I grew Papalo last summer. It was an interesting plant with unusual blooms and prolific seed production. It endured the heat and humidity well.
I was hoping for a summer substitute for Cilantro which I love. I didn't much care for the taste of Papalo and won't grow it again although I am expecting some volunteers from fly away seeds.
I did save seed and will share if anyone wants to try some. I will be interested to hear how others feel about this herb.