Hawaiian Chilli Pepper (Nioi)

Hawaiian Chilli Pepper, locally called Nioi, is a small upright chilli widely grown and used throughout Hawaii. It is considered a long-established Hawaiian landrace but was introduced to the islands in the early 19th century.

Historical agricultural sources state chillies were introduced to Hawaii around 1815. Over time, this type naturalised and became strongly embedded in local food culture.

Pods grow upright and are slender and tapered. They typically measure about 2–7 cm long. Fruit ripen from green to yellow-orange and finally bright red at full maturity. Plants are bushy and commonly grow about 60–120 cm tall in suitable conditions.

Heat reporting varies widely between sources. Many Hawaii-based growers and seed sellers list heat between 50000 and 100000 SHU. Some external produce sources claim figures as high as 200000–250000 SHU. A working value of 75000 SHU reflects a mid-range estimate from commonly cited local grower ranges. There are no clearly published independent laboratory test records tied to a specific documented line.

Nioi is culturally significant in Hawaii and is closely associated with chilli pepper water, a traditional condiment made by steeping the fresh pods in liquid, often with added garlic, vinegar, soy sauce or ginger. It is commonly used on rice, seafood, meats and local dishes.

There is variation in reported plant height and heat between sources, suggesting either environmental influence or multiple similar frutescens lines being grouped under the same common name. No formal cultivar registration or documented breeder record exists.