One of the highlights of Garden Week is the new-release plants on display each year.
Here are some of the latest offerings.
COMING UP ROSES
Rose lovers are in for a treat, with Landsdale Rose Gardens unveiling a new variety - Encore, a healthy pink floribunda.
Peter Nosow, from Landsdale Rose Gardens, said Encore was named for its repeat flowering and ability to perform, with part proceeds from its sales going to breast cancer recovery program YWCA Encore.
Conostylis Silversunrise is a drought-tolerant plant with striking soft, silver foliage and a spectacular display of yellow flowers, said Lisa Passmore, horticulturalist, Inspired by Nature landscape designer and ambassador for local online nursery Plants4Perth.
"This new plant is a form of grey cottonheads but with three-times-the-size flowers," said Ms Passmore, who will present a talk on designer new-release plants at Garden Week.
BLAZE OF GLORY
A great performer in hot, dry areas, Gaillardia Fanfare Blaze has striking orange-and-red trumpet-like flowers and grey-green foliage and performs well in both containers and garden beds, according to Plants4Perth general manager Harlen Henderson.
"Its exceptionally long flowering period makes it a great addition to any sunny garden," he said.
OFF WITH THE BUTTERFLIES
Whistlepipe Gardens' Margy Clema said the Buddleja macrostachya Fansipan, commonly known as the fragrant butterfly bush, was a handsome butterfly-attracting 2x2m shrub with large, deep-green leaves and upright spikes of deep pink, strongly scented flowers in late winter and spring.
Mr Henderson said the fast-growing new Salvia Ember's Wish featured dense mid-green, lush foliage and big, bright coral tubular flowers throughout the warmer months. Part proceeds from its sale would go to Make-a-Wish Australia.
BLUE GREEN BABY
With powder blue leaves that darken to green as they mature, Lomandra glauca Blue Ridge is a reliable performer that can tolerate dry conditions as well as the heat and cold, Mr Henderson said. "This is the best selection of new blue grass I have seen," he said.
Dr Clema said the rare sun bromeliad Fascicularia Bicolor was well suited to a pot or as a hardy groundcover in light shade. "When in flower, mature specimens form a mound of densely clustered rather unremarkable leaves until autumn, when older rosettes turn bright red at the base and surround a tight disc of blue flowers," she said.
Tough and waterwise, Ceratopetalum Johanna's Christmas - a miniature New South Wales Christmas bush - grows to just over 1m and is a good performer in pots or garden beds, according to Mr Henderson.
"Tiny white flowers appear from spring and then the sepals turn a bold red to reveal a stunning display," he said.
Commonly known as Silverleaf Spurflower, Dr Clema said the hardy groundcover Plectranthus oertendahlii Emerald Lace originated in southern Africa and had naturally variegated silvery leaves and sprays of pale lavender flowers in autumn.
Mr Henderson said Beschorneria Reality, a tough new variegated form of a Mexican lily, boasts soft and pliable cream-and-green foliage, producing a striking pink-red flower spike when mature.
He said the broad variegated leaves could grow to a length of 1m with a width of up to 10cm.
Also known as King's Mantle or Bush Clock Vine, Thunbergia Erecta is a stunning shrub from tropical Africa that grows to 1.5m.
Hardy once established, Dr Clema said it had glossy deep-green leaves and pendulous violet-blue flowers up to 6cm wide, and was suitable for morning sun or light shade.