Heartleaf skullcap blooms from April to May in Central Florida.
Since heartleaf skullcap blooms from the bottom of the raceme upwards the seed capsules ripen in the same way. The lowest seed pods will begin to open and spill out their seeds while there are still several blooms at the top of the raceme that have just opened. Individual seed pods are ¼” long by 3/16” wide.
Heartleaf skullcap occurs rarely in nature in Florida and has only been documented growing in the wild in two counties. However, it is native to Alabama, Arkansas, Florida, Georgia, Illinois, Kansas, Kentucky, Louisiana, Missouri, Mississippi, Oklahoma, and Texas. It occurs naturally in rocky woodlands.