| Description | A larger Ageratum with blue to purplish blue flowers. |
|---|---|
| Pronunciation | (a-jer-A-tum)(hew-so-nee-AH-num) |
| Plant Type | All Plants, Annuals |
| Sunlight | full |
| Moisture | average, may need additional moisture during dry spells |
| Soil & Site | average, well drained |
| Temperature | a tender garden annual turning black at the first frost, planting sooner than Memorial Day weekend may be risky (zone #5). |
| Flowers | small 1/4-1/2" flowers are in clusters forming a fluffy ball, purplish-blue |
| Dimensions | listed to get taller than 2 foot, I have never seen that in my gardens |
| Maintenance | As the flowers die they need to be dead headed which is no easy task. Many of the cultivars flowers are on short scapes and are hard to remove. This is one plant I don't enjoy the task of dead heading |
| Propagation | small seeds should be start 6-8 weeks before they are going to be planted in the garden. |
| Native Site | Native to Mexico and Central and South America |
| Misc Facts | Named after William Houston who collected the species in the Antilles and Mexico. |
| Author's Notes | Ageratum were one of my main plants I used in commercials gardens. They were blue, short and hardy. Easy to grow and maintain. |
| Notes & Reference | #27-Rodale's Annual Gardens (Paul Loewer), #28-Cottage Garden Annuals(Clive Lane), #51-Armitage's Manual of Annuals, Biennials, and Half-Hardy Perennials (Alan Arimitage), #109-Annuals and Tender Perennials for North American Gardens (Wayne Winterroud) |
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