Ageratum
ANNUALS
AGERATUM
What is an Ageratum?
For those new to flower gardening, you may be wondering, “What is ageratum and how is it cultivated?” Ageratum houstonianum, a native of Mexico, is among the most commonly planted ageratum varieties. Ageratums offer soft, round, fluffy flowers in various shades of blue, pink or white—with blue being most common.
The above information is taken from the below link;
** http://www.gardeningknowhow.com/ornamental/flowers/ageratum/growing-ageratum-flowers.htm**