Plant Guide

a b c d e f g h i j k l m n o p q r s t u v w x y z #

Dry

convolvulus-sabatius-subsp-mauritanicus

Convolvulus sabatius subsp. mauritanicus

bindweed, ground morning glory, blue rock bindweed

Evergreen, trailing ground-covering plant belonging to the morning glory family (Convolvulaceae), native to North Africa, Spain, and Italy. Funnel-shaped blue to mauve flowers, 2.5 cm wide, appearing mainly during summer and early autumn. Flowers open and close in relation to the amount of sunlight they receive. Soft, fine-haired grey-green leaves, 1.5-3.5 cm long.

Synonym: Convolvulus mauritanicus.

Prefers a sunny position in any well-draining soil. Drought tolerant once established. Tolerates moderate frosts (zones 8-10).  Trim in late winter to prevent the plant from becoming too woody. Suitable for coastal areas.

Undemanding, easy care plant that flowers profusely in summer. Looks great, trailing over walls. Not invasive (unlike the common morning glory).

coprosma-acerosa

Coprosma acerosa

sand coprosma

Low mound-forming, New Zealand native ground-cover with intertwining, brown-orange branches and very small, needle-like, olive green leaves. Blue berries are formed when plants of both sexes are present. Occurs naturally in coastal areas throughout New Zealand.

Prefers a sunny position in well-draining soil.

Excellent ground-covering, low-maintenance plant with an unusual wiry texture that contrasts beautifully with large, shiny, and/or smooth foliage (e.g. flaxes, Astelia, Arthropodium). Great for coastal gardens and hot, dry areas.

coprosma-repens

Coprosma repens

taupata, mirror plant

Variable evergreen shrub or tree to 4-6 m tall, with oblong, thick, very shiny leaves. Leaf size varies from 6-9 cm long and 4-7 cm wide in shade to 2-3 cm long and 1.5-2 cm wide in full sun. Leaf margins may be wavy or somewhat curled under.  Like many coprosma species, the leaves have small pits (domatia) between the midvein and one or more lateral veins of the undersides. Inconspicuous female and male flowers on separate plants. On female plants, flowers are followed by bird-attracting orange-red drupes.

Occurs naturally throughout the North Island and parts of the South Island of New Zealand. Has give rise to a number of variegated cultivars.

Extremely tough plant, tolerant of very exposed coastal situations where it may become prostrate or assume gnarled and twisted shapes. Prefers full sun, but tolerates partial shade well. Copes with deep shade, but is more stretched and less compact. Intolerant of wet or waterlogged soil. Suitable for dry areas. Tolerates light frosts.

Responds well to clipping and is often used as a hedge, in particular in coastal areas.

coprosma-kirkii-variegata

Coprosma x kirkii 'Variegata'

Variegated cultivar of the natural hybrid Coprosma x kirkii, a New Zealand native, ground covering plant. The tiny leaves are green with a cream margin, resulting in a grey overall appearance. Tough, mat-forming, woody plant.

Prefers a sunny or lightly shaded position in any well-draining soil. Drought-tolerant once established. Suitable for coastal or exposed conditions. Good for erosion control on banks. Frost hardy to about -12 deg Celsius. Requires very little attention other than an occasional trim to keep the plant low and dense.

In my city Coprosma x kirkii 'Variegata' is a popular ground covering plant in public spaces, such as gardens of car parks, where it is successfully used to form a dense, tidy looking, light grey mat that helps to keep the weeds down, thus reducing maintenance requirements.

cordyline-australis

Cordyline australis

ti-kouka, cabbage tree

Tall, evergreen tree, endemic to New Zealand, with a rounded canopy consisting of large clusters of long, narrow leaves. Common throughout New Zealand in open ground, around swamps and damp places, and along forest margins. The leaves are linear with an entire margin, and up to 1 m long by 6 cm wide. They turn brown with age and remain hanging on the tree for a long time before falling, forming a skirt beneath the young green leaves. Large panicles of small, 0.5 cm wide, creamy white, strongly scented flowers are produced on mature trees in summer, attracting bees. Birds like the blue-white berries that are formed subsequently. Cordyline australis grows to about 15 m high, with an unbranched trunk when young (and undamaged), and forming side-branches in the upper part later.

