Small-bracted Grevillea Plant Care
Grevillea microstegia Molyneux
Updated · Sources · How we source care data
Grevillea microstegia, commonly known as Mount Cassell grevillea, is a species of flowering plant in the family Proteaceae and is endemic to Victoria in Australia. It is a prostrate to low-lying or straggling shrub with deeply divided leaves, the end lobes triangular, and toothbrush-shaped clusters of reddish-brown flowers with a red style.
Every 7–14 days
Full sun to partial shade
50–80°F
40–70%
At a glance
How do you care for Small-bracted Grevillea?
Plant Small-bracted Grevillea in full sun to partial shade (USDA zones 12a) and water a young tree every 7–14 days until it is established. It tolerates temperatures of 50–80°F (10–27°C). Fertilize it every 8 months during the growing season.
Where Is the Small-bracted Grevillea Native To?
What Is the Small-bracted Grevillea?
Small-bracted Grevillea (Grevillea microstegia) belongs to the Proteaceae family within the Grevillea genus. Small-bracted Grevillea is native to Victoria in Australia.
Small-bracted Grevillea displays an upright, bushy shrub growth habit, reaching up to 6 ft tall with a spread of approximately 4 ft. Small-bracted Grevillea produces showy clusters of red, pink, or white flowers.
Leaf size: approximately 4 inches.
How Often Should You Water a Small-bracted Grevillea?
Water a young or newly planted Small-bracted Grevillea every 7–14 days, soaking the whole root zone, until it is established — usually one to two growing seasons. Established trees mainly need water during long dry spells. In a container, water whenever the top few centimetres of soil are dry.
Watering Frequency
Every 7–14 days
Until established; then in dry spells
What Light Does the Small-bracted Grevillea Need?
Small-bracted Grevillea thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Temperature and Humidity Does the Small-bracted Grevillea Prefer?
Grevillea microstegia tolerates temperatures of 50–80°F. Small-bracted Grevillea prefers humidity levels of 40–70%.
Temperature
50–80°F
Humidity
40–70%
What Soil Mix Works Best for a Small-bracted Grevillea?
Well-draining sandy loam with added organic matter. Good drainage is essential for Small-bracted Grevillea to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Small-bracted Grevillea?
Feed Small-bracted Grevillea every 8 months during the growing season with a balanced, slow-release fertilizer at the rate on the label. Established trees in good soil often need little extra feeding, so let weak growth or pale foliage guide you.
Stop feeding by late summer so new growth can harden before winter.
Fertilizing
Every 8 months
During the growing season
The PlantoScan app can remind you when to water and when to fertilize each plant.
Where Should You Plant a Small-bracted Grevillea?
Choose a spot with full sun to partial shade and well-draining sandy loam with added organic matter. Avoid low spots where water collects after rain.
Small-bracted Grevillea is suited to USDA Zone 12a.
Plant container-grown or balled-and-burlapped trees in spring or early autumn, setting the root flare at soil level, and water well after planting.
How Far Apart Should You Plant a Small-bracted Grevillea?
Small-bracted Grevillea can spread to about 4 ft (1.2 m) and reach about 6 ft (2 m) tall. Space plants about 4 ft (1.2 m) apart so mature crowns don't crowd each other, and plant at least half that distance from buildings, fences and paths.
Planning a row or hedge? Try the tree spacing calculator.
How Do You Prune a Small-bracted Grevillea?
Prune Small-bracted Grevillea while it is dormant in late winter: first remove dead, damaged and crossing branches, then thin lightly for shape.
If it flowers in spring, prune right after flowering instead so you don't remove next year's buds. Never take off more than about a quarter of the tree in one year.
How Do You Care for a Small-bracted Grevillea in Winter?
Small-bracted Grevillea is frost-tender (hardy to USDA zone 12). In colder areas grow it in a container and move it to a bright, frost-free place before the first frost.
How Do You Propagate a Small-bracted Grevillea?
Small-bracted Grevillea can be propagated through seeds, cuttings. Similar propagation techniques also apply to acacia grevillea plant care, which shares the same genus.
Is the Small-bracted Grevillea Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Small-bracted Grevillea, so we can't confirm whether it is safe for cats and dogs. Keep pets from chewing it as a precaution.
This is a general caution, not veterinary or medical advice. If your pet ate a plant, contact your vet or animal poison control.
See all plants toxic to cats and plants toxic to dogs.
What Pests and Diseases Affect the Small-bracted Grevillea?
Small-bracted Grevillea is susceptible to aphids, scale insects, caterpillars. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.
Yellow leaves, brown tips or drooping? See common plant problems and how to fix them.
What USDA Hardiness Zone Does the Small-bracted Grevillea Need?
Small-bracted Grevillea grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. Small-bracted Grevillea is native to Victoria in Australia. In cooler regions, grow Small-bracted Grevillea as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 12a
Keep exploring plants
Small-bracted Grevillea is one of many species covered in the complete plant care and identification guide, which groups plants by genus, attribute, and popularity.
It belongs to the Grevillea genus — compare its care with other Grevillea species on PlantoScan.
Grevillea is part of the Proteaceae plant family — browse all Proteaceae genera and species.
Small-bracted Grevillea thrives in bright light and direct sun — see other bright-light plants.
More Grevillea Species
Other Grevillea species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
Sources
- Scientific name & taxonomy: Grevillea microstegia Molyneux, family Proteaceae (first published in Muelleria 3: 141 (1975)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Small-bracted Grevillea, so we can't confirm whether it is safe for cats and dogs. Checked against the ASPCA plant list; any other toxicity note on this page comes from PlantoScan's plant database.
- Hardiness zone: USDA Zone 12a, calculated from the plant's minimum temperature.
- Care values(watering, light, temperature, humidity, soil, fertilizing): PlantoScan's plant database, filtered by automatic plausibility checks — values that fail them are hidden. How we source and check plant data.
Spotted a mistake? Email info@upvision.media with the page link — we check and correct reported errors.
