Prik Chee Fah

Fresh and slightly sweet, with a grassy snap when green and a fuller, sweeter chili flavor when red. Heat is clean and forward rather than lingering, milder than Thai bird’s-eye and closer to serrano or a mild cayenne.

Prik Chee Fah is a traditional Thai Capsicum annuum landrace grown for slender, tapered spur pods about 8–13 cm long. Fruit often stands upright when young, which gives the variety its name. Unripe pods are green and grassy; they pass through orange and finish bright red, with glossy skin and thin-to-medium walls that dry well. Heat is moderate—typically a few thousand to a few tens of thousands of Scoville units—so cooks use it for color, fragrance, and a clean bite rather than raw fire. Green fruit goes into stir-fries, dipping sauces, and green curry; ripe red fruit is dried and pounded into red curry paste or pickled in vinegar as a noodle condiment. Plants are bushy, productive, and straightforward in tropical or warm-temperate gardens.

Capsicum reached Siam with Portuguese traders after contact at Ayutthaya in the sixteenth century. Thai growers selected a longer, milder, sky-pointing type distinct from the tiny prik kee noo, and it became the country’s everyday spur chili. The name is practical, not a brand: many local strains share it, including thicker-walled Bang Chang fruit from Samut Songkhram and named Department of Agriculture lines such as Phichit. Dried red pods still supply the color of classic red curry.