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{{Taxobox
__NOTOC__{{Plantbox
| color = lightgreen
| name = ''Psidium''
| name = Guava
| common_names = Guava, Tropical Guava
| growth_habit = evergreen shrubs/small trees{{SSN}}
| high = ? <!--- 1m (3 ft) -->
| wide = <!--- 65cm (25 inches) -->
| origin = Mexico thru C America
| poisonous = <!--- indicate parts of plants which are known/thought to be poisonous -->
| lifespan = <!--- perennial, annual, etc -->
| exposure = full sun, high-shade{{SSN}}
| water = moderate{{SSN}}
| features = fruit{{SSN}}
| hardiness = <!--- frost sensitive, hardy, 5°C (40°F), etc -->
| bloom = <!--- seasons which the plant blooms, if it is grown for its flowers -->
| usda_zones = ? <!--- eg. 8-11 -->
| sunset_zones = varies by species{{SSN}}
| color = IndianRed
| image = Psidium guajava.jpg
| image = Psidium guajava.jpg
| image_width = 1px
| image_width = 240px <!--- leave as 240px if horizontal orientation photo, or change to 180px if vertical -->
| image_caption = Apple Guava ''Psidium guajava'' <br/>fruit and leaves
| image_caption = Apple Guava ''Psidium guajava'' <br/>fruit and leaves
| regnum = [[Plant]]ae
| regnum = Plantae
| divisio = [[Flowering plant|Magnoliophyta]]
| divisio = Magnoliophyta
| classis = [[Magnoliopsida]]
| classis = Magnoliopsida
| ordo = [[Myrtales]]
| ordo = Myrtales
| familia = [[Myrtaceae]]
| familia = Myrtaceae
| genus = '''''Psidium'''''
| genus = Psidium
| genus_authority = [[Carolus Linnaeus|L.]]
| species =
| subdivision_ranks = Species
| subspecies =
| subdivision =
| cultivar =
}}
}}
'''Adaptation''': The tropical guava is best adapted to the warm climate of Florida and Hawaii, although it can be grown in coastal Southern California, and with some protection, selected areas north to Mendocino County. Guavas actually thrive in both humid and dry climates, but can survive only a few degrees of frost. The tree will recover from a brief exposure to 29° F but may be completely defoliated. Young trees are particularly sensitive to cold spells. Older trees, killed to the ground, have sent up new shoots which fruited 2 years later. Guavas can take considerable neglect, withstanding temporary waterlogging and very high temperatures. They tend to bear fruit better in areas with a definite winter or cooler season. The adaptability of the guava makes it a serious weed tree in some tropical areas. The smaller guava cultivars can make an excellent container specimen.
'''Guava''' (from [[Arawak]] via [[Spanish language|Spanish]], '''Guayaba''') is a genus of about 100 species of [[tropical]] [[shrub]]s and small [[tree]]s in the myrtle family [[Myrtaceae]], native to [[Mexico]], the [[Caribbean]], [[Central America]] and northern [[South America]]. The [[leaf|leaves]] are opposite, simple, elliptic to ovate, 5-15 cm long. The [[flower]]s are white, with five petals and numerous stamens. ''Psidium'' species are used as food plants by the [[larva]]e of some [[Lepidoptera]] species including ''[[Eupseudosoma|Eupseudosoma aberrans]]'', [[Eupseudosoma|Snowy Eupseudosoma]] and ''[[Hypercompe|Hypercompe icasia]]''.
'''Growth Habit''': Guavas are evergreen, shallow-rooted shrubs or small trees to 33 ft, with spreading branches. Growth in California is rarely over 10 - 12 feet. The bark is smooth, mottled green or reddish brown and peels off in thin flakes to reveal the attractive "bony" aspect of its trunk. The plant branches close to the ground and often produces suckers from roots near the base of the trunk. Young twigs are quadrangular and downy.
'''Foliage''': Guava leaves leaves are opposite, short-petioled, oval or oblong-elliptic, somewhat irregular in outline, 2 - 6 inches long and 1 - 2 inches wide. The dull-green, stiff but leathery leaves have pronounced veins, and are slightly downy on the underside. Crushed leaves are aromatic.
