I planted mine about.a year ago from a gallon sized pot from the nursery. Has doubled in size. Planted in mostly sun. Despite the constant rains last spring and the August drought, it had done quite well. Blooms sporadically. Planted near it are a few daylilies that have dwindled in size during the August heat and a named agapanthus that rotted in the May rains. But the heartleaf has steadily increased in size thru the summer. Can't wait til it fills up the area available to it. Mine is now about 12" tall and sprawls out maybe 24" across. I like this plant.....doesn't reseed like crazy like some and it withstands the weather extremes here (heat and rain).
