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Description

Moonlight grevillea is a robust evergreen shrub that grows with an upright habit 10-12 ft. tall and 6-8 ft. wide. Finely cut leaves are medium green, pinnately divided into long linear segments with sharp points that produce a feathery foliage appearance. Large cylindrical inflorescences of ivory-color flowers grow 6 in. long and provide striking accent character during winter and intermittently throughout the year.

This large grevillea offers unique foliage character and flower color in comparison to other Grevilleas. It is a fast growing plant that is well suited to background areas for screening, on slopes and for seasonal flowering value. It grows well in full sun to areas with afternoon shade, and low amounts of supplemental water. It's flowers produce nectar that attracts birds to the garden; it is a relatively low maintenance and easy care plant.

Water Needs

Moonlight grevillea grows best in sunny garden 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; good winter rains helps achieve a more robust and longer flowering cycle.

Irrigation Schedule and Graph

Moderate Water Use Plants

Irrigation Schedule 3

  Jan* Feb* Mar* Apr May Jun Jul Aug Sep Oct Nov* Dec*
Runs per Month 0x to 3x 0x to 3x 0x to 3x 2x to 3x 1x to 2x 1x to 2x 1x to 2x 1x to 2x 1x to 2x 2x to 3x 0x to 3x 0x to 3x
Inches per Run 1" 1" 1" 1" 1" 1" 1" 1" 1" 1" 1" 1"
 
Inches per Month 0" to 3" 0" to 3" 0" to 3" 2" to 3" 1" to 2" 1" to 2" 1" to 2" 1" to 2" 1" to 2" 2" to 3" 0" to 3" 0" to 3"

Range of supplemental summer water: 9"-16"
Range of supplemental winter water: 0"-15"

 
0"-3"
0"-3"
0"-3"
2"-3"
1"-2"
1"-2"
1"-2"
1"-2"
1"-2"
2"-3"
0"-3"
0"-3"
  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: Upright, Robust, Mounding, Low-branching, Dense
Growth Rate: Fast
Height: 5 ft. - 6 ft.
Width: 6 ft. - 7 ft.
Water Needs: Moderate 3
Foliage Color: Medium green
Flower Color: Cream
Flower Season: Winter
Soil Adaptations: Well-draining soil
Exposure Adaptations: Heat, Drought, All day sun, Partial sun
Function: Wildlife value, Slopes, Screening, Residential spaces, Parks and open space, Hummingbird plant, Grouped, Flowering accent plant, Commercial spaces, Banks, Background plant

Maintenance

May benefit from light pruning when young to establish an evenly balanced and dense branch pattern (D). This is a quite large bush that can be kept smaller by lightly pruning on a regular basis and periodic hard pruning, which is able to tolerate (10). Hard pruning is best in early spring (D).

References

Associations

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