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Products > Grevillea 'Kings Rainbow' PP27,931
Grevillea 'Kings Rainbow' PP27,931

Habit and Cultural Information
Category: Shrub
Family: Proteaceae (Proteas)
Origin: Australia (Australasia)
Evergreen: Yes
Flower Color: Red & Yellow
Bloomtime: Year-round
Parentage: (G. armigera hybrid)
Height: 4-6 feet
Width: 6-8 feet
Exposure: Full Sun
Summer Dry: Yes
Irrigation (H2O Info): Low Water Needs
Winter Hardiness: 20-25 F
Grevillea 'Kings Rainbow' PP27,931 - A medium size spreading shrub to 5 to 6 feet tall with stiff dark green dissected leaves. Nearly year-round appear the 2 to 3 inch long yellow and red toothbrush type (secund) flowers with the red portions of the flower the exerted and mostly recurving styles capped with a small orange pistil that rise up from the yellow colored anther bearing tepals - very distinctive! Plant in full sun in a well-drained soil and give infrequent to occasional irrigation. This plant should prove hardy to 20-25 F. We began trialing this cultivar and Grevillea 'Kings Fire' in 2015 for Ball Horticulture and note that both are strong performers with very attractive foliage and flowers. Of the two Grevillea 'Kings Fire' is much more vigorous and has softer foliage and seems to bloom a bit more. These cultivars both are the result of a breeding program conducted by Digby Growns at the Plant Development at Kings Park and Botanic Garden in Perth, Western Australia and made their debut in North America in 2016 through Ball Horticulture/Star Roses & Plants. In the Star Roses & Plants 2016 catalog the description of this plant is that it grows to "5 to 6 feet tall with a spreading habit and dark green leaves. It has exotic looking blooms that flower year-round in Southern California. Its tough, durable, drought tolerant and has lots of textured color. Plant in full sun. Hardiness Zones 8,9,10,11 (we suspect this USDA rating of zone 8 perhaps too low). 'Kings Rainbow' does great in containers or in the landscape and is a favorite of hummingbirds." Given our experience with other similar Grevillea we speculate that this plant will perform best in a well-drained soil with occasional to infrequent irrigation and likely will be best to avoid applications of fertilizer containing phosphorus. 'King's Rainbow' is the result of crossing a selection of Grevillea armigera with an unnamed Grevillea hybrid (G. 20101122). This cross was conduction in September 2011 and the Grevillea armigera seed parent was a moderately vigorous semi-upright plant with yellow-green and dark burgundy to black colored inflorescences and the pollen parent, G. 20101122, a vigorous upright growing plant with medium red-colored inflorescences. 'Kings Rainbow was the only selected plant from this cross. It received US Plant Patent PP27,931 on April 25, 2017.  This description is based on our research and observations made of this plant as it grows in our nursery, in the nursery garden and in other gardens that we have visited. We will also incorporate comments received from others and always appreciate getting feedback of any kind from those who have some additional information about this plant, in particular if this information is contrary to what we have written or if they have additional cultural tips that would aid others in growing Grevillea 'Kings Rainbow' PP27,931.