, especially during dry spells, and benefits from pruning to maintain its shape. Fertilize annually with a balanced fertilizer to promote healthy growth and abundant flowering.

Can Osmanthus delavayi tolerate cold temperatures?

Osmanthus delavayi is relatively cold-hardy, able to withstand temperatures down to about -10 degrees Celsius (14 degrees Fahrenheit). However, it thrives best in temperate climates and may require protection from severe frost in colder regions to prevent damage to its delicate flowers and foliage.

What are the benefits of planting Osmanthus delavayi?

Planting Osmanthus delavayi offers multiple benefits, including its compact size, which makes it suitable for small gardens. Its fragrant flowers attract pollinators like bees and butterflies, enhancing biodiversity. Additionally, it can be used as a hedge or ornamental plant, providing year-round greenery and seasonal blooms.

How often does Osmanthus delavayi bloom and what do the flowers look like?

Osmanthus delavayi typically blooms in early spring, with the possibility of a second, less profuse flowering in autumn. The flowers are small, white, and tubular, growing in clusters. They emit a sweet, jasmine-like fragrance that can be quite pronounced, especially in the evening.

Is Osmanthus delavayi susceptible to any pests or diseases?

Osmanthus delavayi is generally a robust plant with few pest or disease issues. However, it can occasionally be affected by common garden pests such as scale insects and aphids. Good cultural practices, such as proper spacing for air circulation and avoiding overhead watering, can help minimize these problems.

Discuss this Article

Post your comments
Login:
Forgot password?
Register:
    • Woman with a flower
      Woman with a flower