Monthly Archives: May 2015

Rosa ‘Céleste’ aromat and beauty


Rosa can be deciduous or semi-evergreen shrubs or scrambling climbers, with usually thorny stems bearing pinnate leaves and solitary or clustered, 5-petalled flowers followed by showy red or purple fruits

Alba roses are very hardy large shrubs with sparsely prickly stems, greyish-green leaves and clusters of fragrant, double or semi-double flowers in midsummer.

‘Céleste’ is a strong-growing, bushy medium-sized shrub with neat, grey-green foliage and sweetly scented, semi-double, clear light pink flowers 8cm in width, showing a few yellow stamens in the centre

Common Name: rose ‘Céleste’
Family: Rosaceae
Color flower: Pale Pink in Summer
Hardiness: H7 (very hardy)
Color foliage: Green in SpringGreen and Grey/Silver in Autumn and Summer
Height: 1-1.5 metres
Habit: Bushy
Habit: Aphids, leafhoppers, glasshouse red spider mite, scale insects, caterpillars and rose leaf-rolling sawfly may be a problem. Rabbits and deer can cause damage
Pruning: Pruning group 23 (roses)
Spreadid: East-facing
Time to ultimate height: 2-5 years
Exposure: Grow in full sun with moderately fertile, humus-rich, moist but well-drained soil. For best flowering apply a balanced fertiliser and mulch in late winter or early spring. Suitable for hedging, tolerant of poor soil and a north aspect
Garden characteristics: City/Courtyard Gardens, Cottage/Informal Garden, Cut Flowers, Flower borders and beds or Hedging/Screens

Pelargonium ‘White Glory’ (R)


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

Regal pelargoniums are evergreen perennials or subshrubs, bushy in habit, with rounded, often lobed leaves and usually single flowers to 4cm across, borne in clusters in summer, in shades of pink, red, orange and purple or white

‘White Glory’ is a bushy plant to 45cm with large clusters of large white flowers, each up to 7.5cm across

Common Name: pelargonium ‘White Glory’
Family: Geraniaceae
Color flower: White 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. Glasshouse whitefly can be troublesome
Pruning: Deadhead regularly
Spreadid: North-facing
Time to ultimate height: 1-2 years
Exposure: Grow in fertile well-drained soil in partial shade. 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

Dianthus barbatus ‘Noverna Purple’ (Noverna Series)


Dianthus can be annuals, evergreen perennials or subshrubs with narrow, often greyish leaves and showy flowers that are frequently fragrant

‘Noverna Purple’ is an annual or biennial growing to 30cm, with mid-green foliage and erect stems bearing a flat cluster of strong pinkish-purple flowers in early summer

Common Name: sweet william ‘Noverna Purple’
Family: Caryophyllaceae
Color flower: Purple in Summer
Hardiness: old H4 (hardy)
Color foliage: Green in Autumn, Spring and Summer
Height: 0.1-0.5 metres
Habit: Bushy
Habit: Can get aphids, slugs and caterpillars
Pruning: Deadheading if required
Spreadid: North-facing
Time to ultimate height: 1-2 years
Exposure: Grow in a well-drained neutral to slightly acid soil in full sun
Garden characteristics: Banks and Slopes, City/Courtyard Gardens, Coastal, Cottage/Informal Garden, Flower borders and beds or Patio/Container Plants

Chrysanthemum Dana ‘Yodana’ (25b)


Chrysanthemum are erect woody-based perennials with aromatic, pinnately lobed leaves and flowerheads of diverse form, from late summer to late autumn

Medium-flowered, Early Flowering Outdoor Intermediate chrysanthemums bear fully double flowerheads in late summer and early autumn

Dana is an erect half-hardy perennial to 1.2m in height, with long-stemmed, double, light greenish-yellow flowers to 13cm in width

Common Name: chrysanthemum Dana
Family: Asteraceae
Color flower: Yellow in Autumn and Summer
Hardiness: H3 (half hardy – unheated greenhouse/mild winter)
Color foliage: Green in Autumn, Spring and Summer
Height: 1-1.5 metres
Habit: Bushy
Habit: Aphids and leaf miners are common pests. Leaf and bud eelworms can damage stock that has not been heat-treated. Earwigs sometimes damage blooms. Capsid bug and glasshouse red spider mite are occasional pests
Pruning: Cut back to near ground level in the autumn, before lifting and storing for the winter
Spreadid: North-facing
Time to ultimate height: 1-2 years
Exposure: Grow in a sheltered site in full sun in fertile well-drained soil, enriched with organic matter and general purpose fertiliser. Water freely in dry weather. Pinching out the growing tip when the plants are 15-20cm tall to encourage free flowering bushy plants. Staking is usually required. There is no need to deadhead. In mild areas leave in the ground protected by a thick mulch. Elsewhere lift the crowns and store in a greenhouse, raising fresh plants from these each year
Garden characteristics: Cottage/Informal Garden, Flower borders and beds or Cut Flowers

