Elaeagnus

Elaeagnus is highly drought-tolerant once established, requiring only occasional deep watering during prolonged dry spells; overwatering, especially in poorly drained soil, can cause root rot. Newly planted specimens need regular, consistent moisture for the first 1-2 growing seasons to develop a robust root system, after which they require minimal supplemental irrigation.

This genus thrives in full sun, which encourages dense foliage growth, abundant flowering, and maximum berry production. It can tolerate partial shade, though growth may become sparser and flowering may be reduced in low-light conditions.

Elaeagnus adapts to a wide range of soil types, including sandy, loamy, clay, and even saline or alkaline soils that are unsuitable for most other ornamental plants. It prefers well-drained soil with a pH between 5.5 and 8.0, and its nitrogen-fixing root nodules allow it to thrive in low-fertility, poor-quality substrates.

Mature elaeagnus plants rarely require fertilization, as they produce their own nitrogen to support growth. Young specimens can benefit from a light application of balanced, slow-release fertilizer in early spring to support establishment, though excess nitrogen can lead to weak, leggy growth.

Most elaeagnus species are cold-hardy in USDA zones 4-9, tolerating winter temperatures as low as -30°F (-34°C) for deciduous varieties and 10°F (-12°C) for evergreen types. They tolerate high heat and humidity well, making them suitable for a wide range of temperate and subtropical climates.

Prune elaeagnus in late winter or early spring before new growth emerges to shape the plant, remove dead or damaged branches, and maintain desired size, especially for hedges. Evergreen varieties can also be lightly sheared after flowering to encourage dense, bushy growth; avoid heavy pruning of old wood, as the plant may be slow to regenerate from bare stems.

Elaeagnus is most commonly propagated from semi-hardwood cuttings taken in late summer, which root readily when treated with rooting hormone and kept in moist, well-drained medium under indirect light. It can also be grown from seed, though seeds require 3-4 months of cold stratification to germinate, and cultivars may not grow true to type from seed.

Elaeagnus tolerates a wide range of humidity levels, from arid continental climates to humid coastal regions, with no specific humidity requirements. Good air circulation around the plant helps prevent foliar fungal diseases in areas with high consistent humidity.

Potted elaeagnus specimens should be repotted every 2-3 years in early spring, moving to a container one size larger with fresh, well-drained potting mix. Mature plants can be root-pruned and returned to the same container to limit size, though they generally perform best when planted directly in the ground.