Hardiness zones
Sunset 12-24
USDA 7-11
Landscape Use: Edible fruits, screen background large shrub for mesic and oasis landscape gardens in the Phoenix area.
Form & Character: Evergreen woody large shrub to small tree depending on how it is trained, imposing, full, dense, mesic, formal.
Growth Habit: Moderate growth rate eventually reaching 15-20 feet (taller in climates with less extreme heat) with a somewhat lesser spread, dense canopy
Foliage/Texture: Leaves mostly whorled at the branch tips, elliptical-lanceolate to obovate lanceolate, 5" to 12" in length and 3" to 4" in in width; dark-green and glossy on the upper surface, whitish-or rusty-hairy beneath, thick, stiff, with conspicuous parallel, oblique veins, each usually terminating at the margin in a short, prickly point, coarsely serrate; coarse texture.
Flowers & Fruits: Fragrant flowers, borne in rusty-hairy, terminal
panicles of 30 to 100 blooms, white, 5-petalled, 1/2" to 3/4" in width. Fruits, in
clusters of 4 to 30, oval, rounded or pear-shaped, 1 to 2 in long, with smooth
or downy, yellow to orange, sometimes red-blushed, exoderm and white, yellow or
orange, succulent mesoderm. Fruits have a sweet to sub-acid or acid flavor
(tasty). Fruit contain 1 to 10 small seeds (normally 3 to 5), brown,
angular-ellipsoid. Seeds contain the
chemical cyanogenic glycoside which can be poisonous if eaten in
significant quantities, especially by children.
Seasonal Color: None
Temperature: Cold hardy to 15oF once established, but heat
sensitive. Sunburn, called "purple spot", is responsible for much fruit loss in
hot regions with long summers.
Light: Full sun to partial shade
Soil: Salt and alkaline soil sensitive, needs good drainage, prefers a
rich organic amended soil.
Watering: Regular irrigations are needed throughout the year.
Pruning: Little to none required, and in Phoenix pruning is discouraged
as loquat are prone to trunk sunscald. The thinning of flowers and young
fruits in the cluster, or the clipping off of the tip of the cluster, or of
entire clusters of flowers and fruits, can be done to enhance fruit size.
Propagation: Seed (remain viable for 6 months if stored in partly
sealed glass jars under high humidity at room temperature, but the best
temperature for storage is 40º F) or vegetative softwood cuttings (difficult to root). Cleft and
veneer grafting have been used successfully in Florida and Pakistan respectively
in commercial operations. Air-layering is successful if treated with 3%
NAA (2-naphthoxyacetic acid).
Disease and pests: Bacillus amylovorus, Phytophthora,
and Pseudomonas eriobotryae, and Erwinia are problems in
California; however these diseases on loquat are not common in Arizona because
of the drier climate.
Additional comments: Many will classify loquat as a small tree; however,
given that in Phoenix it is a necessity to allow the foliar canopies of loquat
plants to extend to the ground to prevent sunscald it functionally is a large
shrub. There are over 800 varietal selections worldwide.
Loquat fruits can act as a sedative. Loquat flowers
have expectorant properties. An infusion of the leaves, or the dried, powdered
leaves, may be taken to relieve diarrhea and depression and to counteract
intoxication from consumption of alcoholic beverages. Loquat is one of
the most popular cough remedies in the Far East and is an ingredient of many
patent cough medicines.