The Maoris used the leaves of Cordyline australis for medicinal purposes, and the roots of young trees as a source of food. Early settlers hollowed out the trunks of large specimens to make chimneys, since the timber (unlike the foliage) is fire-resistant. They used to boil and eat young shoots as a substitute for cabbage, hence the common name. 

Prefers a position in full sun or partial shade. Likes moist soil, but can cope with considerable drought once established. Grows in just about any soil type, including clay soils as long as they are not too impermeable. Tolerates moderate frosts (to zone 8) and is hardy throughout New Zealand. Suitable for coastal and exposed sites. Caterpillars may cause some leaf damage. Stressed trees are susceptible to rust. In warm, humid areas root rot (Phytophtora) may become a problem, but can be avoided by growing other plants beneath the trees to keep their root-zones cool.

Great choice for a stunning architectural statement. Imagine a group of cabbage trees with a simple, contrasting under-planting of Muehlenbeckia astonii. You may want to plant Cordyline australis at some distance from your lawn....the lawnmower doesn't like the tough old leaves! Useful as a primary coloniser and good for erosion control on steep banks and along streambanks.

crataegus-paul-s-scarlet

Crataegus laevigata 'Paul's Scarlet

Paul's Scarlet hawthorn

Small, deciduous tree in the rose family (Rosaceae) with thorny branches. Very showy, crimson, double flowers in spring. Alternate, glossy leaves with three-five lobes and toothed margins. Yellow and bronze autumn foliage. Discovered more than 150 years ago as a sport on a Crataegus laevigata 'Rosea Flore Pleno' plant, and introduced to the trade in 1866 by the plantsman William Paul (England).

Synonym: Crataegus laevigata 'Coccinea Plena'. Also sold as Crataegus x media 'Paul's Scarlet'.

Suitable for a sunny or partially shaded position in any well-drained soil. Crataegus laevigata 'Paul's Scarlet can handle dry conditions reasonably well once established, and is suitable for coastal gardens and windy sites. Does not require much pruning other than the removal of dead, damaged, or crossing branches in autumn or winter. Susceptible to rust, leaf spot, and blight. Frost hardy (to USDA zone 4).

Crataegus laevigata 'Paul's Scarlet' looks absolutely magnificent when smothered with frilly, rosy pink blossoms in mid spring. I just wish it would flower for a longer time! 

crocosmia-crocosmiiflora

Crocosmia x crocosmiiflora

Montbretia

Perennial in the Iris family with light green, long and narrow leaves (90 x 2 cm) that spreads with underground rhizomes. Sprays of bright orange flowers held on long, thin, zig-zag stems, arising from the foliage clumps during late summer. Can become invasive in mild, wet climates as it tolerates many adverse conditions including grazing. The seeds are not a problem, since not many are produced, but the plants can multiply and spread rapidly via their corms and rhizomes. In New Zealand and some other parts of the world Crocosmia x crocosmiiflora is regarded as an environmental weed, competing with ground covering shrubs and native seedlings.

Crocosmia x crocosmiiflora is a hybrid bred in France in 1880 by crossing two African species Crocosmia aurea and Crocosmia pottsii.

Prefers a sunny, sheltered spot in well-draining soil, but will adapt to most soils and tolerates partial shade, heat, and moist soils. Quite drought tolerant, but benefits from an occasional watering during exceptionally dry weather. Frost hardy (zones 5-9). In cold climates, the corms can be lifted and stored in a cool, dry place until spring. 

