Description
The Borg 9 Mustard is a rare mustard-coloured variant of the original Borg 9, a superhot pepper developed in the UK by breeder Jon Harper from a cross between a Naglah and a 7 Pot Bubblegum. Like the red Borg 9, it is renowned for extreme heat, heavy pod production, and a distinctive gnarly appearance.
The Borg 9 Mustard is a rare mustard-coloured variant of the original Borg 9, a superhot pepper developed in the UK by breeder Jon Harper from a cross between a Naglah and a 7 Pot Bubblegum. Like the red Borg 9, it is renowned for extreme heat, heavy pod production, and a distinctive gnarly appearance.
Appearance
Pods are medium to large, typically 5–7 cm long.
Highly wrinkled and bumpy with a rugged “superhot” texture.
Often develops a pointed “stinger” tail.
Ripens from green to a rich mustard-yellow colour with golden and olive tones.
The plant is vigorous, reaching around 1–1.2 m tall and producing abundant fruit.
Heat
Generally estimated at well over 1,000,000 Scoville Heat Units (SHU).
Delivers a rapid, intense burn that spreads across the tongue, throat, and lips.
The heat is long-lasting and can rival many of the hottest peppers in cultivation.
Flavour
Before the heat arrives, the Borg 9 Mustard offers:
Strong tropical fruit notes
Citrus and floral undertones
Earthy, slightly savoury mustard-pepper character
A rich aroma that many growers consider superior to the standard red phenotype.
Growing Characteristics
Capsicum chinense species.
Requires a long growing season for best yields.
Produces heavily in greenhouse or warm outdoor conditions.
Plants are robust, with large leaves and strong branching.
Summary
The Borg 9 Mustard combines the brutal heat of the Borg 9 line with a striking mustard colour and a complex fruity flavour profile. It is one of the more sought-after mustard superhots among chilli enthusiasts because it balances extreme heat, excellent productivity, and attractive pod appearance. Many growers rank it among the best mustard-coloured superhot peppers available.





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