Chia Seeds

Chia (Salvia hispanica) is a flowering plant in the mint family, grown for its tiny, nutritious seeds. Native to Mexico and Guatemala, it was an important food crop for the Aztecs and is now eaten all over the world in puddings, drinks, and baked goods.

Scientific Classification & Quick Facts

Common name	Chia
Scientific name	Salvia hispanica
Kingdom	Plantae
Phylum	Tracheophyta
Class	Magnoliopsida
Order	Lamiales
Family	Lamiaceae
Genus	Salvia
Type	Annual herb in the mint family
Native range	Southern and central Mexico, Guatemala
Colours	White or purple flowers; mottled seeds
Height	Up to 1.75 m
Edible parts	Seeds, and leaves for tea
Special feature	Seeds rich in omega-3, fibre, protein

History

People in what is now Mexico and Central America have eaten chia for thousands of years. By the time of the Aztec Empire, chia was a major crop, grown alongside maize (corn), beans, and amaranth. A 16th-century Aztec document called the Codex Mendoza shows that towns paid part of their tribute (a kind of tax) to the Aztec rulers in chia seeds.

The Aztecs mixed chia seeds with water to make drinks, ground them into flour, and pressed them for oil. The word “chia” comes from the Aztec language, Nahuatl, and is thought to mean “oily.”

Chia is still part of traditional food today. The Raramuri (Tarahumara) people of northern Mexico, famous for running very long distances, make a drink called iskiate from chia seeds, water, a squeeze of lime or lemon, and a little sweetener. In Mexico, a similar drink called chia fresca is popular on hot days.

What the Plant Looks Like

Chia is an annual herb in the mint family, which means it lives for one growing season. Like other mints, it has square stems and leaves growing in opposite pairs. The plant can reach about 1-1.75 meters (3-5.7 feet) tall.

Its leaves are about 4-8 cm (1.6-3.1 in) long and 3-5 cm (1.2-2 in) wide. At the ends of the stems, it produces spikes of small purple or white flowers. Each flower makes tiny oval seeds about 1 mm across. The seeds are usually mottled gray, black, and brown, though some varieties are white.

Where Chia Grows

Wild chia grows in central and southern Mexico and in Guatemala, mostly on sunny hillsides. Today it is farmed in many warm countries, including Mexico, Bolivia, Argentina, Paraguay, and Australia.

Chia is a short-day plant: it only starts flowering when days get shorter in late summer and fall. That is why it is grown mainly in warm regions closer to the equator. In places with early frosts, the plant may be killed before its seeds have time to ripen.

Growing Chia at Home

Soil

Chia grows well in light, well-drained soil, from sandy soil to loam. It does not need rich soil and can cope with dry spells once it is established. Heavy, soggy soil is its biggest enemy, as wet roots can rot.

Planting

Sow chia seeds outdoors in a sunny spot after the last frost, when the soil has warmed up. Scatter the seeds on the surface and rake them in very lightly – they only need a thin covering of soil. Seeds sprout best at about 70-85 degrees F (21-29 degrees C), so if you start them indoors in spring, a warm windowsill helps.

You can also grow chia as microgreens. Sprinkle seeds on a damp paper towel or a shallow tray of soil, mist them every day, and in about a week you’ll have tiny green sprouts with a fresh, slightly peppery taste for salads and sandwiches.

Watering

Keep the soil lightly moist while the seeds sprout and the seedlings get started. Mist or sprinkle gently so the tiny seeds don’t wash away. Once the plants are growing well, water only when the top of the soil feels dry. If you grow chia in pots, don’t let water pool in the saucer underneath.

Pests and Problems

Chia has strongly scented leaves, which help keep many insects away, so it usually has few pest or disease problems. This makes it easy to grow without pesticides. The main things to watch for are overwatering, slugs nibbling young seedlings, and frost in the fall.

Chia as Food

Chia seeds are packed with nutrients. They contain fiber, protein, healthy fats (including a plant form of omega-3 fat), and minerals such as calcium and magnesium.

When you soak chia seeds in water, milk, or juice, they soak up the liquid and form a jelly-like coating. This makes them great for:

• Chia pudding, made by soaking seeds in milk overnight
• Thickening smoothies, jams, and drinks
• Sprinkling on yogurt, oatmeal, and salads
• Mixing into bread, muffins, and other baked goods

Safety tip: Always eat chia seeds soaked or mixed into wet food, and don’t swallow a spoonful of dry seeds and then drink water. Dry seeds swell up quickly and could get stuck in your throat.

Chia leaves have also been traditionally used to make tea. Some people believe chia has special health benefits, but scientists are still studying these claims. If you want to use chia for a health reason, ask a doctor first.

Chia FAQs