Ageratum houstonianum 'Blue Horizon'
Floss flower
Also known as Ageratum 'Blue Horizon'
- Height × spread
- 0.75m × 0.5m
- Position
- Full sun
- Hardiness
- Frost free greenhouse 1C & above (RHS H2)
- Flowers
- Summer, Autumn
Availability
Please ask in store about availability
Many plants are seasonal. Call 01234 567890 to check current stock.
About this plant
This is a neat upright plant with frothy heads of blue flowers. The clusters of flowers look like so many miniature powder puffs and charm the eye with their refined appeal. They are held on upright stems with bell shaped leaves held horizontally. This has a fresh yet demure quality that suits it to the company of elegant rather than exuberant flowers. It is an F1 hybrid which means it wont set seeds.
- Flower colour
- Blue
- Foliage colour
- Green
- Variegated
- No
- Scent
- No
- Shape
- Bell
- Height
- 0.75m
- Spread
- 0.5m
- Season of interest
- Summer
- Flowers in
- Summer, Autumn
- Evergreen
- Deciduous
- Garden style
- Small scale garden, Seaside garden
- Sun or shade
- Likes full sun, tolerates part shade
- Soil type
- Chalk, Loam (normal)
- Soil pH
- All types
- Drainage
- Moisture retentive soil, Well drained soil
- Hardiness
- Frost free greenhouse 1C & above (RHS H2)
- Borders & containers
- Borders
- Use for
- Deer resistant, Bee attraction, Butterfly attraction
- Hazards
- No
Spring
Spring-Autumn · Outdoors
Water in dry periods
Established plants in the ground can cope with 7-10 days of dryness, and shrubs often manage 2 to 3 weeks. Water one section of the garden thoroughly each day rather than a little everywhere. Check plants in pots more often, especially in hot weather.
Summer
Summer - early · Outdoors
Apply slow release fertiliser
Apply a slow release fertiliser which is spread around the root area of the plants soon after they have come into growth. (Or apply a liquid feed at regular intervals throughout the growing season.)
This is a simple way to provide a nutrient boost as a single annual procedure.
Planting & general
Planting
Deadhead blooms during flowering season
Remove flowers as they turn brown and fade. Snip the stem just below the bloom. This will keep the plant tidy and encourage more flowers.
The removal of spent flowers encourages the plant to produce fresh ones, rather than spend its energy on the development of seeds.
Found in
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