Species floss flower
light-purple flowers with lime leaves and stems

floss flower

Ageratum houstonianum 'Blue Horizon'

Floss flower (Ageratum houstonianum 'Blue Horizon') is an amazing plant that adds a burst of blue and purple hues to any outdoor space. Its short and fluffy branches are covered with soft, downy petals, giving this flower a unique look. The petals on this flower also remain in full bloom for an extended time, making it an eye-catching addition to any garden or balcony. Floss flower is also a great choice for butterfly gardens, as its cloud-like petals are a perfect landing spot for butterflies in search of nectar. Lastly, floss flower is an easy care plant and is low maintenance, making it perfect for novice and experienced gardeners alike.

Cycle:

Annual

Watering:

Average

Propagation:

Stem Propagation,Division,Layering Propagation,Seed Propagation

Hardiness Zone:

2 - 11

Flowers:

Medium blue Flowers In Summer

Sun:

part sun/part shade,full sun

Soil:

Well-drained

Fruits:

blue,brown Fruits In Autumn Ready In Fall

Leaf:

Yes

Leaf Color:

purple

Growth Rate:

Low

Maintenance:

Moderate

Care Level:

Medium

watering

This floss flower species should be watered lightly and infrequently, with the soil remaining slightly moist throughout the growing season. In general, it is best to water the floss flower at least once a week, or when the top 1-2 inches of soil feels dry to the touch. During especially warm or hot weather, more frequent watering may be needed. Always check the soil moisture before you water the plant, as overwatering can cause numerous issues, such as root rot or other disease.

sunlight

Ageratum houstonianum 'Blue Horizon' flourishes in full to part sun with at least 4-5 hours of sun each day. It does best in morning sun and afternoon shade, or if grown in a container, it can take up to 8 hours sunshine each day. This plant, native to Mexico and Central America, does not tolerate very hot and dry conditions, so it is recommended to keep this plant out of direct sunlight during the peak heat of the day. For optimal blooms, grow this plant in an area that receives dappled light throughout the day.

pruning

Floss Flower (Ageratum houstonianum ‘Blue Horizon’) should be pruned once a year in early spring before new growth emerges. Pruning helps the plant produce more branches and blooms, and it encourages a more mounded shape. To prune, cut back the stems to about 4 inches above the soil level. Remove any dead, damaged, or weak stems, and clean up any faded flowers.

Season

Fall
Winter
Spring
Summer
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Starts Flowering

Floss flower typically starts flowering in late spring or early summer, usually in May or June.

Starts Flowering

Floss flower typically starts flowering in late spring or early summer, usually in May or June.

Harvest Fruit

The best time to start harvesting the fruits from Ageratum houstonianum 'Blue Horizon' is usually in July and August.

Hardiness Map