TROPICAL PLANT ENCYCLOPEDIA
Ageratum houstonianum
FlossflowerFamily: Asteraceae
Origin: Mexico, Belize, and Guatemala
USDA Plant Hardiness Zone Map
As a long-blooming, summer annual, this plant keeps a nice mounded shape throughout its bloom period. It is covered with clusters of small flowers. It comes in blue, pink, and white blooms. It generally grows about a foot high, though some dwarf varieties are available. Mass blue Ageratum is beautiful in beds with yellow marigolds for complementary colors, or with pink begonias to create a soft pastel carpet. Ageratum is very easy to grow in a sunny location.
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Link to this plant:
https://toptropicals.com/catalog/uid/ageratum_houstonianum.htm