Landscaping supply store. L. St. Amand Enterprises Inc. offers one of Niagara's largest inventories of landscaping materials and supplies. With more than 70 years of experience, we have gained a reputation for fast, reliable service. Our full-service showroom provides product samples and design ideas for landscaping projects. L. St. Amand Enterprises Inc. specializes in stone products, soils, mulches, pond supplies, and more!