Safflower oil comes from the seeds of the safflower plant (Carthamus tinctorius), a thistle-like crop in the daisy family that thrives in hot, dry climates. Each seed contains 35 to 50 percent oil by weight, making safflower one of the richer oilseed crops. The plant has been cultivated for thousands of years, though oil production is a relatively modern use. For most of its history, safflower was grown for the vivid red and yellow dyes in its petals.
The Safflower Plant
Safflower is an annual herb that grows upright to about two to four feet tall, with stiff, branching stems and spiny leaves. At the top of each branch sits a flower head, roughly the size of a golf ball, packed with bright orange, yellow, or red florets. After the flowers fade, small white seeds develop inside these heads, each one tucked beneath dried petals and protective bracts. Those seeds are the source of the oil.
The plant is adapted to semiarid regions. It does best in warm temperatures with sunny, dry conditions during flowering and seed development, and it cannot tolerate more than about 15 inches of annual rainfall. Young plants can survive temperatures as low as 20°F while still in their early rosette stage, but once the stems elongate, frost can be fatal. Safflower needs at least 120 frost-free days to reach maturity, which typically takes 110 to 170 days from planting depending on the variety and climate.
A Plant Grown for Dye Long Before Oil
Ancient Egyptians were using safflower as a textile dye as early as 4,500 years ago. The plant spread from the Middle East along trade routes into Central Asia and China, arriving in northwest China around the 4th to 3rd century B.C. For centuries, safflower petals were prized for dyeing silk a distinctive, bright red. In imperial China during the Qing Dynasty (17th to 19th century), safflower-dyed fabrics were reserved for high-grade silk, especially garments used in the royal court. The petals were also used in traditional medicine and ground into cosmetic rouge.
Oil extraction from the seeds became the plant’s primary commercial purpose only in the 20th century, as demand for cooking oils and industrial lubricants grew.
Where Safflower Is Grown Today
Safflower is cultivated in roughly 60 countries, though it remains a relatively minor crop globally, with less than one million hectares planted and around 500,000 metric tons produced each year. India is the world’s largest producer, accounting for approximately half of total global output. The United States is the second largest, with California leading domestic production. Other significant growing regions include parts of Central Asia, Australia, and the Middle East, all areas with the dry, warm conditions the plant requires.
Farmers harvest safflower with the same combine machinery used for wheat and other cereals. The crop is typically direct-harvested rather than cut and left in rows to dry first, since laying the plants in windrows can cause seed loss from shattering.
How the Oil Is Extracted
Once harvested, the seeds are cleaned and dried. Oil is then removed through one of two main approaches: mechanical pressing or solvent extraction.
Cold pressing is the simpler method. The seeds are physically crushed under pressure, squeezing the oil out without added heat or chemicals. This preserves more of the oil’s natural flavor, color, and nutrients, but it’s less efficient. Not all the oil can be forced out mechanically, so yields are lower.
Solvent extraction pulls more oil from the seeds. The seeds are ground into a fine powder, then mixed with a solvent that dissolves the oil. The solvent-oil mixture is separated from the seed meal, and then a rotary evaporator removes the solvent at low temperatures under vacuum, leaving behind the crude oil. Temperature, grinding fineness, and extraction time all affect how much oil is recovered. This method is more common in large-scale commercial production because it captures nearly all the available oil from each batch of seeds.
Refining: From Crude Oil to Store Shelf
Crude safflower oil has a strong color and flavor that most consumers wouldn’t find appealing. Refining strips these away in stages. Bleaching removes pigments, peroxides, and residual impurities by passing the oil through absorbent clays. Deodorizing, the final step, uses heat and vacuum to eliminate volatile compounds, off-flavors, and remaining free fatty acids. The result is a neutral-tasting, pale oil with a long shelf life.
The tradeoff is nutritional. Deodorizing can reduce levels of beneficial compounds like tocopherols (a form of vitamin E), sterols, and polyphenols. It can also generate small amounts of trans fats through a chemical process where the natural structure of fatty acids shifts under high heat. Unrefined or cold-pressed safflower oil retains more of these protective compounds but has a shorter shelf life and a more pronounced flavor.
Two Types of Safflower Oil
Not all safflower oil has the same composition. There are two distinct varieties of the plant, bred for different fatty acid profiles.
- High-linoleic safflower oil is rich in linoleic acid, a polyunsaturated fat. This was the original type available commercially. It’s lighter in flavor and commonly used in salad dressings, mayonnaise, and other unheated applications.
- High-oleic safflower oil contains predominantly oleic acid, a monounsaturated fat similar to what’s found in olive oil. Plant breeders developed this variety for greater heat stability. Australian researchers have even created a “super-high-oleic” variety with oleic acid content above 90 percent, designed for industrial and food applications where oxidation resistance matters.
The high-oleic version has become more popular for cooking because monounsaturated fats hold up better under heat. Refined high-oleic safflower oil has a smoke point of about 266°C (510°F), which is higher than most common cooking oils. For comparison, refined peanut oil smokes at 232°C (450°F), canola oil at 204°C (400°F), and corn oil between 230 and 238°C. Only refined avocado oil, at 271°C, consistently exceeds safflower oil’s heat tolerance. This makes safflower oil a practical choice for deep frying, stir-frying, and other high-heat cooking.
From Field to Bottle
The full journey from planting to finished oil spans roughly seven to eight months. Seeds go into the ground in late winter or early spring. The plant spends its first weeks as a flat rosette of leaves close to the soil before sending up stems and eventually blooming. After flowering, the seeds fill and dry on the plant through the warm months. Harvest happens once the plant has fully matured and the moisture content drops low enough for combining, typically 110 to 170 days after sowing.
After harvest, seeds move to processing facilities where they’re pressed or solvent-extracted, then refined if intended for the mass market. The hull fraction, which makes up 35 to 45 percent of the seed, and the protein-rich meal left after oil extraction are used as livestock feed. Very little of the safflower seed goes to waste.