Pelargonium tomentosum (Sc)


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

Scented-leaved pelargoniums are evergreen shrubs or perennials with strongly aromatic foliage and small, single flowers in shades of pink, purple and white

P. tomentosum is a spreading plant to 75cm, with velvety, peppermint-scented, heart-shaped leaves to 10cm in width, and small clusters of tiny white flowers

Common Name: peppermint geranium
Family: Geraniaceae
Color flower: White in Summer
Hardiness: H1c (heated greenhouse – warm temperate)
Color foliage: Green in Autumn, Spring, Summer and Winter
Height: 0.5-1 metres
Habit: Bushy
Habit: Susceptible to vine weevil, caterpillars and thrips
Pruning: Deadhead regularly
Spreadid: West-facing
Time to ultimate height: 2-5 years
Exposure: Under glass grow in a loam-less or loam-based potting compost in full light with shade from hot sun with good ventilation. When in growth water moderately and apply a balanced liquid fertiliser in spring and early summer. A high potash fertiliser should be used when in flower. Water sparingly in winter. Can be grown outside in frost-free areas in a fertile soil
Garden characteristics: City/Courtyard Gardens, Coastal, Cottage/Informal Garden, Flower borders and beds or Patio/Container Plants

Iris ‘Joyce’ (Reticulata) – little wonder in your garden


Iris may be rhizomatous or bulbous perennials, with narrowly leaves and erect stems bearing flowers with 3 large spreading or pendent fall petals, alternating with 3 erect, often smaller, standard petals, in late winter, spring or early summer

Reticulata irises are small, bulbous perennials with narrow leaves almost square in section, and solitary, sometimes fragrant purple, yellow or blue flowers in early spring

‘Joyce’ is a perennial to 12cm tall, with solitary deep blue flowers in early spring, the falls darker, with yellow midrib and white spotting in the throat

Common Name: iris ‘Joyce’
Family: Iridaceae
Color flower: Blue in Spring
Hardiness: old H4 (hardy)
Color foliage: Green in Spring
Height: Up to 10 cm
Habit: Bushy
Habit: Susceptible to slug and damage by snails
Pruning: No pruning required
Spreadid: South-facing
Time to ultimate height: 2-5 years
Exposure: Grow in well-drained neutral or slightly alkaline soil
Garden characteristics: City/Courtyard Gardens, Coastal, Cottage/Informal Garden, Flower borders and beds, Gravel Garden, Rock Garden or Patio/Container Plants

Lobularia maritima Golf Series


Lobularia can be annuals or perennials, of low spreading habit, with simple leaves and short terminal racemes of 4-petalled, fragrant flowers in summer

Golf Series are compact annuals with small, grey-green leaves and short, dense racemes of flowers in shades of purple, pink and white

Common Name: sweet alyssum Golf Series
Family: Brassicaceae
Color flower: Pink, Purple or White in Summer
Hardiness: old H3 (may need winter protection)
Color foliage: Green and Grey/Silver in Autumn, Spring and Summer
Height: Up to 10 cm
Habit: Bushy
Habit: Slugs and flea beetles may be a problem
Pruning: Cut back after flowering
Spreadid: North-facing
Time to ultimate height: 1 year
Exposure: Grow in light, moderately fertile, well-drained soil in full sun. Clip over after flowering to encourage further blooms. The image shown represents a pastel mix of the Golf Series
Garden characteristics: City/Courtyard Gardens, Coastal, Cottage/Informal Garden, Flower borders and beds, Garden Edging or Patio/Container Plants

Cyclamen repandum


Cyclamen are tuberous perennials with rounded, sometimes angular, leaves which are often attractively mottled. The nodding, characteristically shaped flowers have 5 reflexed and twisted petals, often with dark markings at the base

C. repandum is a dwarf perennial with heart-shaped leaves speckled with grey, and fragrant rose-red flowers 2cm in length from mid-spring

Common Name: wavy cyclamen
Family: Primulaceae
Color flower: Red in Spring
Hardiness: old H3-4 (intermediate between H3 and H4)
Color foliage: Grey/Silver and Dark Green in
Height: Up to 10 cm
Habit: Tufted
Habit: Mice and squirrels may be a problem; vine weevil can attack pot-grown plants
Pruning: No pruning required
Spreadid: South-facing
Time to ultimate height: 2-5 years
Exposure: Plant 5cm deep in moderately fertile, humus-rich, well-drained soil. Avoid excessive summer moisture and mulch well when leaves wither
Garden characteristics: Patio/Container Plants, Rock Garden or Underplanting of Roses and Shrubs