'''Flowers''': Faintly fragrant, the white flowers, borne singly or in clusters in the leaf axils, are 1 inch wide, with 4 or 5 white petals. These petals are quickly shed, leaving a prominent tuft of perhaps 250 white stamens tipped with pale-yellow anthers.
Guavas are primarily self-fruitful, although some strains seem to produce more fruit when cross-pollinated with another variety. Guavas can bloom throughout the year in mild-winter areas, but the heaviest bloom occurs with the onset of warm weather in the spring. The exact time can vary from year to year depending on weather. The chief pollinator of guavas is the honeybee.
Guava leaves are used for medicinal purposes, as a remedy for [[diarrhea]][http://www.icddrb.org:8080/images/jhpn222_healthcare-use.pdf], and for their supposed antimicrobial properties. The same anti-diarrheal substances which are useful in folk medicine may also cause constipation in the case of consumption of large amounts of guava fruits. In [[Cuba]] their leaves are also used in barbecues providing a nice smoked flavor and scent to the meat. In recent studies, Guava is believed to have sugar lowering properties to help diabetics lower their sugar count. While testing is not fully conclusive, results have been promising as a natural means to help diabetics combat high sugar.
'''Fruits''': Guava fruits may be round, ovoid or pear-shaped, 2 - 4 inches long, and have 4 or 5 protruding floral remnants (sepals) at the apex. Varieties differ widely in flavor and seediness. The better varieties are soft when ripe, creamy in texture with a rind that softens to be fully edible. The flesh may be white, pink, yellow, or red. The sweet, musky odor is pungent and penetrating. The seeds are numerous but small and, in good varieties, fully edible. Actual seed counts have ranged from 112 to 535. The quality of the fruit of guavas grown in cooler areas is often disappointing.
==Cultivation==
[[Image:Psidium cattleianum.jpg|thumb|Strawberry Guava ''Psidium cattleianum'']]
'''Location''': Like other tender subtropicals, guavas need a frost-free location, but are not too fussy otherwise. They prefer full sun.
'''Soil''': The guava will tolerate many soil conditions, but will produce better in rich soils high in organic matter. They also prefer a well-drained soil in the pH range of 5 to 7. The tree will take temporary waterlogging but will not tolerate salty soils.
'''Selected species'''
'''Irrigation''': Guavas have survived dry summers with no water in California, although they do best with regular deep watering. The ground should be allowed to dry to a depth of several inches before watering again. Lack of moisture will delay bloom and cause the fruit to drop.
*''[[Psidium australe]]'' [[Cambess.]]
*''[[Psidium cattleianum]]'' - Strawberry Guava, Peruvian Guava.
'''Pruning''': Shaping the tree and removing water shoots and suckers are usually all that is necessary. Guavas can take heavy pruning, however, and can be used as informal hedges or screens. Since the fruit is borne on new growth, pruning does not interfere with next years crop.
*''[[Psidium cinereum]]'' [[Carl Friedrich Philipp von Martius|Mart.]]
*''[[Psidium friedrichsthalium]]'' - Costa Rica Guava, Cas Guava
'''Fertilization''': Guavas are fast growers and heavy feeders, and benefit from regular applications of fertilizer. Mature trees may require as much as 1/2 pound actual nitrogen per year. Apply fertilizer monthly, just prior to heavy pruning.
*''[[Psidium galapageium]]'' Galápagos Guava
*''[[Psidium guajava]]'' - Apple Guava
'''Frost protection''': Overhead protection and planting on the warm side of a building or structure will often provide suitable frost protection for guavas in cooler areas. A frame over the plant covered with fabric will provide additional protection during freezes, and electric lights can be included for added warmth. Potted plants can be moved to a more protected site if necessary.
*''[[Psidium guineense]]'' - Guinea Guava
*''[[Psidium incanescens]]'' [[Carl Friedrich Philipp von Martius|Mart.]]
