Jalapeño Mammoth – Big, Juicy, and Full of Flavour A prolific producer, Jalapeño Mammoth yields large, thick-skinned pods (7–9 cm long, 3–4.5 cm wide) that ripen from green to red, often with attractive corking. With a sweet, juicy taste and a fiery kick, it’s perfect for stuffing or poppers. Grows 60 cm in pots, larger in the ground.