Red Top Ageratum

Ageratum, Red Top

Mistflower is adapted to most soil types, but is especially suited to heavy textured and to highly organic soils. Natural stands are found on moist to wet sites, such as low woods, wet meadows, and ditches. It grows best in full sun, but will tolerate light

A reliable addition to generations of flower beds, ageratums, or floss flowers (Ageratum houstonianum), are covered in fluffy flower heads all summer if deadheaded. These heat-loving annuals do well in sun or partial shade and come in many sizes and colors. While most commonly seen as edging plants, these useful plants suit many areas of the garden.

Plant ageratums in full sun in northern gardens.

In the South and Southwest, where the sun is intense, plant them in afternoon shade.

Use a hand trowel to dig a hole large enough for the root ball and gently spread the roots when planting. Give the plants an initial dose of flowering-plant fertilizer, water well and then spread 2 to 3 inches of mulch over the roots, being careful to keep the mulch 1 inch away from the crown of the plant.

Deadhead spent flowers and fertilize regularly for flowers until frost.
Long-lasting, 3″ flower clusters add texture and interest to mixed bouquets.

Make 2-3 successive plantings for continuous blooms early summer to frost.

Germination: 7-10 days at 75-80°F (24-27°C).
Culture: Indoors (recommended) – 6-8 weeks before last frost. Transplant out after danger of frost is past.
Light/soil: Full sun; rich, well-drained soil.
Spacing: 9-12″. No pinching or support is needed.

Height. 24-30”
Use: Cut or dried flower, back of beds.
Harvest: Fresh – Flower spikes 3/4 open. Dried – Flowers completely open; hang.


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