Celmisia semicordata
Silvery cotton plant, Cotton plant
Also known as Celmisia coriacea
- Height × spread
- 0.3m × 0.3m
- Position
- Full sun
- Hardiness
- Frost free greenhouse 1C & above (RHS H2)
- Flowers
- Summer
Availability
Please ask in store about availability
Many plants are seasonal. Call 01234 567890 to check current stock.
About this plant
These lovely plants have foliage of such quality that they are hard to resist. This is a beautiful and unusual form with long, broadly linear leathery leaves that are coloured a blue green with a narrow white edge and white fur on their underside. The flowers are large white daisies with big yellow centres and they appear in early summer. Celmisia are rarely seen, perhaps because they are difficult to grow, and they are not long lived.
- Flower colour
- White
- Foliage colour
- Green
- Variegated
- No
- Scent
- No
- Shape
- Dome
- Height
- 0.3m
- Spread
- 0.3m
- Season of interest
- Summer
- Flowers in
- Summer
- Evergreen
- Evergreen
- Garden style
- Gravel garden
- Sun or shade
- Likes full sun
- Soil type
- Gravelly soil, Loam (normal)
- Soil pH
- Acid (ericaceous), Neutral
- Drainage
- Well drained soil
- Hardiness
- Frost free greenhouse 1C & above (RHS H2)
- Borders & containers
- Borders
- Use for
- Sensory garden (tactile)
- Hazards
- No
Spring
Spring - late · Outdoors
Feed with sequestrol
If plants are acid loving and grown in soil with little acidity, or in a container, or are watered with limey tap water an annual feed with sequestrol (iron chelate) is highly beneficial. Follow guidelines on the packet. Will also 'blue-up' hydrangeas.
For hydrangeas that have good blue flowers in acid soil, this product can be used with alkaline soil to turn the flowers blue. This is most effective when the soil is neutral or just slightkly alkaline.
Spring-Autumn · Outdoors
Water during dry periods
For plants in the ground, when there has been little or no rain for a period of 7-10 days and the soil is dry, give it a deep watering and repeat weekly until there is a downpour of rain. Check plants in pots more frequently, especially in hot weather.
Summer
Summer - early · Outdoors
Feed a general fertiliser
Where plants have moderate needs for nutrients, they can simply be given a general feed, fairly early in the growth season so that the growth has plenty of time to harden off before the cold weather.
Give plants a general boost with the application of a general purpose fertiliser which is spread around the root area of the plant, with amounts as directed on the feed label.
Summer-Autumn · Outdoors
Mist the plant in warm weather
Revive plants in warm or hot weather by misting the foliage, preferably using soft or rain water which doesn't mark the foliage. Don't mist when the plant is in full sun. The plant can be misted twice daily if you notice the process revives it.
If leaves are covered in water drops when sun is on them, the droplets can act as little magnifying glasses and cause foliage scorch.
Winter
Winter · Planting
Apply a protective mulch
Protect with a mulch so that the plant does not become too wet in winter.
A mulch is a covering that can: protect the soil surface from rain, heat and cold; deter weeds; provide nutrients. Organic indicates that material has vegetative origin e.g. manure, compost. Synthetics i.e. plastics, or stones are often called mulches.
Planting & general
Outdoors
Water with rain water
This plant needs rain water or soft water (the minerals in alkaline or "hard" water are harmful). This is especially important for plants in pots.
Compost · Planting
Ericaceous compost
This plant requires acidic (ericaceous) soil. Where the soil is not acidic, or when planting in pots, use an ericaceous compost.