Trees and Shrubs Online

The International Dendrology Society’s online reference for cultivated temperate trees and shrubs, with commissioned genus and species accounts that connect botany, garden performance, distribution, and cultivation.

What you'll find here

Specific data we draw from it: species accounts, cultivation constraints, hardiness context, cited botanical and horticultural references.

Good to know

Author-attributed species accounts. Each account identifies its author and recommended citation, so carry the species-page URL and author with the factual claim rather than citing the homepage alone.

Heat evidence. Where a species account names summer heat, drought, or a regional climate as a cultivation failure, preserve the condition as evidence; do not convert a USDA hardiness label into an AHS heat range.

How to cite this source

Cite the exact species account and preserve its author, year, access date, and the Trees and Shrubs Online URL. Attribute the International Dendrology Society and the article author; use the account’s recommended citation where available.

License

Trees and Shrubs Online content is CC BY-SA 4.0. Attribute the International Dendrology Society and the article author, link to the source and licence, indicate changes, and retain compatible share-alike treatment for adapted material.

This is a curated temperate-woody-plant reference, not a universal climate database. Its heat and drought observations must be read as stated regional cultivation limits; do not infer a numerical AHS range from USDA or RHS hardiness alone.

Cited by 1 plant

Cited by wildlife

No wildlife record cites this source yet.