- Name: Thin Cayenne Pepper - Other Common Names: Long Red Thin Cayenne / Long Slim Cayenne Pepper - Scientific Name: Capsicum Annuum - Color: Red - Plant Seeds: At 80 - 85f - Harvest: 70 Days - Hardiness Zone: Annual - Plant Height: 18 - 24" - Plant Spacing: 12 - 18" - Light Requirements: Sun - Soil & Water Preferences: Average - Quantity: 300 Seeds - Other: Cayenne Peppers Are A Hot Chili Pepper Named After The City Of Cayenne In French Guiana, South America. The Peppers Start Out Green & Mature To Red. They Typically Have A Bit Of A Curl, & Measure 5 - 6" Long & About A 1/2" Across. Cayenne Peppers Are Hot, With An Shu (Scoville Heat Units) Rating Of 30,000 To 50,000. Cayenne Peppers Are Most Commonly Uséd Dried & Ground As The Spice Cayenne Pepper, But Can Be Uséd Fresh In Salsa, Roasted, Or In Any Way You’d Like. The Peppers Store Well, & Can Also Be Frozen. The Plants Are Quite Prolific, & Their Compact Size Makes Them Great For Containers.