Elaeagnus is a plant genus comprising several dozen species of shrubs and trees that are native to Asia and North America. One species that is particularly popular among gardeners and landscapers is Elaeagnus angustifolia. This deciduous tree is commonly known as the Russian Olive. It grows 15 to 20 feet in height and spreads a similar width. The oblong leaves have a silvery tinge, which blends well with the cream colored flowers and fleshy yellow fruits. Its irregular, oval crown makes it an ideal hedge tree, especially in regions nears seacoasts.
There are several things to consider when planting and growing the Russian Olive. The condition of the soil, the climate, and certain pests or diseases can affect the health of Elaeagnus angustifolia.
Climate
This shrub thrives in hardiness zones 3 to 8. It prefers full sunlight, rather than partial shade.
Soil Conditions
The Russian Olive does well in most types of soil as long as it is well-draining. Poorly draining soil will lead to root rot, which is a condition that deteriorates the structure and function of the plants root system. Sandy or loamy soil are ideal. The soil pH can be either acidic or alkaline. This tree is very salt tolerant.
Watering and Fertilizers
This tree can thrive in drought conditions for a period of time. It can tolerate dry soil so keep watering to a minimum. Too much water could harm this tree. Fertilizers should be used if the tree is damaged from insects or disease.
Propagation
The best way to propagate this plant is by sowing seeds. Another option is to take tissue cultures, which isn’t recommended.
Pests and Diseases
This tree is mostly free of pests. The occasional scale infestation can be treated by spraying horticultural oil. Leaf spot is a common fungal infection that affects the leaves of the Russian Olive. Verticillium wilt is a much more serious problem that can damage entire branches.
Reference:
Elaeagnus angustifolia – UConn Plant Database
Elaeagnus angustifolia – – University of Florida IFAS Extension