A. General Requirements
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Age: When height, spread or caliper is specified the age of the plant is usually not required.  However, it may be used in listings or may be required by the purchaser.

All measurements are in metric units. The unit cm (centimetre) must be used to define all heights and spreads. The unit mm (millimetre) must be used to define all caliper measurements.

Botanical nomenclature used must conform with the publication Hortus Third, 1976 or with more current internationally accepted usage. See www.internationalplantnames.com for currently accepted names of woody plants.

Hortus Third, Liberty Hyde Bailey Hortorium 1976.

List of Names of Woody Plants, 2005-2010

Hillier’s Manual of Trees and Shrubs, 6th edition 1993.

Manual of Cultivated Broadleafed Trees and Shrubs, 3 volumes, Krussman, English edition 1984 - 1986.

Manual of Cultivated Conifers, Krussman, 1985.

Manual of Cultivated Conifers, Den Ouden and Boon, 1982.

Manual of Woody Landscape Plants, Dirr, 1990.

Manual of Cultivated Plants, Bailey, revised edition 1949.

Dictionary of Gardening, Royal Horticultural Society (four volumes), 1992

Manual of Cultivated Trees and Shrubs, Rehder, Second edition 1948.

Trees and Shrubs Hardy in the British Isles, beam, Eighth edition, Volumes 1 to 4, 1970 - 1980, supplementary volume 1988.

Hardiness: The designation of nursery stock shall conform to the hardiness zones of Canada as published by Agriculture Canada, titled, “Map of Plant Hardiness Zones in Canada”.

Nursery Stock must be true to name, and of the size or grade stated.

Packing or wrapping must be adequate for the protection of the stock and sufficient to prevent heating or drying out during storage and/or transportation.

Quality must be typical for the species when grown under proper cultural practices.  Fertile soil, ample spacing, weed control, pest control, adequate moisture, pruning and shearing, transplanting or root pruning not less than once in four years, depending on species, are all necessary requirements for normal quality nursery stock.  All nursery stock must be viable, substantially free from pests and disease, and undamaged.  Between digging and delivery, roots must not be exposed to drying winds, sun and frost.  Root balls must be free from pernicious perennial weeds.

Roots: All normal quality nursery stock must have an adequate fibrous root system that has been developed by proper cultivating practices, particularly transplantings or root pruning.  Pertinent facts as to when large nursery stock was transplanted or root pruned must be available to the buyer on request.

Scope: These standards apply to all plant material, specified herein as nursery stock, produced and/or offered for sale.

Sufficient labels or markings must be used to clearly indicate variety, grade or size of each specimen or bundle.

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