Grevillea Moonlight is a water wise small bush or tree which likes acidic soil and full sun it thrives in Zone 9B. It is recommended to use free-draining soil and it does not like to be waterlogged. I prune my trees at least 30 percent yearly. I would not use phosphorus on this Australian plant. If you decide to use fertilizer look up the NPK ratio to use. This plant provides continuous blooms all year providing nectar for hummingbirds. (Pick up only) It may grow up to 8 to 12 feet tall and 5 to 7 feed wide. The current height on this plant is 3 to 4 feet tall and is always blooming.