About Ageratum Blue Horizon
Ageratum Blue Horizon is an old favorite of mine because it really does everything I want in the garden. The powder blue button blooms grow on 30” strong stems. Cut them for your vase and they still keep coming. We also get lots of butterflies landing on ours especially in the fall during their final migrations. The deer have never bothered our Ageratum and are on the deer resistant lists from the University of Minnesota and Washington State University.
Ageratum Blue Horizon
Planting and Growing Ageratum
Make sure your Ageratum “harden off” to cool nights and windy conditions before planting. This requires leaving them outside in a protected area for a few days otherwise, they may wilt after planting. Choose an area that is sunny or with a little shade. Prepare your planting hole by turning the soil at least a shovel size deep and wide and be sure the hole is filled with plenty of organic matter for best results. Remove your plant from its pack and gently loosen the root ball. Plant deep enough to cover the top of the root ball. Press down firmly on the soil and then water it in. Consider fertilizing once or twice a season. You can mulch if you like but not too close to the plant to avoid rot.