Garden Valley Ranch is a historic landmark in Petaluma that traces its origins back to the late 1800's. This working rose farm cultivates 8,000 rosebushes over five acres of beautiful fields and gardens. Our world renowned garden roses bloom from May through October. Landscaped plantings featuring roses on pergolas, columns, arches and carefully selected perennials, annuals and bulbs combine to create a truly magical setting. Garden Valley Ranch also enjoys a large koi pond, water fountains and numerous special events and arts & entertainment throughout the year.