Conoclinium is a hardy native perennials. It’s also know as Hardy Ageratum and Blue Mist Flower. It’s blooms are fuzzy clusters of tubular disc flowers in shades of blue to sometimes purple similar to the annuals ageratum found in garden centers all over the country. The plants are tall at around twenty-four inches and spread via a rhizome root system. These rhizomes can in the right conditions spread quite a lot to form a colony of plants.

Conoclinium coelestinum (previously call Eupatorium coelestinum) is native to the Southern states. It does best in moist, wooded areas where it can spread out via the rhizome roots. It can take over other plants under these conditions. It is not recommended for smaller planting areas.

The Hardy Ageratum blooms in the late summer to early fall. It is a showy fall flower that can bloom for up to eight weeks. It provides a great source of pollen to pollinating insects. The plants contain alkaloids that some male butterflies need to produce pheromones. These same alkaloids make the plants bitter and unappealing to deer and other foraging animals.

Plant in full sun to part shade. Conoclinium grows 24-36″ tall and 24″ wide.

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