Field ManualAll plants

Delavay tea olive
Osmanthus delavayi Franch.
Pet & Human Safety
People: No hazard foundPets: Not on the ASPCA lists as we read them
No ASPCA page for this species. Do not treat as pet-safe.
PlotAndPetal cannot tell you whether a plant you found can be eaten. Only someone who can see the plant can identify it.
Poison control
If someone has collapsed, cannot be woken, is having a seizure or has trouble breathing, call 911 now. For any other possible poisoning, call Poison Help: 1-800-222-1222.
Emergency number source: U.S. federal law (47 U.S.C. § 251(e)(3)), read 2026-10-07.
Naturalist Lore
Historical Background & Breeding Lore
The history of this plant and its name, and how it was bred, where we have them.
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- Hardiness zones
USDA 7a-9b per NC State Plant Toolbox; hardy to USDA zone 7 per Oregon State
- Light
Flowers best in full sun to partial shade; tolerates shade (NC State).
- Water needs
low low is a plain-language reading of NC State: drought-tolerant when established, with good drainage; Oregon State says well-drained soil. Always finger-test two inches down.
- Mature size
US: NC State: 6-12 ft tall and 6-12 ft wide; Oregon State: 6-8 ft tall and wider; UK: Trees and Shrubs Online: 6 to 20 ft; about 10 ft south of London and slightly over 20 ft in some Cornish gardens
How to prepare the soil, when and what to feed, and how and when to prune where that applies.
Get the app: coming soonAnatomy & Guilds
Botanical Anatomy & Characteristics
How the flowers and leaves are built and which pollinators visit, where we have them.
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Field Doctor
What can go wrong with this plant and what to do about it, where we have them.
Get the app: coming soonVintage Plates
Vintage Plates
Old botanical drawings from public libraries are in the app, for plants where we have them.
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