Arrowroot
Maranta arundinacea
Arrowroot (Maranta arundinacea) is a tropical perennial herb in the Marantaceae family, prized for its starchy rhizomes that yield one of the purest, most easily digestible starches known to science. Arrowroot starch has been used for centuries as a thickening agent, a weaning food for infants, and a remedy for digestive ailments — a gentle, almost medicinal food that earned the plant its name from the Arawak people who used it to treat arrow wounds.
• Produces one of the most easily digestible starches of any plant — still recommended for infants and the elderly
• The name "arrowroot" may derive from the Arawak word "aru-aru" (meal of meals), or from its historical use treating poisoned arrow wounds
• Native to the Caribbean, where the Arawak and Carib peoples first cultivated it
• Arrowroot starch is uniquely clear and glossy when used as a thickener
• The genus Maranta honors Bartolomeo Maranta, a 16th-century Italian physician and botanist
Taxonomie
• Originated in the West Indies and the eastern Caribbean coast of Central America
• Cultivated by the Arawak and Carib peoples of the Caribbean for millennia before European contact
• Introduced to Europe by early Spanish and Portuguese explorers
• Became an important commercial crop in the 18th and 19th centuries, particularly in St. Vincent and the Grenadines (which remains the world's premier arrowroot producer)
• Also historically cultivated in Bermuda, Jamaica, and the Philippines
• First described by Linnaeus in 1753
• Production has declined significantly since the advent of cornstarch, but artisanal production continues in the Caribbean
Rhizomes:
• Fleshy, cylindrical, tapering, typically 15 to 30 cm long and 2 to 4 cm in diameter
• Covered in thin, papery, scale-like leaves
• Flesh is white, firm, and very starchy
• Produces the commercially valuable arrowroot starch when processed
• Rhizomes grow in clusters from the base of the plant
Leaves:
• Large, broadly lanceolate to elliptical, 15 to 30 cm long and 5 to 10 cm wide
• Bright green with a slightly paler underside
• Distinctive sheathing petioles with a pulvinus (joint) that allows leaves to orient toward light
• Leaves fold together at night, a characteristic behavior of the Marantaceae family
Flowers:
• Small, white, in loose, branched panicles on stalks 15 to 30 cm tall
• Each flower has three petals and is approximately 1 to 1.5 cm long
• Not showy; flowering is sporadic in cultivation
Plant Size:
• Typically 60 to 120 cm tall
• Forms dense clumps 50 to 80 cm wide
• Per 100 g arrowroot starch: approximately 340 kcal (pure carbohydrate)
• Almost pure carbohydrate — over 80% starch by weight
• Extremely easy to digest — recommended for infants, the elderly, and those recovering from illness
• Very low in protein, fat, and fiber — essentially pure starch
• Gluten-free — one of the original gluten-free thickening agents
• Contains small amounts of potassium, iron, and B vitamins
• Has a soothing effect on the digestive tract
• Low allergenicity — rarely causes allergic reactions
• Used medically as a bland, easily assimilated carbohydrate for people with gastrointestinal disorders
• The starch forms a clear, glossy gel when cooked — valued in food preparation
Planting:
• Propagated from rhizome pieces, each with at least one bud
• Plant 5 to 10 cm deep in ridges or mounds at the start of the rainy season
• Space 25 to 40 cm apart in rows 60 to 90 cm apart
Growing:
• Requires warm, humid tropical or subtropical conditions
• Prefers partial shade to full sun
• Requires well-drained, fertile, loamy soil with consistent moisture
• Takes 6 to 12 months to produce harvestable rhizomes
• Benefits from heavy mulching
• Relatively pest-free
Harvest:
• Harvest when leaves begin to yellow and die back, typically 8 to 12 months after planting
• Dig carefully to extract the cluster of rhizomes
• Process promptly for best starch yield
Processing:
• Wash rhizomes thoroughly and peel
• Grate or crush the rhizomes to release starch
• Wash starch through sieves with clean water
• Allow starch to settle, then dry in the sun
• The resulting powder is fine, white, and silky arrowroot starch
• Traditional processing is labor-intensive but produces the highest quality starch
Culinary Uses:
• Used as a thickening agent for sauces, gravies, puddings, and pie fillings — produces a clear, glossy sheen
• Preferred over cornstarch for delicate sauces and fruit fillings as it doesn't turn cloudy
• Used in baking as a gluten-free flour alternative or additive
• Traditional infant weaning food in many cultures
• Used to make cookies, biscuits, and crackers ("arrowroot biscuits" are a classic product)
• Thickens at lower temperatures than cornstarch, making it ideal for heat-sensitive preparations
• Does not break down in acidic conditions as readily as cornstarch
Other Uses:
• Used medically as a easily digestible carbohydrate for patients with digestive disorders
• Applied topically as a poultice for wounds, rashes, and skin irritations
• Used in the cosmetics industry as a talc substitute in body powders
• Employed in paper manufacturing for coating high-quality papers
• Used in forensic science for developing latent fingerprints
• Historically used to treat arrow-wound poisoning by Caribbean indigenous peoples
Anecdote
St. Vincent and the Grenadines, a tiny Caribbean nation of just 110,000 people, produces the world's finest and most expensive arrowroot starch — a product so pure that it has been used by NASA and by makers of fine photographic paper, earning the country the title "Land of Arrowroot."
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