4.
Council Directive 98/56/EC of 20 July 1998 on the marketing of propagating material of ornamental plants · European Union
In the case of flower bulbs the following requirement shall also be met: the propagating material shall be derived directly from material which, at the stage of the growing crop, has been checked and found to be substantially free from any harmful organisms and diseases, signs or symptoms thereof.
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Source: EUR-Lex (Cellar) · retrieved 2026-11-08 · Text as adopted (Official Journal); later amendments are not incorporated in this text.