Tree · Myrtaceae
Guava
Psidium guajava
Give it full sun, warmth, and frost protection, and a guava tree hangs heavy with fragrant fruit for years.
Full sun
Every 5–10 days
90–150 days
USDA 9–11
Overview
Guava is a fast-growing tropical tree of the myrtle family, native to the American tropics and now spread across the warm parts of the world. Left to grow, it stretches 10 to 30 feet (3 to 9 m), but growers usually prune it low, keeping the rounded, fragrant, vitamin-rich fruit within a hand's reach on the branch.
It is a forgiving tree and quick to bear. Its roots take hold in a wide range of soils, from loose sand to hard limestone, and once settled the tree shrugs off a short dry stretch. Cold is the single thing it cannot take, since a night near freezing scorches the soft, pale new growth to black.
Where winters stay mild, a guava roots into the ground and starts cropping within a few years. In cooler regions it lives in a large pot that shifts under cover as frost nears. In either place, full sun and steady warmth swell the heaviest, sweetest fruit on the branch.
Care
The short version: full sun and warmth above all, with deep watering through flowering and fruiting and a lighter hand once the fruit takes on color. Feed lightly across the growing season, prune after harvest to keep fresh fruiting wood coming, and shield the tender growth from any touch of frost.
Light
Guava colors and sweetens its fruit best under full sun, though it will hold on in partial sun. Deep shade turns the tree toward leaf and away from flower, so the brightest open ground draws out the fruit.
Water
Water runs deep and regular while the tree establishes and through flowering and fruiting. A mature tree stands up to drought, but steady moisture builds better fruit, and easing off just before harvest draws the flavor tight in the flesh.
Soil
The roots take unfussily to well-drained loam, loose sand, even hard limestone. Guava runs across a wide pH band of 4.5 to 7.0, so most garden soils will hold it as long as water drains clear away.
Temperature
Guava grows from 32°F to 95°F (0°C to 35°C) and has no tolerance for frost. A night near freezing blackens the soft growth, which makes warmth the single largest factor behind a fruitful tree.
Humidity
Everyday humidity in the 40% to 70% range sits well with guava, matching the warm, moderately humid tropics it comes from. Out in the open air, there is no number to chase.
Feeding
Feed monthly through spring and summer with a balanced fruit-tree fertilizer carrying micronutrients. Young trees fill out on light, frequent feeding rather than heavy doses, and an excess of nitrogen swells leaf at the cost of fruit.
Pruning
Prune after harvest to cut out deadwood, hold the height low for easy picking, and open the crown to light and moving air. Because guava fruits on new growth, a light tip prune keeps fresh green fruiting shoots pushing out.
Repotting
A container guava steps up every 2 to 3 years, best in spring. Look for pale roots circling the pot or slipping through the drainage holes, water running straight through, and growth and fruiting that have stalled.
Size & spacing
Unchecked, a guava climbs 10 to 30 feet (3 to 9 m) tall and spreads 10 to 20 feet (3 to 6 m) wide. Most growers prune well beneath that so the fruit hangs within reach.
When to plant
Guava is a warm-climate tree that cannot take frost, so its timing turns on staying clear of the cold. Start seed in late winter under warm cover, set young trees out in spring once frost has passed, and look for the fruit to color from late summer through fall, with year-round bearing in frost-free places.
Northern hemisphere
Southern hemisphere
Typical months for a temperate climate: start earlier in warm zones, later where spring frosts linger.
- Sow: late winter to early spring in warm conditions
- Plant: spring after all danger of frost has passed
- Harvest: flowers in spring; fruit ripens late summer through fall, with some bearing year-round in frost-free climates
Hardiness
USDA hardiness zones: 9–11
Temperature: down to -7°C
Troubleshooting
Most guava trouble traces to cold, to pests working inside the fruit, or to a tree that throws leaves in place of flowers. Match what you see on the branch below and act early, before a setback strips a season's crop.
Charcoal-toned, slumping shoot tips after cold
When the shoot tips turn black and hang limp after a cold night, the record points to frost damage on a tree that carries almost no cold tolerance. The soft new leaves and the youngest tips take the injury near freezing, blackening while the woodier trunk usually holds firm underneath. Let the pruning wait for spring, when the fresh green flush draws a clear line between dead and living wood, and cover the tree with frost cloth or wrap the trunk before the next cold snap.
Fix:
- Wait until spring to prune out clearly dead wood once new growth shows the live boundary
- Protect with frost cloth, mulch, or trunk wraps during cold snaps
- Grow in a container that can be moved indoors in marginal climates
Maggot-riddled flesh, fruit sagging and dropping ahead of ripeness
Slice a ripening guava and the small white larvae threading through the flesh belong to the fruit fly, a pest that treats this tree as a prime host. Where a female has stung the skin, the fruit turns soft and mottled, its color breaking down as it falls early. Take the crop the moment it begins to color and ripen rather than letting it soften on the branch, sleeve the young fruit in bags against egg-laying females, and clear every dropped fruit from the ground to break the breeding cycle.
