Jalapeno Organic Pepper Seeds 4152. Thick walled, very pungent dark green fruits average 9 cm (3.5â€³) long by 4 cm (1.5â€³) wide. Peppers turn red at maturity. Plants average 60 cm (24â€³) in height. Makes an eye watering addition to salsa and dips and is also an excellent variety for pickling. Scoville Heat Unit Rating â€“ 6000.