Growing and looking after Eucalyptus
Written by Daily Fix - Published 06-Jun-2023, last updated 20-Jul-2023
Eucalyptus is a genus of over 700 species of flowering trees, shrubs, or mallees in the myrtle family, Myrtaceae. Along with several other genera in the tribe Eucalypteae, including Corymbia, they are commonly known as eucalypts. Plants in the genus Eucalyptus have bark that is either smooth, fibrous, hard or stringy, leaves with oil glands, and sepals and petals that are fused to form a "cap" or operculum over the stamens. The fruit is a woody capsule commonly referred to as a "gumnut".
Native to Australia, Eucalyptus trees are known for their rapid growth, and some species can reach heights of over 300 feet. They are also known for their fragrant leaves, which are often used in essential oils and other products.
Why Eucalyptus is a popular plant choice
Eucalyptus has become an increasingly popular plant choice for both indoor and outdoor spaces, and it's not hard to see why. Firstly, eucalyptus plants are known for their stunning foliage. Their leaves come in various shades of green, ranging from light and silvery to deep emerald, adding a touch of elegance and vibrancy to any setting. Additionally, the unique structure of eucalyptus leaves creates a visually appealing texture that can instantly elevate the aesthetic appeal of a space.
Another reason behind the popularity of eucalyptus is its versatility. These plants thrive in a wide range of climates and conditions, making them an ideal choice for gardeners with varying levels of experience. Whether you live in a tropical region or colder climate, there is likely a species or variety of eucalyptus that will flourish in your area.
Growing Eucalyptus
Growing eucalyptus is a rewarding and versatile endeavor that can bring beauty and benefits to any garden or landscape. With their iconic smooth bark, aromatic leaves, and stunning flowers, eucalyptus trees have become popular choices for both ornamental purposes and practical uses. Whether you are looking to create a windbreak, attract wildlife, or simply add an exotic touch to your outdoor space, learning how to grow eucalyptus successfully is key.
To start growing eucalyptus, it's important to choose the right species for your climate and soil conditions. Some varieties are more cold-hardy than others while some prefer sandy soils over clay ones.
When choosing your Eucalyptus plant remember that they are quick growing plants. So while your local garden centre or nursery might have some stunning large Eucalyptus plants, remember that smaller plants will grow rapidly so purchasing a smaller example is likely to save money and, if looked after properly, it will grow into a substantial plant.
Watering Eucalyptus
Eucalyptus trees are known for their majestic beauty and also their resilience in various climates. However, like any plant, these iconic Australian natives require proper care and attention to thrive. One crucial aspect of eucalyptus tree maintenance is ensuring they receive adequate watering throughout the year. By understanding the specific watering needs of eucalyptus, you can ensure their healthy growth and longevity.
When it comes to watering eucalyptus trees, it's vital to strike a balance between providing enough moisture without overwatering. These trees prefer well-drained soil that allows water to penetrate deeply into their roots. It is generally recommended to water young eucalyptus trees about 2-3 times per week during the first growing season to establish a strong root system.
Fertilising Eucalyptus
Eucalyptus trees are not only known for their iconic beauty but also for their diverse uses, including timber production, essential oil extraction, and as a natural windbreak. To ensure these majestic trees thrive and reach their full potential, fertilisation plays a crucial role in providing them with the necessary nutrients.
These fast-growing species require nitrogen (N), phosphorus (P), potassium (K), as well as trace elements like iron (Fe) and manganese (Mn).
From the beginning of April to the end of August if you liquid feed your potted Eucalyptus once a week using a low nitrogen, low phosphorous, high potash fertiliser (Chempak No. 4 soluble powder for example), you won't go far wrong.
If pruning on a regular basis, you will also need to apply organic slow release sulphur chips once a year in the Spring.
However, Southern Eucs (https://southerneucs.com) has different advice:
Avoid using fertilizer on Eucalyptus trees - they don't need it! Eucs are minimal feeders, and are extremely fast growing. Fertilizers, especially those with high Nitrogen content, will weaken even a healthy tree.
Pruning Eucalyptus
Eucalyptus trees need regular pruning to maintain their health and shape. Pruning eucalyptus trees is an essential step in promoting strong and attractive growth while preventing potential hazards caused by weak or overgrown branches.
it's crucial to prune young eucalyptus trees regularly to encourage a balanced structure. Begin by removing any lower branches that may interfere with pedestrian traffic or obstruct the view of signs or buildings. As the tree grows taller, focus on thinning out overcrowded areas within the canopy to enhance air circulation and reduce the risk of disease.
The prunings make a fantastic display when placed in a vase, either alone, or to enhance a flower display.
Pests and diseases
Eucalyptus trees are not immune to the threats posed by various pests and diseases. These towering giants of the plant world face several challenges that can weaken or even kill them if left untreated. One common pest that affects eucalyptus is the eucalyptus longhorned borer (Phoracantha semipunctata). This beetle lays its eggs on the trunk of the tree, which then hatch into larvae that bore into the wood, causing significant damage. The larvae feed on the inner bark and wood tissues, weakening the tree's structure over time.
Another major threat to eucalyptus health is a fungal disease called Myrtle rust (Austropuccinia psidii).
Regularly inspecting your trees for signs of damage or infestation is crucial. Look out for telltale signs such as leaf discoloration, wilting leaves, or unusual growths. If you notice any of these symptoms, act promptly by removing affected branches or leaves and disposing of them properly.
Furthermore, understanding the most common eucalyptus pests can help you implement appropriate treatment methods.
Common problems with Eucalyptus
Growing eucalyptus can be a rewarding endeavor, but it is not without its challenges. One of the most common problems encountered when cultivating eucalyptus trees is their susceptibility to frost damage. Eucalyptus are native to Australia and thrive in warm climates, so they are not well adapted to withstand freezing temperatures. In areas where winters are harsh, it is crucial to choose cold-hardy eucalyptus species or take preventative measures such as wrapping the trunks with burlap or providing temporary cover during frosty periods.
Another issue that may arise when growing eucalyptus is their voracious growth habit. While rapid growth can be desirable, it also means that these trees require regular pruning and maintenance to keep them in check. Neglecting proper pruning can result in dense foliage and poor air circulation, making the tree more susceptible to diseases and pests.
Conclusion: Should you choose Eucalyptus?
Eucalyptus plants can be a beautiful and exotic addition to any UK garden or pot. They offer a range of benefits, from their stunning foliage to their natural ability to repel insects. However, it is important to consider the specific requirements of these plants before making a decision.
Eucalyptus plants need plenty of sunlight, well-drained soil, and regular watering. Additionally, their potential for rapid growth means that they may require frequent pruning and maintenance.
Overall, if you have the right conditions and are willing to put in the effort, Eucalyptus plants can thrive in your UK garden or pots, adding a touch of uniqueness and elegance to your outdoor space. So why not give them a try?