Category Archives: Conservatory/Greenhouse

Fritillaria biflora ‘Martha Roderick’


Fritillaria are bulbous herbaceous perennials with lance-shaped or linear leaves and nodding bell-shaped or bowl-shaped flowers that may be solitary or in racemes or umbels

‘Martha Roderick’ is a bulbous perennial to 30cm tall, with glossy lance-shaped leaves and deep reddish-purple, bell-shaped flowers, each tepal white in the outer half, opening in early spring

Common Name: black fritillary ‘Martha Roderick’
Family: Liliaceae
Color flower: Purple and White in Spring
Hardiness: old H3-4 (intermediate between H3 and H4)
Color foliage: Green in Spring
Height: 0.1-0.5 metres
Habit: Bushy
Habit: Slugs and lily beetles may be a nuisance
Pruning: No pruning necessary
Spreadid: South-facing
Time to ultimate height: 2-5 years
Exposure: Grow in a well-drained soil and full sun, with shelter from rain. Ideal to grow in a cold greenhouse or bulb frame in order to keep bulbs almost dry when dormant. Under glass, grow in loam-based potting compost with added grit and leaf mould
Garden characteristics: City/Courtyard Gardens, Cottage/Informal Garden, Flower borders and beds or Patio/Container Plants

Dieffenbachia ‘Tropic Snow’


Dieffenbachia are evergreen perennials with large, ovate leaves which are usually attractively mottled with white or yellow; flowering spathes are seldom produced in cultivation

‘Tropic Snow’ is a compact, almost stemless plant with ovate creamy-green leaves with darker green margins and midrib

Common Name: dumb cane ‘Tropic Snow’
Family: Araceae
Hardiness: H1a (heated greenhouse – tropical)
Color foliage: Cream and Green in Autumn, Spring, Summer and Winter
Height: 1-1.5 metres
Habit: Bushy
Habit: New growth is susceptible to damage by aphids
Pruning: No pruning required
Spreadid: North-facing
Time to ultimate height: 5-10 years
Exposure: Under glass grow in loam-based potting compost in bright filtered light with high humidity. Water moderately and apply a balanced liquid fertiliser monthly when in growth and keep just moist in winter
Garden characteristics: Low Maintenance or Patio/Container Plants

Dionysia ‘Charlson Thomas’


Dionysia are small evergreen perennials forming cushions of oblong or spoon-shaped leaves, with 5-petalled, salver-shaped, yellow, pink or purple flowers in spring or early summer

‘Charlson Thomas’ is a small, hummock-forming plant with tiny leaves and abundant, pale lilac flowers, each with a light yellow eye, opening in early spring

Common Name: dionysia ‘Charlson Thomas’
Family: Primulaceae
Color flower: Pale Blue in Spring
Hardiness: old H4 (hardy)
Color foliage: Green in Autumn, Spring, Summer and Winter
Height: Up to 10 cm
Habit: Mat forming
Habit: Generally pest free
Pruning: No pruning required
Spreadid: South-facing
Time to ultimate height: 5-10 years
Exposure: Grow under glass or in an alpine house in a mix of 3 parts grit to one part each of loam and leaf mould. Provide a deep collar of grit and maintain good ventilation in full light. When in growth water sparingly from below (ensuring the collar is kept dry) and water sparingly in winter. Also easy to grow outdoors in tufa in full sun but protect plant surface from wet
Garden characteristics: Patio/Container Plants or Rock Garden

Lachenalia contaminata AGM


Lachenalia are bulbous perennials with strap-shaped, sometimes dark-spotted leaves, and erect stems bearing racemes or spikes of tubular flowers, slightly fragrant in some species, in autumn, winter or early spring

L. contaminata is an erect bulbous perennial to 25cm tall, with narrow, grass-like leaves and erect stems bearing narrowly bell-shaped white flowers tipped with maroon, in spring

Common Name: wild hyacinth
Family: Asparagaceae
Color flower: White and Dark Purple in Spring
Hardiness: H2 (tender – cool or frost-free greenhouse)
Color foliage: Green in Autumn, Spring and Winter
Height: 0.1-0.5 metres
Habit: Bushy
Habit: Generally pest free
Pruning: No pruning necessary
Spreadid: South-facing
Time to ultimate height: 2-5 years
Exposure: Under glass grow in a loam-based potting compost in full light. Water moderately until in full growth then water freely, adding a balanced liquid fertiliser every 10-14 days. Reduce watering as the leaves fade, then keep dry until fresh growth starts in autumn
Garden characteristics: Patio/Container Plants

