Ageratum

Some seeds, such as ageratum, alyssum, impatiens, petunias, and snapdragons, should not be covered at all because they need light in order to germinate.

A Fight for Flower Power Andy McMillan for The Wall Street Journal Dahlinova Dahlias at Metrolina Greenhouses in Huntersville, N.C. More photos and interactive graphics This year, Home Depot is touting an exclusive "Stellar Blue" ageratum, or floss flower, that hides faded blooms as it grows, requiring less clipping. ❋ Miguel Bustillo (2011)

Spotted sipping on the wild ageratum, Conoclinium coelestinum, is our first image of a monarch butterfly this season. ❋ Unknown (2009)

She is surrounded by the native wild ageratum, Conoclinium coelestinum inherited with the property and planted with bronze carex self sown seedlings. ❋ Unknown (2009)

We started snapping as the butterfly enjoyed the nectar from the wild ageratum, the name of which has changed so many times that the common name will suit our purposes here. ❋ Unknown (2008)

Do you have the wild ageratum, used to be a eupatorium of some sort? ❋ Unknown (2008)

We did best with ageratum and alyssum, impressing neighbors who said nobody had gardened that yard in human memory. ❋ Unknown (2008)

Along the walks ageratum was planted in the following manner to serve as ❋ Ellen Eddy Shaw (N/A)

Often one sees a border of ageratum about such a one. ❋ Ellen Eddy Shaw (N/A)

This was money enough to buy seeds of ageratum, zinnia, dwarf nasturtium, ❋ Ellen Eddy Shaw (N/A)

At the farther end of it, a thick hedge of holly bordered on the roses at right angles to the end of the battlements; while the lawn on his left was spangled with geometrically shaped beds showing elaborate arrangements of heliotrope, ageratum, calceolarias, and other bedding-out plants. ❋ Charles Bryce (N/A)

Border, dwarf blue ageratum; circle, blue lobelia; ground (3 parts), crimson alternanthera. ❋ Unknown (1906)

Such plants as geranium, coleus, alyssum, scarlet salvia, ageratum, and heliotrope may be used for these beds. ❋ Unknown (1906)

-- Border, Oxalis tropæoloides; center, blue heliotrope, blue ageratum, or Acalypha marginata; cross about the center, Thymus argenteus, or centaurea; scallop outside the cross, blue lobelia; corners, inside border, santolina. ❋ Unknown (1906)

"We've decided on ageratum for the border and larkspur and monkshood for the back," said Ethel Brown. ❋ Unknown (1903)

"I should think a low-growing plant like ageratum would be pretty in a vase of that sort." ❋ Unknown (1903)

Most of the plots were given over to vegetables, even those cared for by small children, for the addition of a few extras to the family table was more to be desired than the bringing home of a bunch of flowers, but even the most provident children had the pleasure of picking the white candytuft or blue ageratum, or red and yellow dwarf nasturtiums that formed the borders. ❋ Unknown (1903)

Two forms are in the market -- _E. ageratoides_, bearing numerous small white flowers in late summer, and _E. coelestinum_, with light blue flowers similar to the ageratum. ❋ Unknown (1885)

The soft blue tufts of the ageratum were on each side continually. ❋ George Washington Cable (1884)

Turn back the edges of your tufts of ageratum, and you will find a thrifty set of young ones, – easy to transplant, and sure to grow. ❋ Unknown (1872)