Comesperma sphaerocarpum Plant Care

Comesperma sphaerocarpum Steetz

Updated · Sources · How we source care data

Comesperma sphaerocarpum, commonly known as the broom milkwort, is an Australian plant in the milkwort family. Inconspicuous unless in flower, it grows from 10 to 30 cm high.

Water

Every 7–10 days

Light

Full sun to partial shade

Temp

50–80°F

Humidity

40–70%

At a glance

How do you care for Comesperma sphaerocarpum?

Plant Comesperma sphaerocarpum in full sun to partial shade (USDA zones 12a) and water a young shrub every 7–10 days until it is established. It tolerates temperatures of 50–80°F (10–27°C). Fertilize it every 6 months during the growing season.

What Is the Comesperma sphaerocarpum?

Comesperma sphaerocarpum (Comesperma sphaerocarpum) belongs to the Polygalaceae family within the Comesperma genus.

Comesperma sphaerocarpum displays a low, spreading ground cover growth habit, reaching up to 0.5 ft tall with a spread of approximately 2 ft. Comesperma sphaerocarpum produces small, delicate purple flowers in clusters.

Leaf size: approximately 1 inches.

How Often Should You Water a Comesperma sphaerocarpum?

Water a young or newly planted Comesperma sphaerocarpum every 7–10 days, soaking the whole root zone, until it is established — usually one to two growing seasons. Established shrubs mainly need water during long dry spells. In a container, water whenever the top few centimetres of soil are dry.

Watering Frequency

Every 7–10 days

Until established; then in dry spells

What Light Does the Comesperma sphaerocarpum Need?

Comesperma sphaerocarpum thrives in full sun to partial shade.

Light Requirement

Full sun to partial shade

What Temperature and Humidity Does the Comesperma sphaerocarpum Prefer?

Comesperma sphaerocarpum tolerates temperatures of 50–80°F. Comesperma sphaerocarpum prefers humidity levels of 40–70%.

Temperature

50–80°F

Humidity

40–70%

What Soil Mix Works Best for a Comesperma sphaerocarpum?

Well-draining sandy loam with added organic matter for moisture retention. Good drainage is essential for Comesperma sphaerocarpum to prevent waterlogging, which leads to root rot and fungal issues.

How Often Should You Fertilize a Comesperma sphaerocarpum?

Feed Comesperma sphaerocarpum every 6 months during the growing season with a balanced, slow-release fertilizer at the rate on the label. Established shrubs 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 6 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 Comesperma sphaerocarpum?

Choose a spot with full sun to partial shade and well-draining sandy loam with added organic matter for moisture retention. Avoid low spots where water collects after rain.

Comesperma sphaerocarpum is suited to USDA Zone 12a.

Plant container-grown or balled-and-burlapped shrubs in spring or early autumn, setting the root flare at soil level, and water well after planting.

How Far Apart Should You Plant a Comesperma sphaerocarpum?

Comesperma sphaerocarpum can spread to about 2 ft (0.6 m) and reach about 1 ft (0 m) tall. Space plants about 2 ft (0.6 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 plant spacing calculator.

How Do You Prune a Comesperma sphaerocarpum?

Prune Comesperma sphaerocarpum 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 shrub in one year.

How Do You Care for a Comesperma sphaerocarpum in Winter?

Comesperma sphaerocarpum 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 Comesperma sphaerocarpum?

Comesperma sphaerocarpum can be propagated through seeds, softwood cuttings. Similar propagation techniques also apply to blue-flower beggarticks plant care, which shares the same genus.

Is the Comesperma sphaerocarpum Toxic to Pets and Children?

Pet safety not verified

The ASPCA does not list Comesperma sphaerocarpum, 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 Comesperma sphaerocarpum?

Comesperma sphaerocarpum is susceptible to aphids, scale insects. 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 Comesperma sphaerocarpum Need?

Comesperma sphaerocarpum grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. In cooler regions, grow Comesperma sphaerocarpum as a houseplant or bring it indoors before the first frost.

Hardiness Zone

Zone 12a

Keep exploring plants

Comesperma sphaerocarpum 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 Comesperma genus — compare its care with other Comesperma species on PlantoScan.

Comesperma is part of the Polygalaceae plant family — browse all Polygalaceae genera and species.

Comesperma sphaerocarpum thrives in bright light and direct sun — see other bright-light plants.

More Comesperma Species

Other Comesperma species in PlantoScan's care catalogue share similar watering, light, and soil preferences:

Sources

  • Scientific name & taxonomy: Comesperma sphaerocarpum Steetz, family Polygalaceae (first published in Pl. Preiss. 2: 314 (1848)) — World Flora Online record, IPNI name record.
  • Pet toxicity: Pet safety not verified: the ASPCA does not list Comesperma sphaerocarpum, 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.

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