Plumbago auriculata
Leadwort, Cape leadwort, Blue plumbago
Also known as Plumbago capensis
- Height × spread
- 4m × 4m
- Position
- Tolerates full sun, likes part shade
- 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 frost tender, fragile looking shrub that grows happily in a container, and can be moved out of the greenhouse or conservatory for the summer months. The shrub has clusters of the softest blue flowers. The soft green leaves are oval and otherwise unremarkable. It will naturally flower for months during summer and into autumn. Out of flower, it is not a distinguished shrub and can be lax and floppy. So, it is best kept pruned to a compact height or tied to supports and trained as a climber. In the tropics it is sometimes used as a hedging plant, and it is mildly poisonous if eaten. Feed it regularly in summer, keep it nearly dry in winter, and trim flowered shoots back in late winter. It is should reach around 3m (10ft) in height with a 1m (3ft) spread, but could double these proportions if left to its own devices.
- Flower colour
- Blue
- Foliage colour
- Green
- Variegated
- No
- Scent
- No
- Shape
- Fan
- Height
- 4m
- Spread
- 4m
- Height in 10 years
- 2m
- Spread in 10 years
- 2m
- Season of interest
- Summer, Autumn
- Flowers in
- Summer, Autumn
- Evergreen
- Deciduous
- Garden style
- Shady court, Seaside garden, Mediterranean garden, Indoors, Conservatory
- Sun or shade
- Tolerates full sun, likes part shade
- Soil type
- Chalk, Gravelly soil, Loam (normal), Sandy soil
- Soil pH
- All types
- Drainage
- Well drained soil, Dry soil, Drought resistant
- Hardiness
- Frost free greenhouse 1C & above (RHS H2)
- Borders & containers
- Borders and containers
- Indoor light
- full light at all times
- Indoor temperature
- 7C minimum temperature
- Use for
- Wall cover, Structural
- Walls
- West, East facing
- Hazards
- Yes, potentially harmful; Humans: Skin irritant
Spring
Spring-Autumn · Indoors
Feed with houseplant food monthly
Give the plant a balanced houseplant feed monthly while in growth.
Where food elements are listed as three numeric values on the label representing in order Nitrogen(N)-Phosphorus(P)-Potassium(K), with percentage values for each, choose one where the values are more or less equal.
Spring-Autumn · Indoors
Water regularly during growth
Water regularly while in growth.
Adopt a regime that means the plants are thoroughly watered every week so that they do not become dessicated. In hot weather watering may need to be more frequent, but less often in cool or moist conditions.
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 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.
Spring - late · Planting
Train the climbing plant on supports
In the first two seasons of its life with you, train four stems onto plant supports, cutting back the remainder. Then pinch back stems that have reached the required height. Trim older growth to 30cm high and tie to the support.
Summer
Summer-Autumn · Planting
Support tall stems
The plant may require support for long stems. Provide an artificial frame which it can grow through, or loosely tie the whole plant. A network of twigs can be woven together to provide a framework through which the plant can grow.
Tall stems can lean or be battered by weather. Support the plant to keep its vertical lines, aiming for a natural appearance which is easy on the eye.
Winter
Winter-Spring · Indoors
Water lightly in winter
The soil should remain just moist during the cold months when the plant is not in growth. Trickle a little water onto the soil surface every couple of weeks if the soil is dry. Do nothing if it is moist.
The roots remain active in winter and benefit from small amounts of moisture so they don't become completely desiccated.
Winter · Outdoors
Water lightly during dormancy
The soil should be kept just moist during the plant's rest period.
Planting & general
Outdoor planting · Planting
Add root growth stimulant to the planting hole
Mycorrhizal fungi helps roots establish quickly, so they absorb water and nutrients more efficiently. It comes as a powder, granule or gel. Add to the planting hole or container, and to the plant's rootball before planting in the hole. For "bareroot" plants use a gel.
Compost · Planting
Loam based houseplant compost for repotting
Buy container or house plant compost that is loam based if possible (i.e. is based on John Innes compost number 2 or 3. This contains more fertiliser and is better suited to established plants.
John Innes no. 1 has the lowest level of fertiliser and is used for seedlings and young plants, so is generally used where plants will be 'potted on' after a number of weeks.
Indoor temperature · Planting
7C minimum temperature
This plant requires a minimum temperature of 7 Centigrade.
Indoor plant · Planting
Position in a sunny spot, close to window
Give this plant a position where there is as much light and sunlight as possible, within 2-3 metres of a sunny or bright window (one that is south, east, or west facing).