Butterfly enthusiasts know that milkweed is the larval host plant for butterflies in the subfamily Danainae, which includes Monarchs and Queens. In Florida, the most common milkweed available for sale is Asclepias curassavica, known commonly as Tropical Milkweed or Scarlet Milkweed. This species of milkweed is not actually native to Florida, but has naturalized here due to its ability to thrive in our hot and sticky summers. Being a tropical plant, it is not cold-hardy, though it will frequently come back from the roots if you're patient. It also reseeds readily, and also grows easily from stem cuttings allowed to root in water.