(70-85 days. Porophyllum ruderale) Papalo is a fabulous, but still relatively unknown, ancient Mexican herb you should be growing. A heat-loving alternative to cilantro, its flavors are both bolder and more complex. It has been described by some as somewhere between arugula, cilantro and rue; others say it tastes like a mixture of nasturtium flowers, lime, and cilantro. Younger leaves are milder flavored, gaining pungency and complexity as they mature. May self-sow in warm areas.