Osmanthus fragrans, the fragrant tea olive, is a shrub rather than a typical houseplant. The RHS plant details says it is best grown in a temperate greenhouse outside mild areas, and the NC State Extension Gardener Plant Toolbox says that in cooler climates it can be grown in containers and overwintered indoors or as a houseplant. Both describe highly fragrant white flowers, in autumn according to the RHS and in early spring and fall according to NC State.
What the sources say about flowers and scent
The RHS describes small clusters of highly fragrant, tubular white flowers in autumn, and sometimes in spring and summer. NC State says small, very fragrant white flowers appear in early spring and again in fall, and says they smell like apricots. NC State also says flowers form on the previous season’s growth, so pruning can reduce next year’s bloom, and that frost damage reduces the following fall’s flowering.
Light, water and feeding
The RHS says to grow it in full light with shade from hot sun under glass, using peat-free loam-based compost, to water freely and feed with a balanced liquid fertiliser monthly while growing, and to water sparingly in winter. NC State says full sun to partial shade, that it is drought tolerant once established but needs supplemental water in hot, dry months, and that it prefers moist soil with good drainage.
| Topic | RHS | NC State |
|---|---|---|
| Light | Full light, shade from hot sun under glass | Full sun to partial shade |
| Water | Freely while growing, sparingly in winter | Drought tolerant once established; extra water in hot, dry months |
| Feeding | Balanced liquid fertiliser monthly while growing | Not covered |
| Cold | Hardy in coastal, mild parts of the UK; elsewhere a temperate greenhouse | Frost sensitive; zones 8a to 11b |
| Pests | Generally pest-free; may suffer honey fungus | Aphids and scale |
Size and houseplant limits
The RHS gives a height of 2.5 to 4 metres and 10 to 20 years to maturity, while its description says up to 5 metres, so the figures conflict. These describe the plant’s potential. The RHS does not call it a houseplant, only a conservatory or greenhouse plant. Neither source gives an indoor temperature, a pot size or an indoor light figure.
Pruning and pests
NC State warns that pruning can reduce next year’s flowers because they form on last season’s growth. The RHS puts it in pruning group 9 without further detail. Aphids and scale are the pests NC State names, and the RHS describes the plant as generally pest-free. For general pest handling indoors, see Gardenia Pests Indoors, which uses Colorado State guidance that applies to most houseplants.
Pets
I could not confirm an ASPCA entry for Osmanthus, and neither extension page addresses toxicity, so treat it as unconfirmed. See Pet-Safe Fragrant Houseplants for how to check a plant.
Frequently asked questions
Can osmanthus be grown as a houseplant?
NC State says it can be overwintered indoors or grown as a houseplant in cooler climates. The RHS lists conservatory and greenhouse use.
When does osmanthus flower?
The RHS says autumn, and sometimes spring and summer. NC State says early spring and fall.
Should I prune osmanthus?
Be cautious. NC State says pruning can diminish next year’s flowers because they form on old growth.
How cold can it get?
NC State calls it frost sensitive. The RHS rates it hardy in coastal, relatively mild parts of the UK. Neither gives an indoor minimum.
Sources read for this page
Last reviewed 15 October 2026. Written by Md. Firozur Rahman. This page gives general guidance; see the Disclaimer. Browse more in Bloom & Fragrance.
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