Safflower

Safflower (Carthamus tinctorius), called kusum across Pakistan, is the spiny thistle-like oilseed that thrives where canola and toria run out of water. POWO records it as native to Central and Eastern Türkiye through Iran, accepted as a temperate annual now grown across the dry world for oil, dye and animal feed.¹ For a Pakistani grower on a marginal Sindh, southern Punjab or Balochistan plot, safflower is the oilseed that takes the place of canola when irrigation is short.

Where it thrives

Safflower is a deep-rooted dryland crop. Feedipedia notes it grows from sea level to about 1800 m with cool temperatures (15 to 20 degrees) in the rosette stage and warmer 20 to 30 degree weather through stem extension and flowering, and may grow on as little as 300 mm annual rainfall in still air.² In Pakistan it suits the rainfed Pothohar plateau, the cooler highlands of Balochistan and the marginal lands of the Punjab plains and Sindh coast, sown October to mid-November and harvested in late April or May. The taproot reaches 2 m and pulls water from depths most other rabi oilseeds cannot reach.³

Role in the system

Safflower sits in the secondary stratum as a pioneer annual groundcover with a tall, spiny habit at maturity. Its long taproot opens compacted subsoil and lifts deep moisture and nutrients, which is why it is widely used as a break crop on saline or drought-stressed ground. The orange thistle-like heads carry nectar for honeybees through April, and the spiny canopy gives some grazing protection to whatever is planted under it. It does not fix nitrogen and is a heavy water-user once the taproot is established, so use it where rainfall is the limit, not the irrigation tap.²

Growing it

Decisions worth getting right. Sow 15 to 25 kg of seed per hectare into a firm, moist seedbed about 3 to 4 cm deep, in rows 30 to 45 cm apart; deeper sowing than canola because the seed is larger and emergence is slow in the cold. Use a Pakistani-released or NARC line rather than imported types, which differ in spininess and oil content.³ One or two early irrigations through tillering are enough on the Pothohar plateau; rainfed crops manage on stored profile moisture. The rosette stage tolerates short cold dips, but flowering plants are frost-sensitive, which sets the harvest window.³ Wear gloves at harvest; the bracts spike hard.

What you get

Rainfed Pothohar or Balochistan plots typically turn in 500 to 1000 kg of seed per hectare; irrigated land can carry 2000 kg/ha or more.³ Seed oil content runs 30 to 45 percent, dominated by linoleic acid in standard types and by oleic acid in the new high-oleic cultivars; modern pharmacological reviews link safflower extracts to antioxidant, anti-inflammatory and cardiovascular-protective activity.⁴ The dried florets give the cheap saffron-substitute dye called kusumbha, traded into northern Sindh kitchens and dye baths for centuries. The seed cake at 15 to 20 percent crude protein is a goat and sheep feed once dehulled.²

Sourcing notes

Buy fresh seed each season from a NARC-licensed dealer; spineless food-type cultivars are available and easier to handle. Slot safflower after a kharif legume such as guar or moong to bank nitrogen, and avoid following any other Asteraceae such as sunflower or niger in the same bed to dodge shared Alternaria and rust pressure. Honeybees pay off the flowering window.

Sources

1. Royal Botanic Gardens, Kew (2024). “Carthamus tinctorius L.” Plants of the World Online.
2. Feedipedia (2024). “Safflower (Carthamus tinctorius), seeds.” INRAE, CIRAD, AFZ and FAO.
3. Utah State University Extension (2024). “Growing Safflower in Utah.” Utah State University Extension.
4. Meng, Q. et al. (2022). “A Network Pharmacology Study to Explore the Underlying Mechanism of Safflower (Carthamus tinctorius L.) in the Treatment of Coronary Heart Disease.” Evidence-based Complementary and Alternative Medicine.