Selecting a planting site
Choose a sunny and well-drained area in loamy, sandy, or clay soil that is acidic to slightly alkaline. The tree can tolerate a site with some shade. Once the tree is established, it can tolerate drought and some wind, but it will not withstand severe conditions, especially when it is young. A strawberry tree can do well despite the presence of salt runoff or salt spray. This strawberry tree can also thrive when planted in urban areas and along streets and highways.
Spacing, depth, and support
If you plan to plant numerous trees or create a hedge with the strawberry tree, plant them 20 to 35 feet apart because the Arbutus unedo is considered to be small to medium in size depending on the cultivar you select. Younger trees may need a stake for support until they become more mature and hardy.
Strawberry Tree Plant Care
Many cultivars of strawberry trees in the United States reach a mature size of 8 to 12 feet tall and wide, though the species can become as tall as 35 feet in the right conditions. Its canopy forms a domed or rounded shape. The fruits are edible, though they are not usually enjoyable when fresh. They can be made into jams and jellies and are also used to make a Portuguese spirit called medronho.
Light
The strawberry tree appreciates more sun than shade. It will thrive if it has 6 hours of full, direct sun a day.
Soil
Like other ericaceous plants, this tree does best in acidic soil. It can also tolerate a neutral pH. You can make your soil more acidic as needed.
Water
It is important to water regularly for the first year so that the tree can form strong roots. The strawberry tree is known to become more drought-resistant as it matures, and it can even grow in salty areas. Plan on 1 inch of water each week to equal the number of inches in the trunks diameter.
Temperature and Humidity
Strawberry trees are hardy in most temperatures and humidity levels. However, the tree will not thrive in excessively humid areas.
Fertilizer
Add about 3 inches of mulch around the base of the tree in the summer to protect it from scorching sunlight and in the winter to protect it from frost. This will also serve as an organic, slow-release fertilizer.
Types of Strawberry Trees
‘Elfin King’: If you don’t want to deal with picking up lots of fallen fruit, choose the dwarf ‘Elfin King’ cultivar. The trade-off, of course, is that it produces less of the showy fruits.‘Rubra’: This strawberry tree cultivar produces deep pink flowers.‘Compacta’: This dwarf strawberry tree is popular because it only grows about 8 to 12 feet high.‘Oktoberfest’: This is another dwarf strawberry tree that is an ideal container plant.
Arbutus Unedo vs. Muntingia Calabura
Both Arbutus unedo and Muntingia calabura are called by the common name of strawberry tree, but they are two different species. To avoid confusion, the Muntingia calabura is also called the Jamaican cherry, as well as the strawberry tree. It grows faster than the Arbutus unedo. The Jamaican cherry tree’s berry tastes like cotton candy.
Harvesting From the Strawberry Tree
The berries on a strawberry tree are typically ready for harvesting in the late fall or winter around November or December. They are best picked when the skins of the berries are very red and they are a bit soft to the touch.
How to the Grow Strawberry Tree in Pots
‘Elfin King’, ‘Oktoberfest’, and ‘Compacta’ are all dwarf strawberry trees that are ideal for growing in pots on a patio in bright light and away from wind. Choose a well-draining pot of any material that’s about 14 inches deep and 14 to 24 inches in diameter to accommodate root growth. The container and tree can be quite heavy so consider putting the potted plant on casters, which will also lift it off the ground to help with drainage.
Pruning
Pruning is not usually necessary for this tree unless branches are growing the wrong way or there are dead, diseased, or dying branches. If you do wish to prune, do so at the end of winter and into early spring. You can also train the shrub so that it has more of a tree form with a single trunk.
Propagating the Strawberry Tree
Propagation of a strawberry tree is possible through cuttings and layering. The process of letting the seedlings of strawberry trees grow enough to plant them outdoors takes patience, which is why layering may work best. The best time to take cuttings from a strawberry tree is in July with a sterilized garden cutting tool. Use rooting hormone on the cuttings and keep them in bright light until they are hardy enough for outdoor planting.
How to the Grow Strawberry Tree From Seed
Seeds from the strawberry tree’s fruits are naturally spread by birds who consume the berries. If you want to grow the strawberry tree from seeds, gather them when you harvest the berries and put them through the stratification process. It may take quite a bit of time before you have a large enough plant to put in the ground outside.
Overwintering
Younger trees may need protective burlap covers in cold weather and frosts to prevent damage to flowers and fruits. Covers can also protect the younger trees from cold winds.
Common Pests and Plant Diseases
Strawberry trees can be affected by many common plant diseases, including Annosus root rot disease, anthracnose, leaf spots, leaf galls, phytophthora (a fungus), sudden oak death, and twig dieback. Common pests that may strike your strawberry shrub include aphids, flatheaded borers, leafminers, scale, thrips, and Western tent caterpillar (Malacosoma californicum).
