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Description

Noel's grevillea is a dense and prickly shrub with a mounding habit growing 3-4 ft. tall, 4-5 ft. wide, with bright green needle-like foliage. Flowers are pink and cream, and provide colorful accent value from winter into spring and intermittently throughout the year. This cultivar originated in California, and has since been one of the most popular choice of Grevilleas for slope, screen and border plantings in the Inland Empire. It has proven to be highly tolerant of sun, heat and periods of drought. It can be clipped to grow as a hedge plant as well as to manage its size.

Water Needs

Noel's grevillea is an easy to grow plant in sunny locations on well drained soils and with low amounts of supplemental water during summer. The chart shown below provides a recommended baseline guide to the monthly irrigation schedule and volume of supplemental water needed to maintain healthy growth throughout the average year. It should be noted there are several months indicated by an asterisk (*) when winter rains can provide sufficient moisture and irrigation is not needed. The high and low range of moisture indicates it can grow with varying amounts of water; more moisture during spring helps achieve a more robust and longer flowering cycle.

Irrigation Schedule and Graph

Low Water Use Plants

Irrigation Schedule 2

  Jan* Feb* Mar* Apr May Jun Jul Aug Sep Oct Nov* Dec*
Runs per Month 0x to 2x 0x to 2x 0x to 2x 1x to 2x 1x to 2x 1x to 2x 1x to 2x 1x to 2x 1x to 2x 1x to 2x 0x to 2x 0x to 2x
Inches per Run 1" 1" 1" 1" 1" 1" 1" 1" 1" 1" 1" 1"
 
Inches per Month 0" to 2" 0" to 2" 0" to 2" 1" to 2" 1" to 2" 1" to 2" 1" to 2" 1" to 2" 1" to 2" 1" to 2" 0" to 2" 0" to 2"

Range of supplemental summer water: 7"-14"
Range of supplemental winter water: 0"-10"

 
0"-2"
0"-2"
0"-2"
1"-2"
1"-2"
1"-2"
1"-2"
1"-2"
1"-2"
1"-2"
0"-2"
0"-2"
  Jan* Feb* Mar* Apr May Jun Jul Aug Sep Oct Nov* Dec*
For more information on how to use this Irrigation Schedule and Graph, follow this link.

For information how to calculate your irrigation system’s schedule and precipitation rate, please follow this link.

Plant Properties

Plant Type: Shrub
Foliage Character: Evergreen
Habit: Mounding, Dense, Arching
Growth Rate: Fast
Height: 3 ft. - 4 ft.
Width: 4 ft. - 5 ft.
Water Needs: Low 2
Foliage Color: Medium green
Flower Color: Pink, Cream
Flower Season: Winter, Spring
Soil Adaptations: Well-draining soil
Exposure Adaptations: Wind, Heat, Drought, All day sun
Function: Wildlife value, Slopes, Screening, Residential spaces, Raised planters, Parks and open space, Hummingbird plant, Grouped, Foundations, Flowering accent plant, Commercial spaces, Borders, Banks, Background plant, Hedge

Maintenance

Lightly shear to control size or increase density for use as a hedge (5). Pruning is best done after spring flowering (D).

References

Associations

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