'''Harvest''': In warmer regions guavas will ripen all year. There is a distinctive change in the color and aroma of the guava that has ripened. For the best flavor, allow fruit to ripen on the tree. The can also be picked green-mature and allowed to ripen off the tree at room temperature. Placing the fruit in a brown paper bag with a banana or apple will hasten ripening. Mature green fruit can be stored for two to five weeks at temperature between 46° and 50° F and relative humidity of 85 to 95 percent. Fruit that has changed color cannot be stored for any extended periods. It bruises easily and will quickly deteriorate or rot. Commercial juice varieties have rock hard inedible seeds, deep pink flesh and hard yellow rinds. They are not good for eating out of hand but have extremely high vitamin C content.
*''[[Psidium littorale]]'' - Cattley Guava
*''[[Psidium montanum]]'' - Mountain Guava
===Propagation===
Guava seed remain viable for many months. They often germinate in 2 - 3 weeks but may take as long as 8 weeks. Since guavas cannot be depended upon to come true from seed, vegetative propagation is widely practiced. They are not easy to graft, but satisfactory techniques have been worked out for patch-budding by the Forkert Method (probably the most reliable method), side-veneer grafting, approach grafting and marcotting The tree can also be grown from root cuttings. Pieces of any roots except the smallest and the very large, cut into 5 - 10 inch lengths, are placed flat in a prepared bed and covered with 2 - 4 inches of soil, which must be kept moist. They may also be grown by air-layering or from cuttings of half-ripened wood. Pieces 1/4 - 1/2 inch will root with bottom heat and rooting-hormone treatment. Trees grown from cuttings or air-layering have no taproot, however, and are apt to be blown down in the first 2 or 3 years. One of the difficulties with budded and grafted guavas is the production of water sprouts and suckers from the rootstocks.
===Pests and diseases===
Foliage diseases, such as anthracnose, can be a problem in humid climates. They can be controlled with regular fungicide applications. Where present, root-rot nematodes will reduce plant vigor. Guava whitefly, guava moth and Caribbean fruit fly can be major problems in southern Florida, but have not been reported in California. Mealy-bugs, scale, common white flies and thrips can be problems in California. In some tropical countries the where fruit flies are a problem, the fruit is covered when small with paper sacks to protect it and assure prime quality fruits for the markets.
==Varieties==
===Cultivars===
*'''Beaumont''' - Selected from a seedling population derived from fruits found in Halemanu, Oahu, Hawaii. Medium to large, roundish fruits weighing up to 8 ounces. Flesh pink, mildly acid, seedy. Excellent for processing. Somewhat susceptible to fruit rots. Tree vigorous, wide spreading, very productive.
*'''Detwiler''' - Originated in Riverside, Calif. in the early 1900's. Selected by H. J. Webber. Medium to large, roundish fruit, about 3 inches in diameter. Skin greenish-yellow, moderately thick. Flesh yellowish to salmon, medium firm, relatively sweet, of pleasant flavor. Quality very good. Tree is a very heavy bearer.
*'''Hong Kong Pink''' - Selected at Poamoho Experimental Farm, Oahu, Hawaii from seed obtained from a clone grown in Hong Kong. Medium to large, roundish fruit fruit weighing 6 - 8 ounces. Flesh is pinkish-red, very thick, smooth-textured. Flavor subacid to sweet, very pleasant, few seeds. Tree spreading, high yielding.
*'''Mexican Cream''' - Originated in Mexico. Small to medium-small, roundish fruits. Skin light yellow, slightly blushed with red. Flesh creamy white, thick, very sweet, fine-textured, excellent for dessert. Seed cavity small with relatively soft seeds. Tree upright.
*'''Red Indian''' - Originated in Dade County, Fla. by Fred Lenz. Introduced in 1946. Medium-large, roundish fruit, of strong odor. Skin yellow, often with pink blush. Flesh medium thick, red, sweet, quality good. Ascorbic acid content averages 195 mg per 100 g fresh fruit, total sugars 7 - 10%. Seeds numerous but small. Good for eating out of hand.
*'''Ruby X''' - Hybrid of the Florida cultivars Ruby and Supreme. Small, roundish fruit. Skin greenish-yellow. Flesh dark pinkish-orange. Flavor delicious, sweet, seed cavity 33% of pulp. Tree bushy, low growing, with vigorous branches drooping outward.
