On this Ageratum deadheading is not necessary for continuous bloom. Plants will "bury their dead" (new flowers will quickly cover old flowers) so no deadheading necessary. Most other Ageratum will need deadheading.
Plant in sun or partial shade.Height 8-12". Spacing 10-12".
Hardy Temp 25°F (-4°C) Use in combinations, window boxes and landscaping
Small, fluffy, blue buttonlike flowers add color all season; no dead heading needed