The open plant encyclopedia

Know any plant.
Grow it well.

Snap a photo or search by any name to see how to care for it, where it comes from, whether it's safe, and a 3D model you can turn.

What's growing around me?

13,000+plants with full pages
365,000+plant species worldwide
220+countries covered

Common in

See all

The plants people record most in your country, and ones that grow there wild.

What do you want to do?

Popular plants

Browse all plants

See them in 3D

All plants in 3D

Browse plants

Filter by what you want to do, shape, origin, country, care and safety.

Has a real 3D model

Plant Wiki › Browse plants

Southern Indian Azalea

Rhododendron indicum

In Singapore: Macranthum Azalea, Azalia, Indica Azalea, 皋月杜鹃 (Grown in Singapore)

Rhododendron indicum is a compact evergreen azalea from Japan, widely grown in gardens and as a flowering pot plant. Give it acidic, well-drained soil and part shade, and keep the root zone moist but never waterlogged.

Family: Ericaceae (Heather family)
Grows as: Shrub
Light: Part shade, Bright indirect
Water: Keep the root ball evenly moist, using rainwater or soft water where possible, and let the top layer dry slightly between waterings.
Soil: Acidic, humus-rich, well-drained ericaceous mix.
Temperature: 10–24 °C; protect below about -5 °C outdoors.
How easy: Moderate
Safety: Toxic: All parts contain grayanotoxins, which can cause vomiting, drooling, low blood pressure and weakness if eaten; honey made from its nectar can also cause poisoning.. Toxic to cats and dogs (ASPCA).
Native range: Japan (W. & C. Honshu, Kyushu)
Climate: temperate

About

Rhododendron indicum is an azalea Rhododendron species native to Japan (S & W Honshu, Shikoku, Kyushu, Yakushima).

Other Rhododendron plants

Rhododendron album · Rhododendron anthopogon · Rhododendron argyrophyllum · Rhododendron augustinii · Rhododendron bureavii · Rhododendron calophytum · Rhododendron calostrotum · Bell Flowered Rhododendron · Bent-style rhododendron · Rhodora · Catawba rosebay · Georgian Snow Rose

[Contains information from Leaf Area Index (LAI) and Heritage Trees from data.gov.sg (National Parks Board), made available under the terms of the Singapore Open Data Licence version 1.0]

Text excerpted from the Wikipedia article Rhododendron indicum by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.

The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.

Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.

Pet safety from the ASPCA toxic and non-toxic plant lists.

Credits & terms

Know any plant.Grow it well.