Atriplex prostrata, commonly known as spear-leaved orache or fat hen, is an annual herb native to a variety of habitats including coastal areas, saline environments, disturbed sites, and agricultural land across Europe, Macaronesia, northern Africa, Ethiopia, the Middle East, western Siberia, and Central Asia. It has been introduced to many temperate regions worldwide. This plant typically grows to a height of 20-90 cm and has a sprawling habit. The leaves are variable in shape, often spear-like, with a silvery-green hue due to a covering of tiny reflective hairs. The inconspicuous green flowers bloom from July to September and are wind-pollinated. While not known for showy flowers, Atriplex prostrata is valued for its ability to thrive in poor soils and its use in phytoremediation to remove contaminants from the soil.

In cultivation, Atriplex prostrata is often used for its foliage in ornamental plantings, as ground cover, or in wildlife gardens to support birds and insects. It is drought-tolerant and can grow in a range of soil types, though it prefers well-drained soils and can tolerate saline conditions. It is suitable for full sun to part shade. There are no major disease problems, but it can self-seed prolifically and may become weedy. In regions where it is not native, it can outcompete local vegetation and is considered potentially invasive. Gardeners should be cautious and check local regulations before planting.CC BY-SA 4.0