Easy to grow and consistently produces lots of flowers. Divide the clump after a few years to maintain vigour. Suitable for containers and cut flowers. Beautiful bright colours.

dodonaea-viscosa

Dodonaea viscosa

akeake, hopbush, hopseed, hopwood, soapwood, sticky hopbush

Variable, evergreen shrub or small tree, occurring naturally in coastal and lowland forests throughout the North Island, the northern part of the South Island of New Zealand, and the Chatham Islands. Also found in southern Africa, tropical America, the Pacific Islands, and throughout Australia. Alternate, linear to lanceolate, pale to mid-green, sticky leaves, 4-10 cm long and 1-3 cm wide. Tiny creamy yellow, usually unisexual flowers in spring, with male and female flowers borne mostly on separate trees. In summer, female flowers are followed by conspicuous, 1-2 cm wide, winged seed capsules. These capsules are pale yellow, gradually turning reddish brown, starting from the edges of the wings. Attractive red-brown bark, peeling in stringy flakes. Very tough wood, black with white streaks.

Prefers a sunny or semi-shaded position in well-draining soil. Tends to become leggy when light levels are too low. Tolerates light to moderate frosts (zone 9), coastal conditions, dry soils, and strong winds. Does not tolerate wet soils. Prune regularly and lightly to keep compact. Responds to trimming for hedging purposes.

Versatile, fast-growing plant. Dodonaea viscosa can be grown as a specimen tree by gradually removing the lower branches, showing off the bark and developing an interesting, irregular crown, shaped by the wind in exposed situations. Although predominantly used as a foliage plant, a tree laden with seed capsules is a sight to behold. Excellent choice for a hedge, in particular in coastal areas, and when alternated with other hedging plants. Also makes a good filler or backdrop for lower-growing shrubs with different textures and/or foliage colours. 

dodonaea-viscosa-purpurea

Dodonaea viscosa 'Purpurea'

purple akeake

Purple-bronze cultivar of Dodonaea viscosa, originally discovered in the early 1890s on a riverbank in Marlborough in New Zealand. Grows into a small bushy tree or shrub up to 4 m tall and 2 m wide. Narrow-obovate to narrow-elliptic leaves, 4-10 cm long and 1-3 cm wide. The purple leaf colour intensifies during the colder months. Flowers are arranged in terminal panicles to 4 cm long, purplish red, and mostly bisexual. (The species itself produces dull yellow unisexual flowers, usually on separate plants.) Flowers are followed by much larger, winged, purplish red seed capsules in summer. Red-brown, stringy bark. 

Prefers a sunny or partially shaded position in free-draining soil. Suitable for dry, exposed, and coastal sites. Tolerates light to moderate frosts (zone 9). Intolerant of very wet soils. Soft growth responds well to trimming, but avoid pruning old wood. Lower branches can be removed to create a clear-trunk. Leaf colour is better when planted in poor soil.

Makes an interesting specimen tree with attractive bark, beautiful purple foliage, reddish purple seed capsules and, in particular in very windy areas, an irregularly shaped canopy. Excellent choice for hedging purposes in coastal gardens. Cut stems with foliage and seed capsules add an unusual dimension to floral arrangements.

echinops-ritro

Echinops ritro

small globe thistle, blue globe thistle, steel globe thistle, globe flower, blue hedgehog

Eurasian, herbaceous perennial in the Asteraceae family. Grey-green, deeply cut, evergreen foliage. Spherical, steel-blue flower heads, 5 cm across, on long, silvery stems in late summer and autumn. Attracts bees and butterflies. Birds like the seeds.

Prefers a sheltered position in full sun and poor, well-draining soil. Tolerates partial shade and dry conditions. Suitable for coastal gardens. Stems are quite strong, but staking may be required in windy locations. Cut back to near ground level after flowering. Leave the flowering stems on the plant if you wish to encourage self-seeding. Cutting spent flowering stems back early in the season helps the plant to produce a second flush of flowers. Divide the plant after 3-4 years.  Echinops ritro is generally trouble-free and easy to grow.

Attractive contrasting plant with globe-shaped flowers in stunning metallic blue, set off beautifully against the silvery stems and greyish foliage. Combines well with tall grasses that flower at about the same time, such as Miscanthus sinensis cultivars. Excellent for dried and fresh cut flower arrangements.

echium-candicans

Echium candicans

pride of Madeira

Soft-wooded evergreen shrub with a sprawling habit, native to the Canary Islands and Madeira. Hairy, grey-green leaves to 20 cm long, arranged in whorls along the stems. Smaller leaves on flowering stems. Large 20-40 cm long spikes of sapphire to violet blue flowers with crimson stamens during late winter and early spring. Usually perennial, but may behave as a biennial, forming rosettes of leaves in the first year, producing flowers in the second year, and dying after flowering. Attracts bees and butterflies.