Gymnocalycium baldianum AGM


Gymnocalycium can be spherical or cylindrical cacti, with ribs divided into rounded, spiny tubercles, and funnel-shaped flowers in early summer

G. baldianum is a cactus with solitary, flattened-globose stems with 9-11 tubercled ribs and bristle-like radial spines. Funnel-shaped flowers 4cm across are deep pink to crimson in summer

Common Name: dwarf chin cactus
Family: Cactaceae
Color flower: Pink and Red in Summer
Hardiness: H2 (tender – cool or frost-free greenhouse)
Height: Up to 10 cm
Habit: Bushy
Habit: mealybugs may be a problem
Pruning: No pruning required
Spreadid: South-facing
Time to ultimate height: 5-10 years
Exposure: Grow under glass in a standard cactus compost, in bright, filtered light, with good ventilation. When in growth water moderately and feed every two or three weeks with a balanced liquid feed. Keep almost dry in the winter
Garden characteristics: Patio/Container Plants

Echinopsis backebergii subsp. backebergii


Echinopsis can have spherical or cylindrical, heavily ribbed and spiny stems, with funnel-shaped flowers in spring or summer

E. backebergii subsp. backebergii is a cactus with solitary or clustered, deeply ribbed, globose stems to 5cm across, bearing brown to grey spines; flowers up to 9cm across, carmine-red to violet with a paler centre

Common Name: Backeberg echinopsis
Family: Cactaceae
Color flower: Purple and Red in Spring and Summer
Hardiness: old H1 (requires heated greenhouse/indoors)
Height: Up to 10 cm
Habit: Bushy
Habit: Susceptible to mealybugs
Pruning: No pruning required
Spreadid: South-facing
Time to ultimate height: 2-5 years
Exposure: Grow under glass in a loam-based potting compost with added extra grit. Water moderately when in growth, sparingly when dormant. Apply a balanced liquid fertiliser 2 or 3 times in the growing season
Garden characteristics: Patio/Container Plants

Cuphea hyssopifolia AGM


Cuphea can be annuals, perennials or evergreen shrubs, often with sticky hairs, opposite, simple leaves and tubular flowers with a showy calyx and small petals

C. hyssopifolia is a compact, bushy spreading evergreen shrub to 45cm in height, with small, lance-shaped dark green leaves and small clusters of light purple, pink or white flowers 1cm across

Common Name: false heather
Family: Lythraceae
Color flower: Pink, Purple or White in Autumn or Summer
Hardiness: H1c (heated greenhouse – warm temperate)
Color foliage: Dark Green in Autumn, Spring, Summer and Winter
Height: 0.1-0.5 metres
Habit: Spreading / Branched
Habit: Generally pest free
Pruning: Pruning group 10 in spring if needed
Spreadid: West-facing
Time to ultimate height: 5-10 years
Exposure: Best grown in well-drained soil in a sheltered site in sun or partial shade but shade from hot sun. Alternatively grow in a pot under glass or as a houseplant
Garden characteristics: City/Courtyard Gardens, Flower borders and beds, Wall-side Borders or Patio/Container Plants

Pelargonium ‘Spanish Angel’ (A) AGM


Pelargonium can be perennials, sub-shrubs or shrubs, sometimes succulent and mostly evergreen, with palmately lobed or pinnately divided leaves and clusters of slightly irregular, 5-petalled flowers

Angel pelargoniums are compact, bushy perennials with small, rounded leaves, sometimes scented, and clusters of small single flowers in shades of pink, red purple or white

‘Spanish Angel’ grows to 30cm with flowers to 3.5cm across, upper petals deep blackish-red with bright magenta margins, lower petals pale lilac with deep red centre and dark veining near margins

Common Name: pelargonium ‘Spanish Angel’
Family: Geraniaceae
Color flower: Black, Purple, Pale Purple and Dark Red in Summer
Hardiness: H1c (heated greenhouse – warm temperate)
Color foliage: Green in Autumn, Spring, Summer and Winter
Height: 0.1-0.5 metres
Habit: Bushy
Habit: Vine weevil, leafhoppers, caterpillars, thrips, fungus gnats and aphids can be troublesome. aphids are generally more problematic on over-wintered plants
Pruning: Deadhead regularly
Spreadid: North-facing
Time to ultimate height: 1-2 years
Exposure: Grow in fertile well-drained soil in full sun. Remove spent flowers. To overwinter, grow small plants in late summer from cuttings
Garden characteristics: City/Courtyard Gardens, Coastal, Cottage/Informal Garden, Flower borders and beds or Patio/Container Plants