Jalapeno Organic Pepper Seeds 4152. Thick walled, very pungent dark green fruits average 9 cm (3.5″) long by 4 cm (1.5″) wide. Peppers turn red at maturity. Plants average 60 cm (24″) in height. Makes an eye watering addition to salsa and dips and is also an excellent variety for pickling. Scoville Heat Unit Rating – 6000.