The 3,200 square foot Dutch Sun Valley Greenhouse serves multiple purposes. It is used primarily for plant propagation. Plants grown in the Sun Valley Greenhouse and Warmuth Family Propagation Garden are used for fundraising plant sales and to fill HBG beds. The greenhouse also functions as a classroom for the HBG Education Series, for exhibitions and as a center for the docent program. Lastly, the greenhouse is used as an event space for both HBG and private events.