Geranium maderense
Maderian cranesbill, Geranio, Giant herb robert
- Height × spread
- 1.5m × 1m
- Position
- Full sun
- Hardiness
- Mild winter to -5C (RHS H3)
- Flowers
- Spring, Summer
Availability
Please ask in store about availability
Many plants are seasonal. Call 01234 567890 to check current stock.
About this plant
This is a fine, upstanding, tender geranium. It has large, handsome, deeply divided, jagged leaves which are aromatic. The little flowers, profusely borne, are held on long red brown stems, well above the foliage. These are coloured purple pink, red at the centre and with red anthers. It is generally a plant for the conservatory or greenhouse and can only be grown outside in the very mildest and most sheltered parts of the country where it classically makes good company with osteospermums. The plant is not long lived and can die, after flowering, though you may find fresh growth from surviving side shoots. The plant can grow up to 1.5m (4ft), though often much less.
- Flower colour
- Pink
- Foliage colour
- Green
- Variegated
- No
- Scent
- Yes
- Shape
- Bell
- Height
- 1.5m
- Spread
- 1m
- Season of interest
- Spring, Summer
- Flowers in
- Spring, Summer
- Evergreen
- Evergreen
- Garden style
- Scented garden, Indoors, Exotic garden, Conservatory
- Sun or shade
- Likes full sun
- Soil type
- Chalk, Gravelly soil, Loam (normal), Poor soil, Sandy soil
- Soil pH
- All types
- Drainage
- Well drained soil, Dry soil, Drought resistant
- Hardiness
- Mild winter to -5C (RHS H3)
- Borders & containers
- Borders and containers
- Indoor light
- A light position not direct sun
- Indoor temperature
- 3C minimum temperature
- Use for
- Bee attraction
- Maintenance
- Easycare – low/no maintenance
- Hazards
- No
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 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.
Spring - early-mid · Planting
Divide when too large
The plant can be divided if it becomes too large or another plant is required. This may involve physically dividing the clump in two, removing offsets or small bulbs or dividing rhizomes. The new plants can be grown in pots or planted in the ground.
Spring-Autumn · Planting
Remove dead leaves
When leaves die they can carefully be detached or cut off at their base to improve the overall appearance of the plant. Be careful not to damage the main stems during this process.
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.
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.
Compost · Planting
Loam based compost + sand for repotting
Use a standard loam based compost that is not modified to make it 'moisture retentive'.
Alternatively prepare your own mixture using a loam based compost (John Innes no. 2 or 3) with a handful or two of horticultural sand to make the soil more free-draining.
Indoor temperature · Planting
3C minimum temperature
This plant requires a minimum temperature of 3 Centigrade.
Indoor plant · Planting
Position in indirect light indoors
Give the plant a position that is cool and light, and away from direct sunshine.