Synonym: Echium fastuosum

Prefers a sunny position in well-drained soil. Remove dead flowers and prune after flowering to keep compact. Tolerant of light frosts. Grows well in dry, exposed, and coastal conditions. 

Striking feature plant when in flower. Excellent choice for flower display in dry, sandy, seaside gardens.

Elaeagnus pungens 'Maculata'

Elaeagnus pungens 'Maculata'

variegated silverberry

Evergreen variegated shrub, native to Japan. Main branches spiny and more or less horizontal and arching. Copper coloured twigs. Oval leaves shiny green and yellow above, dull grey beneath with small brown glandular dots. Insignificant, but very fragrant flowers in autumn. Fast growing and tough: prefers full sun, but tolerates a wide range of conditions.

epimedium-rubrum

Epimedium x rubrum

Bishop's hat, red barrenwort

Perennial ground cover with heart-shaped leaves and sprays of small, rosy-red flowers in spring. The green leaves have a reddish tinge when young, turn more red in autumn and may persist as brown-red foliage during winter. Grows relatively slowly, spreading with underground rhizomes.

Prefers a moist, but well drained position in partial or full shade. Keep moist when young. Once established, Epimedium x rubrum tolerates dry conditions. Old leaves are best removed in spring or earlier so that the young foliage and flowers are better visible. Apply mulch or compost after removal of the foliage. Can be propagated by division.

Excellent ground cover for shady, dry areas such as beneath trees. Make sure to water the plant regularly until it is well established. Mine took a while to start growing, and at some point I thought it had died, until the young leaves emerged again in spring.

erigeron-karvinskianus

Erigeron karvinskianus

Mexican daisy, Santa Barbara daisy, Latin American fleabane, seaside daisy

Fine-textured, mound-forming, evergreen perennial, native to Mexico, Venezuela, and Central America. Flowers profusely from spring to autumn, and all year round in mild climates. Thin, wiry stems with small narrow leaves, 1-4 cm long, three-lobed or without lobes. Yellow-centered, daisy-like flowers, 2 cm across, with white petals, turning pink with age. Naturalised in many parts of the world. Regarded as an unwanted, invasive weed in several countries, including New Zealand, Portugal, and New Caledonia.

Synonym: Erigeron mucronatus

Happiest in full sun or partial shade, and any well-drained soil. Copes with full shade, but lacks vigor and produces fewer flowers. Tolerates moderate frosts, coastal conditions, and drought once established. Self-seeds. If you wish to propagate this plant from an existing one, all you need to do is place a pot with potting mix next to the existing plant, and Erigeron karvinskianus will do the rest.

Versatile ground cover plant that grows almost anywhere, and flowers during most of the year. Particularly suited to cottage-style gardens, but also fits in beautifully with other themes, adding a delicate, somewhat playful touch to formal settings.

erythrina-sykesii

Erythrina x sykesii

coral tree, flame tree, Australian coral tree

Large deciduous or semi-deciduous tree of uncertain hybrid parentage (involving Australian native Erythrina species), with a short trunk and a relatively open canopy of ascending branches with rose-like thorns. Named after William Sykes, a New Zealand botanist. Compound leaves with three, heart-shaped, mid green leaflets, 7-20 cm long, 7-12 cm wide.  Bright scarlet flowers to about 6 cm long, in clusters at the tips of bare branches in late winter and early spring. Has become invasive in parts of Australia, where it is difficult to control since it grows easily from root segments. branches and clippings.

Prefers a position in full sun and moist soil. Can adapt to dry areas. Withstands coastal conditions, but needs wind protection. Branches are quite brittle and easily snap off during windy days. Tolerates light frosts to about -7 deg C. 

Magnificent specimen tree, in particular during winter and early spring when the canopy of bare branches is covered with masses of large, vibrant orange  flower clusters.