Fix:
- Harvest fruit early as it begins to ripen rather than leaving it to fully soften on the tree
- Bag developing fruit to exclude egg-laying females
- Collect and destroy fallen and infested fruit promptly to break the breeding cycle
Plenty of leaves but little or no fruit
A guava dense with glossy green leaves yet bare of fruit is usually caught by too much nitrogen or too little sun, both of which tip the tree into leaf instead of flower. Aging, unpruned wood compounds it, since the blossoms open only on fresh growth. Set the tree in full sun, move to a balanced fruiting feed, and prune lightly to draw out the new shoots on which the flowers form.
Fix:
- Move to or maintain full-sun exposure
- Reduce high-nitrogen fertilizer and use a balanced fruiting formula
- Lightly prune to stimulate fresh fruiting shoots
Toxicity
Guava is one of the gentle ones. Its fruit is a well-loved food eaten whole, thin skin, fragrant flesh, and gritty seeds together, and no part of the plant is listed as poisonous to cats, dogs, or other animals. Share the ripe fruit freely, keeping portions sensible as with any treat.
Safe for
People · Cats · Dogs · Horses · Rabbits · Livestock · Birds
Cats None
A cat that mouths a leaf or a scrap of fruit meets nothing poisonous, since no part of the guava is toxic to them.
Dogs None
A little soft, ripe guava does a dog no harm. The amount stays small, as a heavy helping of any fruit can loosen the stomach.
Horses Safe
Guava holds no toxins for horses, and a mouthful of leaves or fruit passes without harm.
Rabbits Safe
A small piece of the soft fruit suits a rabbit, though hay should stay the mainstay of the diet ahead of sweet morsels.
Livestock Safe
Cattle, goats, and sheep browse the leaves and windfall fruit without ill effect, a familiar forage across the tropics.
Birds Safe
Birds pull at the soft, ripe fruit and carry off the many small seeds, scattering them far, which is how the tree slips into the wild.
People Safe
People eat guava fresh or cooked, taking the thin skin, the fragrant flesh, and the gritty seed-filled core all together.
The ripe fruit is safe; as with any new food, offer pets only small amounts and avoid letting them swallow large seeds or pits of other fruits.
Varieties
Guava's named cultivars sort out mostly by the color of the flesh, its sweetness, and the size of the tree. A few turn up again and again in home gardens.
Ruby Supreme
A Florida selection whose deep pink flesh carries sweet, aromatic fruit and a steady, reliable crop.
Mexican Cream (Tropical White)
Its flesh is mild, sweet, and creamy white, borne on a fairly compact tree that fits a smaller garden.
Lucknow 49 (Sardar)
A widely grown Indian cultivar bearing heavy crops of large fruit with clean white flesh.
How to propagate
Guava is easy to multiply, and the method you choose decides whether the new tree matches the parent. Seed is the simplest but variable, while cuttings, layering, and grafting each hold a cultivar true.
SeedEasy
Spring in warm conditions · Germinates in 2 to 8 weeks; bears fruit in 2 to 4 years
The many small, hard seeds inside a ripe guava sprout easily. Sown in the warmth of spring, they push up over 2 to 8 weeks, but the resulting tree strays from its parent and takes 2 to 4 years to bear, so seedlings serve best as rootstock or for a bit of experimenting.
Stem cuttingsModerate
Warm growing season · Several weeks to root under mist or high humidity
Semi-hardwood cuttings, the firm young stems of the season, are taken in the warm growing season and rooted with bottom heat and a rooting hormone. Several weeks under mist or steady humidity draw out the roots, and each rooted cutting keeps the exact traits of the tree it came from.
Air layeringModerate
Warm growing season · Roots in about 6 to 10 weeks before severing
Air-layering copies a cultivar true to type. Worked on a chosen branch in the warm season, the wrapped, girdled section pushes out roots over roughly 6 to 10 weeks, and only when those pale roots fill the wrap is the branch severed to stand as its own plant.
GraftingDemanding
Warm season onto vigorous seedling rootstock · Unions establish over several weeks
Grafting is the standard commercial route for named cultivars and the surest guarantee of fruit quality. A scion joined to vigorous seedling rootstock in the warm season fuses at the union over several weeks as the tissues knit.
Myths
The idea circulates that guava needs grafting or a nearby second tree to pollinate before fruiting.
Guava is largely self-fertile, so even a lone seedling sets fruit with no second tree beside it. Grafting still has its place, locking in a chosen cultivar and drawing the tree into fruit sooner. One tree bears on its own, without a partner.