Field ManualAll plants

Mint bush
Prostanthera Labill.
Family: Lamiaceae
Pet & Human Safety
People: No hazard foundPets: Not on the ASPCA lists as we read them
Not assessed for pets. 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.
Get the app: coming soonCare
- Hardiness zones
Not checked yet
- Water needs
The level is a plain-language reading of the source wording cited. Always finger-test two inches down.
- Mature size
Species examples: P. aspalathoides 0.3 m to under 1 m (ANBG); P. ovalifolia 2-3 m high, 1.5-2 m wide (Botanic Gardens of SA); P. lasianthos usually about 5 m, from 2 m on exposed mountain sites to at least 10 m (ANBG).
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.
Get the app: coming soonField Doctor
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.
Get the app: coming soonSources
- VicFlora (Royal Botanic Gardens Victoria) - Prostanthera (genus)
- Australian National Botanic Gardens - Growing Native Plants: Prostanthera aspalathoides
- Australian National Botanic Gardens - Growing Native Plants: Prostanthera lasianthos
- Botanic Gardens of South Australia - Plant Selector: Prostanthera ovalifolia
- Kew POWO/WCVP - accepted-name record
- ASPCA Toxic and Non-Toxic Plants list