A large eucalyptus tree is a stunning addition to any garden space, bringing a touch of Australasia to a domestic outdoor setting. In many cases, these eucalyptus trees come in planters' pots, grown professionally in gorgeous shapes, such as smooth lollipops, for added aesthetic appeal. However, larger plants require a slightly different care approach than younger, less mature ones. Once established, eucalyptus species, big or small, are relatively self-sufficient. With a bit of extra attention, they can be a garden mainstay for years to come.
We’ve put together this blog post to offer simple but effective tips for caring for a larger eucalyptus plant, so it fits seamlessly into your garden display.
Eucalyptus trees worship the sun (naturally, since they are native to Australia and surrounding islands). Plant them in a bright, open location that receives at least six hours of direct sunlight per day. Without sufficient light, growth can slow, stems can become leggy, and any sort of form may lose its definition. If you’re growing eucalyptus indoors or in a conservatory, rotate the pot occasionally so all sides receive equal light exposure.
Eucalyptus species are not particularly fussy when it comes to soil. Mature trees can thrive in various soil types as long as they are well-draining; waterlogged soil can lead to the dreaded root rot. A neutral to slightly acidic soil pH is ideal, and you can amend the surrounding soil with organic matter, such as compost or leaf mould, to improve aeration and fertility and encourage stronger growth.
Young eucalyptus trees need consistent watering during their first one to two years, a crucial period for proper root establishment. For mature trees, deep but infrequent watering is best, encouraging roots to grow several feet below ground level, building resilience to drought. In the summer months, you may need to water more often during prolonged dry spells, but avoid overwatering, as this increases the risk of fungal diseases.
Eucalyptus are native to Australia, where conditions are warm and dry. Many varieties, such as Eucalyptus pauciflora, are surprisingly hardy and can tolerate colder climates (perfect in the Great British back garden). They can survive temperatures below freezing, but a severe winter may damage new leaves or young eucalyptus plants. For container-grown specimens, a protective winter root duvet made from bark chip mulch can help shield roots during the colder months. Covering young trees with fleece can help protect the top third of growth from frost if frost is on the horizon.
Mature eucalyptus trees don’t often need much additional fertilisation. Feeding them excessively may result in fast growth, but at the expense of sustainable strength, increasing the risk of falling branches. Test your soil to identify deficiencies before adding nutrients. If needed, opt for a slow-release balanced fertiliser applied sparingly in late winter or early spring, just before the growing season, for steady growth without overwhelming the tree.
Time makes a eucalyptus tree large – you can’t rush greatness with these plants. This also improves its internal regulatory system, making mature trees more drought-tolerant than younger plants. Regular watering for the initial 1–2 years will set them up for this strength. More mature plants appreciate being watered deeply and infrequently, as it allows the roots to grow deeper, furthering the plant’s drought resilience.
Large eucalyptus trees aren’t overly picky with soil. However, wherever the tree is planted, it must be free-draining to avoid waterlogging and root rot. Eucalyptus can generally tolerate poorer soils, but they will grow best in fertile, loamy ground that retains some moisture without becoming compacted. Mulching the surface with old organic matter helps lock in soil moisture during dry spells, stabilising the surrounding soil temperature.
There is no ‘perfect’ soil type for eucalyptus, but mulching makes a big difference.
Spread a layer of organic bark chip mulch around the base of the tree
Be careful not to pile it against the trunk
This retains moisture, suppresses weeds, and keeps soil temperature steady throughout both summer and winter months.
It’s a super simple but highly effective move that supports steady growth and health.
Eucalyptus trees form naturally robust root systems that help them access nutrients without much additional feeding, making fertiliser redundant for most mature trees. However, if a soil nutrient test reveals deficiencies, use a slow-release fertiliser sparingly. Overfeeding can create lush new leaves but leave the stems and branches weak and more susceptible to damage.
Eucalyptus doesn’t need heavy pruning like other shrubs or trees might. Focus on removing any dead, damaged or diseased wood to prevent fungal diseases such as honey fungus or powdery mildew from spreading. If your eucalyptus has been grown in a decorative lollipop shape, occasional trimming will help maintain its form. Always prune in the summer during active growth, making sure not to remove more than one-third of the canopy at once.
Growing eucalyptus from seed is a rewarding way to bring these striking trees to your garden from the ground up. Start seeds indoors in small pots filled with a free-draining compost mix, keeping the soil lightly moist and placing the pots in a sunny spot. Germination usually occurs within two to four weeks. Once seedlings have developed several sets of leaves, they can be transplanted into larger pots or directly into a garden bed. Remember, young eucalyptus are more sensitive to temperature drops (commonplace in the UK), so protect them during their first winter.
Pot size is a crucial consideration for growing eucalyptus in containers. Choose a deep pot with space for the fast-growing root system to spread. As the tree grows, it will need repotting into a different, larger home every few years to avoid becoming rootbound. Refresh the soil at the same time, following the same principles you would typically use. For very large specimens, you may need to top-dress with fresh soil rather than repot, as mature eucalyptus trees are heavy and difficult to move.
Eucalyptus leaves are prized for their refreshing scent and are known for their positive impact on smell psychology. They can be harvested throughout the year; just take care not to strip entire branches, as this can stress the tree. Snip small sprigs from the canopy, focusing on new leaves for the most pungent fragrance. Remember that eucalyptus oil is toxic if ingested in large amounts, so harvested leaves should only be used for decorative or aromatic purposes unless properly processed.
Eucalyptus is generally hardy, but it is not immune to illnesses. Two common fungal diseases are powdery mildew and honey fungus, which can cause significant damage if untreated. Good air circulation, avoiding waterlogging, and pruning away diseased growth will help prevent outbreaks.
Brown leaves can be caused by drought stress, frost damage or fungal infections. Check soil moisture and look for signs of rot or pests, adjust watering habits accordingly, and remove affected foliage to encourage new growth.
Large eucalyptus trees are known for dropping branches, particularly if left unpruned or over-fertilised. This natural shedding is sometimes self-protective, especially during hot weather. Regularly inspect your tree for weak limbs, and prune them before they become hazardous.
Yes, eucalyptus is easy to grow once established. Young plants require more care, but mature trees are low-maintenance and drought-tolerant.
Eucalyptus trees are fast growers, with some species shooting up several feet each year under ideal conditions.
Yes, most eucalyptus can be planted outside in the UK, provided you choose a hardy variety such as Eucalyptus gunnii azura. Protect young trees during their first few winters.
Some gardeners avoid eucalyptus because of their vigorous growth, potential for falling branches, and the fact that parts of the tree are toxic to pets and humans if ingested.
Ensure indoor eucalyptus receives plenty of sunlight, water it regularly but sparingly, and repot as it grows. Indoor plants benefit from regular pruning to keep their size manageable.
By understanding the needs of your large eucalyptus tree, from soil and water to pruning and protection, you can enjoy its beauty and fragrance for years to come.
If you’re interested in pre-grown, potted plants like large eucalyptus trees and many more, visit One Click Plants today. For more growing guides and gardening insights, visit our Knowledge Hub right now!