*'''Sweet White Indonesian''' - Large, round fruit, 4 inches or more in diameter. Thin, pale yellow skin. Thick white, melting flesh of a sweet, delicious flavor. Edible seeds in cavity surrounded by juicy pulp. Vigorous, fast growing tree, bears several times a year.
*'''White Indian''' - Originated in Florida. Small to medium-sized, roundish fruit, 2-1/2 to 3 inches in diameter. Flesh thick, white, moderately seedy. Excellent, sprightly flavor. Tree somewhat of a shy bearer.
*'''White Seedless''' - An improved selection from Florida with seedless, white flesh of good quality.
===Species===
Selected species
<div float="left">
{{col-begin|width=70%}}
{{col-1-of-2}}
* ''[[Psidium amplexicaule]]''
* ''[[Psidium araao]]'' <small>Raddi</small>
* ''[[Psidium araca]]'' <small>Raddi</small>
* ''[[Psidium australe]]'' <small>[[Cambess.]]</small>
* ''[[Psidium cinereum]]''
* ''[[Psidium dumetorum]]'' – [[Jamaican Guava]] ([[extinct]]: late 1970s)
* ''[[Psidium firmum]]'' <small>[[Otto Karl Berg|O.Berg]]</small>
* ''[[Psidium friedrichsthalium]]'' – [[Cas Guava]], [[Costa Rica Guava]], ''"[[arrayán]]"'' ([[El Salvador]])
* ''[[Psidium galapageium]]'' – [[Galápagos Guava]]
* ''[[Psidium guajava]]'' – [[Apple Guava]], Common Guava
* ''[[Psidium guineense]]'' <small>Sw.</small> – [[Guinea Guava]]<!-- OrnitolColomb3:7. -->
* ''[[Psidium harrisianum]]''
* ''[[Psidium havanense]]''
* ''[[Psidium incanescens]]'' <small>[[Carl Friedrich Philipp von Martius|Mart.]]</small>
{{col-2-of-2}}
* ''[[Psidium littorale]]'' – [[Cattley Guava]], Peruvian Guava, ''"[[arazá]]"'' ([[Colombia]]), "Chinese guava" (as [[invasive species]])
** ''Psidium littorale'' var. ''cattleianum'' – Strawberry Guava
** ''Psidium littorale'' var. ''littorale'' – Lemon Guava, ''waiawī'' ([[Hawaiian language|Hawaiʻi]])
* ''[[Psidium montanum]]'' – [[Mountain Guava]]
* ''[[Psidium pedicellatum]]''
* ''[[Psidium robustum]]'' <small>O.Berg</small>
* ''[[Psidium rostratum]]''
* ''[[Psidium sartorianum]]'' – [[Sartre Guava]], ''"[[arrayán]]"'' ([[Mexico]]), ''[[guyabita del Peru]]'' ([[Panama]], [[Costa Rica]])
* ''[[Psidium sintenisii]]'' – ''[[hoja menuda]]''
* ''[[Psidium socorrense]]''
* ''[[Psidium spathulatum]]'' <small>Mattos</small>
{{col-end}}
</div>
==Gallery==
{{photo-sources}}<!-- remove this line if there are already 3 or more photos in the gallery -->
<gallery>
<gallery>
* [[Feijoa]] (''Feijoa sellowiana'')
* [[Feijoa]] (''Feijoa sellowiana'')
* [[List of fruits]]
* [[List of fruits]]
==References==
*[http://www.crfg.org/pubs/ff/guava.html CRFG Tropical Guava fruit facts page]
<!--- xxxxx *Flora: The Gardener's Bible, by Sean Hogan. Global Book Publishing, 2003. ISBN 0881925381 -->
<!--- xxxxx *American Horticultural Society: A-Z Encyclopedia of Garden Plants, by Christopher Brickell, Judith D. Zuk. 1996. ISBN 0789419432 -->
<!--- xxxxx *Sunset National Garden Book. Sunset Books, Inc., 1997. ISBN 0376038608 -->
==External links==
==External links==
* [http://www.hort.purdue.edu/newcrop/morton/guava.html Fruits of Warm Climates: Guava]
*{{wplink}}
{{stub}}
[[Category:Categorize]]
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