Declares it is the goal of the legislature that the Washington park arboretum's collections, exhibits, and facilities be preserved, maintained, and presented in a manner befitting one of the world's most prestigious plant collections.

Creates the University of Washington botanic gardens endowed curatorship.

Creates the University of Washington botanic gardens endowed curatorship account.

Provides that, until June 30, 2013, the state treasurer must release one million dollars from the University of Washington botanic gardens endowed curatorship account to the University of Washington board of regents for inclusion in the University of Washington consolidated endowment fund when both: (1) The University of Washington board of regents requests that the funds be released; and

(2) The University of Washington demonstrates to the treasurer that it will match the state funds with an equal amount of funds contributed by nonstate sources for the University of Washington botanic gardens endowed curatorship.

Requires the department of natural resources' natural heritage program to host a working conference on the future of arboretums and botanic gardens in Washington.