Feijoa sellowiana

Acca sellowiana – a species of flowering plant in the myrtle family, Myrtaceae – is native to the highlands of southern Brazil, eastern Paraguay, Uruguay, northern Argentina, and Colombia. It is widely cultivated as an ornamental tree and for its fruit. Common names include feijoa (/feɪˈʒoʊ.ə/, /-ˈhoʊ.ə/), pineapple guava and guavasteen, although it is not a true guava. It is an evergreen, perennial shrub or small tree, 1–7 metres (3.3–23.0 ft) in height. Feijoa sellowiana Berg is from the genus which the German botanist, Ernst Berger, named after João da Silva Feijó, a Portuguese naturalist, and the specific name honors Friedrich Sellow, a German who first collected specimens of feijoa in southern Brazil. It has been nicknamed 'pineapple guava', 'Brazilian guava', 'fig guava' or 'guavasteen' among different countries. The fruit, known as feijoa maturing in autumn, is green, ellipsoid, and about the size of a chicken egg. It has a sweet, aromatic flavour, which tastes like pineapple, apple and mint. The flesh is juicy and is divided into a clear, gelatinous seed pulp and a firmer, slightly granular, opaque flesh nearer the skin. The fruit falls to the ground when ripe and at its fullest flavour, but it may be picked from the tree prior to falling to prevent bruising. The fruit pulp resembles the closely related guava, having a gritty texture. The feijoa pulp is used in some natural cosmetic products as an exfoliant. Feijoa fruit has a distinctive, potent smell that resembles that of a fine perfume. The aroma is due to the ester methyl benzoate and related compounds that exist in the fruit. It is a warm-temperate to subtropical plant that also will grow in the tropics, but requires at least 50 hours of winter chilling to fruit, and is frost-tolerant. When grown from seed, feijoas are noted for slow growth during their first year or two, and young plants, though cold tolerant, can be sensitive to high wind. In the Northern Hemisphere, this species has been cultivated as far north as western Scotland, but under such conditions it does not fruit every year, as winter temperatures below approximately −9 °C (16 °F) kill the flower buds. Summer temperatures above 90 °F (32 °C) may also have an adverse effect upon fruit set. Feijoas are somewhat tolerant of drought and salt in soils, though fruit production can be adversely affected. Tolerant to partial shade, regular watering is essential while fruit is maturing. Some grafted cultivars of feijoa are self-fertile. Most are not, and require a pollinator. Seedlings may or may not be of usable quality, and may or may not be self-fertile. Feijoas will mature into a sprawly shrub, but can be kept successfully as a large container plant, though accommodations will need to be made for the width of the plants, and the need to encourage new growth for fruit production. Feijoas are occasionally found as landscape plants in Texas, Florida, California, and the maritime Pacific Northwest. They can succeed in greenhouses in temperate parts of the United States, and have been grown in-ground as fruiting trees on the United States east coast in coastal Georgia and South Carolina as well as in California. Other regions of the United States such as the southernmost Appalachian Mountains, and the immediate coastal region from North Carolina to Delaware would warrant further investigation.