How to Plant, Grow, and Care for Allspice Trees
The allspice tree produces both edible seeds used as spices, and leaves to add flavor to your dishes when fresh. In this guide, Sarah Jay shares more about how to grow and care for them.
Contents
The allspice tree is a lovely tree on its own and provides dried berries that make everyone’s favorite fall flavor: allspice. It is the only spice crop grown exclusively in the western hemisphere, and provided you have the right conditions, you can grow it at home too!
Allspice originates in Central America, South America, and the Caribbean. In these tropical areas, growers cultivate regional allspice trees that have distinct flavors. Each region has specific culinary uses for the dried berries, and the result is an aromatic cuisine that is unforgettable.
So what do allspice trees need to thrive? And how can home growers outside its tropical range help their trees produce and harvest berries? Keep reading, and we’ll cover all of that and more, including where the name allspice comes from.
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Round Metal Raised Garden Bed Kit – 15” Tall
Quick Care Guide
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Scientific Name
Pimenta dioica
Days to Harvest
90 to 150 days
Light
Full sun to part shade
Water
1 inch per week
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Soil
Loose, well-draining
Fertilizer
Balanced, high phosphorous powder every 5 weeks
Pests
Mealybugs, whiteflies, aphids
Diseases
Rust, powdery mildew, bacterial crown gall
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All About The Allspice Tree
The allspice tree (Pimenta dioica) is commonly referred to as Jamaican pepper, myrtle pepper, pimenta, pimento, pimenta gorda, Jamaican allspice, Mexican allspice, and Guatemalan allspice. It was first cultivated by the Maya and Aztec peoples in Central America, circa 2600 BC and 1250 AD, respectively. The name allspice came about because the flavor of the dried berries is similar to cloves, cinnamon, and nutmeg. There is only one species of allspice in the world.
Pimenta dioica is a tropical, ornamental, evergreen shrub in the myrtle family that grows up to 59 feet tall. The tree’s bark is white-grey and peels in sheets like that of birch trees. The root system is deep and spreads wide. Allspice leaves are dark green, oblong, and leathery, with high aromatic content. In mid-summer, the trees grow small white flowers on pyramidal stems that produce pea-sized green berries.
Allspice trees are either male or female, and growers should encourage cross-pollination to produce berries. The clustered berries are removed when still green for access to the delicious allspice flavor. They are then sun-dried on concrete until dark red and ground into allspice. It takes roughly three to five months for berries to form after the trees are pollinated.
Native Area
Allspice trees are native to Central America and the West Indies, specifically Jamaica, Mexico, Belize, Guatemala, Honduras, Brazil, and the Leeward Islands. Allspice was historically used to preserve meats in the Caribbean, particularly Jamaica. It’s cultivated as a key ingredient in jerk seasoning, barbecues, curries, and stews. The spice is also popular in German and British cooking and is combined with nutmeg to make pumpkin pie spice in the US.
Uses
Allspice tree leaves are used with smoked meats to provide a woodier, less intense flavor and aroma. The leaves lose flavor within a couple of days, so they must be harvested and used right away. Cooking with allspice and a combination of other dried spices can fill your kitchen with a pungent aroma that you’ll seek out often.
Planting
To encourage cross-pollination, acquire two allspice saplings, one male and one female, from a nursery. In tropical areas in early fall after the first rain, find a spot in your garden with loose, well-draining soil. Ensure the area gets full sunlight for at least 40% of the day, but provide shade in the late afternoon. A clay container will keep the root system healthy. Plant new trees out of cold and wind.
If you live in tropical areas, grow trees in the ground. Dig a hole two times wider than each tree’s root ball and just slightly deeper than the nursery pot. Remove them from the nursery pot and place the root system in the hole. Add water, filling the hole slightly, then add well-moistened soil and mound it up around the base of the trees. Spread mulch around the base of your pimenta plant.
If you have a source for allspice berries, remove the berry husk and extract the seeds. Soak them in water for 24 hours and plant them in well-moistened soil. They’ll sprout within six weeks. Fertilize each of the trees and either plant them in large containers when they’re mature or plant them in the ground. Follow the same steps for planting young trees in containers as you would for planting them in the ground.
How to Grow
Once each tree is planted, you’re on your way to using allspice plants for various culinary uses. Let’s discuss the basic care techniques for this plant in the myrtle family, so you can enjoy it in your garden and your kitchen.
Light
Allspice needs full sun to partial shade, with at least six hours of full morning light per day. Established trees do just fine in shadier spots, but young trees need full daytime sun. Hard afternoon light can singe the foliage, so be sure to shade the tree in the afternoon.
Water and Humidity
Allspice is native to areas with naturally well-moistened earth. Keep the growing medium moist but not waterlogged. Give young trees water daily with either drip irrigation or soaker hoses. A tree in a container will likely need more water than one growing in the ground. Ensure the top two inches of the growing medium are moist before adding more water.
If you don’t have access to drip irrigation or soaker hoses, a low, slow stream from a hose or watering can will do. When it rains, there is no need to water.
Soil
Allspice prefers well-draining average media of almost any type. In its native range, the plants grow in many different types of terrain. If you live somewhere with compacted soil, amend it before planting your tree with average garden media and agricultural sand. Use the same standard for containers. The optimal pH to grow allspice is 6.1 to 7.8.
