Conoclinium coelestinum
Mist flower, Hardy ageratum, Blue boneset
Also known as Eupatorium coelestinum
- Height × spread
- 0.9m × 0.6m
- Position
- Full sun
- Hardiness
- Average winter to - 10C (RHS H4)
- Flowers
- 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 quiet looking upright plant with arching long conical leaves, deep veined, arching out from the main stalk. The flowers are held in little clusters, a soft blue shade. It is autumn flowering, and the flowers may be evident well into November. This is a discreet and subtle plant that could easily get lost in the richly coloured autumn show, so place it where its charms will be appreciate. It will thrive in any reasonable well drained soil in a sunny position. This stands around 90cm (3ft) high.
- Flower colour
- Blue
- Foliage colour
- Green
- Variegated
- No
- Scent
- No
- Shape
- Bell
- Height
- 0.9m
- Spread
- 0.6m
- Season of interest
- Autumn
- Flowers in
- Autumn
- Evergreen
- Deciduous
- Sun or shade
- Likes full sun, tolerates part shade
- Soil type
- Chalk, Loam (normal), Poor soil
- Soil pH
- All types
- Drainage
- Moisture retentive soil, Well drained soil, Dry soil, Drought resistant
- Hardiness
- Average winter to - 10C (RHS H4)
- Borders & containers
- Borders
- Hazards
- No
Spring
Spring - late · Outdoors
Feed with slow release fertiliser
Apply a general purpose slow release fertiliser, spreading it around the root area of the plant as it is coming 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.
Spring-Autumn · Outdoors
Water during drought
After three or four weeks without rain, except for drought tolerant plants, those in the ground often get stressed. Adopt the habit of deep-watering one section of the garden each day. Check plants in pots more frequently, especially in hot weather.
Encourage plants to develop good root systems by giving occasional deep watering. Some plants, such as conifers and heathers, do not show much sign of distress so water these if in doubt.