The Legislature finds that:
(1) nursery stock can harbor and vector plant pests and diseases;
(2) unregulated production and shipping of nursery stock presents an unacceptable risk to the state's agricultural, forestry, and horticultural interests, and to the state's general environmental quality; and
(3) it is necessary to ensure that nurseries produce healthy plants and that nursery stock shipped to other nurseries, brokers, and out-of-state customers meets national nursery stock cleanliness standards.