Cain Greenhouse is proud to be a family-owned and operated greenhouse and plant nursery, located in Merrill, Wisconsin. We are proud to say we grow every single open-pollinated (over half are heirloom!) plant from seed, by hand, by the owner herself. All items are grown without pesticides, sprays, chemicals, fertilizers, etc.- just sunshine, water, and care. We strive to give each plant love and attention, as if we were going to plant it in our own gardens and give the food to our children. 

We offer fruit and vegetable starts, annual and perennial bedding plants, WI native flowers and grasses, climbing flower arrangements, herb starter plants, and flower and fruit hanging baskets. A small selection of seeds from High Mowing Organic Seeds is available as well. We also have a collection of crafts- including wind chimes, spinners, feeders, bird houses, and much more. A self-serve area of Hsu's soil and mulch in the parking lot is available throughout the year, available at your convenience. 

All of our plants are rated for zone 4 by our seed suppliers, unless noted, so you can feel comfortable growing them in the harsh Wisconsin winters. Our WI native plants are available both as seedlings and one year old perennials. The one year old perennials are over-wintered by us, so they are regionally adapted to our climate.

We often have posts and videos shared both on Facebook and Google of how we collect and save our seeds, planting and gardening practices we use, and other helpful suggestions to make your garden techniques more sustainable. 

✨New things we are offering for 2026 ✨

🌻Cain Greenhouse will have a you-pick field full of gorgeous flowers! Flowers will be available throughout the growing season, available by the stem, at your convenience. 

🤓 Cain Greenhouse held its first ever gardening class this past winter! Stay tuned for future classes.