Natural Stone Landscaping Give character and style to your property with natural stone creations. From retaining walls to walkways and curbing, Johnston’s Greenhouse offers design and installation of natural stone features to make your garden and property look beautiful. We use armour stone in our installations. Armour stone is an excellent choice for a natural stone look for your garden or entryway. Character and style goes hand in hand with natural stone landscaping. Armour stone is commonly used for retaining walls, driveway and garden edging, pool and pond landscaping, and step grading. For questions or to discuss your natural stone needs, contact us today.