Large White Petunia Plant Care
Petunia axillaris (Lam.) Britton, Sterns & Poggenb.
Updated · Sources · How we source care data
Petunia axillaris, the large white petunia, wild white petunia or white moon petunia, is an annual herbaceous plant in the family Solanaceae, genus Petunia. It is native to temperate South America comprising southern Brazil, parts of Argentina and Uruguay.
Full sun to part shade
At a glance
How do you care for Large White Petunia?
Plant Large White Petunia in full sun to part shade.
Where Is the Large White Petunia Native To?
What Is the Large White Petunia?
Large White Petunia (Petunia axillaris) belongs to the Solanaceae family within the Petunia genus. Large White Petunia is native to temperate South America comprising southern Brazil, parts of Argentina and Uruguay. Large White Petunia is also known as Wild White Petunia.
Large White Petunia displays a compact, mounding habit growth habit, reaching up to tall with a spread of approximately . Large White Petunia produces abundant trumpet-shaped flowers in various colors.
What Light Does the Large White Petunia Need?
Large White Petunia thrives in full sun to part shade.
Light Requirement
Full sun to part shade
What Soil Mix Works Best for a Large White Petunia?
Well-draining, fertile soil with added compost or organic matter. Good drainage is essential for Large White Petunia to prevent waterlogging, which leads to root rot and fungal issues.
Where Should You Plant a Large White Petunia?
Choose a spot with full sun to part shade and well-draining, fertile soil with added compost or organic matter. Avoid low spots where water collects after rain.
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 Do You Prune a Large White Petunia?
Prune Large White Petunia 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 Large White Petunia in Winter?
Water deeply in late autumn before the ground freezes, and spread a 5–8 cm (2–3 in) layer of mulch over the root zone, keeping it away from the trunk.
Young and container-grown shrubs need extra protection: roots in a pot freeze much more easily than roots in the ground.
How Do You Propagate a Large White Petunia?
Large White Petunia can be propagated through seeds, stem cuttings. Similar propagation techniques also apply to petunia plant care, which shares the same genus.
Is the Large White Petunia Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Large White Petunia, 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 Large White Petunia?
Large White Petunia is susceptible to aphids, spider mites, whiteflies. 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.
Keep exploring plants
Large White Petunia 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 Petunia genus — compare its care with other Petunia species on PlantoScan.
Petunia is part of the Solanaceae plant family — browse all Solanaceae genera and species.
Large White Petunia thrives in bright light and direct sun — see other bright-light plants.
Related Plant Care Guides
Closely related plants with similar care requirements:
Sources
- Scientific name & taxonomy: Petunia axillaris (Lam.) Britton, Sterns & Poggenb., family Solanaceae (first published in Prelim. Catal. 38. 1888) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Large White Petunia, 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.
- 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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