Temperature
Allspice is hardy in zones 10 and 11, where temperatures do not often dip below 40°F (4°C). Established trees will survive snap freezes down to 26°F (-3°C). In areas outside its hardiness range, grow the trees in containers and bring them in or place them in a climate-controlled greenhouse when temperatures are consistently below 40°F (4°C). Too much exposure to cold damages the tree and eventually kills it.
Fertilizing
When you plant each tree, add slow-release tropical plant fertilizer in powder form to the hole and water it in. Add more tropical plant fertilizer around the base of the plant every three to five weeks. If you don’t have access to tropical plant food, general plant food is satisfactory.
The ideal NPK for allspice plants is 20-180-50 in the first year, then move to 300-250-750 after 15 years. Note that these NPK ratios are based on horticultural standards for growing allspice. Tropical plant food works just as well.
Pruning
In spring and summer, after three years of growth, prune allspice trees either to maintain shape or keep them small if you’re growing indoors. The tree can be pruned from the base up to give it a bushier appearance.
Remove any low-lying branches to give the canopy a more conical look. Remove branches that are damaged or cross one another to give allspice the room it needs to grow. Allspice will not lose its leaves in winter, and fruit will drop from the tree naturally. To prevent dropped berries from sprouting, collect them as quickly as possible.
Propagation
We briefly discussed how to plant allspice berries to produce new plants in an earlier section. You can also grow new plants from cuttings and via air layering.
Use pruning shears to remove about six inches of the current year’s growth and remove the bottom three sets of leaves, allowing the top two to three to remain. Dip them in rooting powder and place them in starter media in starter pots. In two months, they’ll produce new growth and can be transplanted.
To air layer allspice, cut partially through a branch with new growth in spring and wrap it in moist moss. When new roots poke out of the moss, prune below the root and transplant the cutting in your garden.
Harvesting
Once you’ve cared for your allspice plants and helped them produce fruit, it’s time for harvest. Then you can use the pimento seeds with other spices like cloves, nutmeg, cinnamon, chili powder, and curry. You can even use the leaves in conjunction with the fruit.
Harvest the fruits when they’re large enough but still unripe and green, much like juniper. Look for green fruits that are ⅛ to ¼ inch in size. Handpick the unripe fruit and place them in a basket or bag. Set the berries on a dry surface in the sun to dry. When they are dark red, they’re ready to be stored with your other spices.
Separate some of the berries to use as seeds for sprouting new allspice saplings. Rub them against a sieve to release the seeds within. Leaves should be harvested and used immediately and can be taken from the tree as soon as they reach the desired size. Some plants produce fruit at three years, while others take five to six years.
Storing
Store dried berries whole in an airtight container for three to four years. Ground allspice is used to preserve meats or is combined with clove, cinnamon, nutmeg, and other delectable spices, but ground allspice loses potency quickly. Grind them only just before cooking.
Pimenta leaves will not store and should be used in cooking immediately, in combination with other spices like clove. Store the pimenta berries in a dark, cool area.
Troubleshooting
Pimenta may sometimes show a sign or two of difficulty. Practicing integrated pest management combined with careful observation will keep maintenance light, so you can use harvested pimenta in cooking for many years to come.
Growing Problems
If you grow allspice in compacted earth, the root system will not have adequate room to absorb nutrients and will drop flowers, preventing you from harvesting sun-dried berries and seeds. Transplant a young tree into a rehab container if the earth is too compacted.
When you don’t water your pimenta enough, it can stress the tree and make it more susceptible to pests and disease, limiting your ability to harvest dried berries for cooking.
If your pimenta is subjected to cold and develops black-tipped branches and leaves, cold damage has set in. Prune the damaged parts and move the allspice into a climate-controlled area.
Spread fertilizers at least every five weeks, or allspice will show symptoms of nutrient deficiency.
Pests
Although allspice doesn’t have many significant pests, mealybugs, whiteflies, and aphids sometimes feed on the sap of leaves and plant matter. Mealybugs look like tiny cotton balls, aphids have pear-shaped bodies, and whiteflies are tiny gnat-sized moths.
Treat aphids and whiteflies with a strong stream of water from a hose. Ladybugs and lacewings will eat them, too. All three pests can be treated with neem oil spray, but do not use it during the flowering phase, as this deters beneficial pollinators.
Diseases
Rust is a fungal disease that appears on the bottom leaves of allspice. The first sign is white lesions. They take on a green tinge and then blacken the leaves, causing defoliation. Prevent rust by providing proper drainage and spreading mulch around the base of your pimenta. There is no treatment for already infected foliage, so remove any leaves with signs of rust. Spray the remainder of the tree with a copper-based fungicide to prevent further spread.
Powdery mildew is a fungal disease that congregates on the leaves of plants in cool, wet weather. Remove affected leaves as they appear. If leaves fall, the disease has progressed significantly. Prevent powdery mildew with copper fungicide sprays or neem oil.
Bacterial crown gall causes large masses to form at the base of pimenta and on the roots. A gall at the trunk is the first sign, and progression of the disease can cause wilting and total death. There is no effective treatment for crown gall, so prevention is key. Many established tree species can live with crown gall for quite some time, but you will need to destroy any infected material. Do not compost those materials.
Frequently Asked Questions
Are allspice leaves edible?
They are! Harvest and use them as needed.
Can I eat allspice berries?
Yes, but dry and grind them first.
