Krapow vs Horapha

The single most common error in Western “Thai basil” recipes. They are different plants, different flavors, and not interchangeable.

The short answer

Krapow (holy basil) has peppery, clove-like aroma; it is the basil in pad krapow. Horapha (Thai basil) is anise/licorice-sweet; it is the basil in red and green curries. Shops often sell horapha labeled simply “Thai basil,” and recipes wrongly call for it in krapow dishes.

How to tell them apart

• Krapow: narrower leaves; stems green or purple-tinged depending on variety; fine hairs give the plant a faintly fuzzy look; peppery, clove-like aroma.
• Horapha: broader leaves, purple stems and flowers, smells of anise.

Spelling & pronunciation

The same Thai word gets romanized many ways: krapow, kaphrao, kraprao, kaprao, kra pao, gaprao, gaphrao — all กะเพรา. Likewise horapha, sometimes horapa, for โหระพา. This site uses the most common English spelling for each term and keeps the formal (RTGS) romanization in the page metadata.

One pronunciation trap: the “ph” in kaphrao and horapha is an aspirated p — as in uphill, never as in phone. Say “prao,” not “frao.” (And the g in spellings like gaprao reflects Thai ก, an unaspirated k that sounds close to an English g.)

If you can’t find krapow

There is no clean substitute. If holy basil is genuinely unavailable, Thai basil (horapha) is the usual fallback — but be honest about the trade: you lose the aroma that defines krapow and gain horapha’s sweeter, anise character. What you get is not the same dish, but still tasty. One missing ingredient doesn’t make the effort pointless; it just isn’t the real thing, and saying so plainly is the point.