Dominion Arboretum

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Dominion Arboretum along the Rideau River in Ottawa.

The Dominion Arboretum is an arboretum located in the Central Experimental Farm in Ottawa, Ontario, Canada.

Originally begun in 1886 on the east side of Highway 16 as an experimental farm with the intention of evaluating the hardiness of trees and shrubs, the Dominion Arboretum never developed along taxonomic lines. This has resulted in a more interesting display for the public as the flowering is not concentrated in any particular spot. The arboretum is open from dawn to dusk and the admission is free. The Dominion Arboretum maintains an extensive herbarium.

Although the climate of the area is Zone 5a, the northeast corner has its own microclimate and is warmer by one zone allowing for a collection of magnolias, azaleas, Metasequoia, and several fringe trees. One of the favourite attractions for tourists is the Ornamental Garden. In this one area are located the annual plant display, perennial borders, lilac walks, roses and hedges. The hedge collection was planted between 1966 and 1968 and contains everything that is suitable for use as a hedge and is one of the most popular features of the arboretum.