Sioux Valley Greenhouses has been in business for over 35 years. Dean and Lori Seim have owned and operated it since 2002. Our main location is at 2021 Sioux Conifer Road on the corner of Hwy 20 and Sioux Conifer Road. In the spring we open a satellite location in the County Fair parking lot in uptown Watertown. We offer a wide variety of annuals, perennials, trees, shrubs, pottery, garden accents, fountains, tools, garden pest and growing solutions along with custom container planting. Are landscape department does it all design, installation and maintaince of irrigation, grass, trees, shrubs, perennials, concrete edging, paver patio's, retaining walls, ponds and more.