Birdbaths - no matter how big or small - make great garden decorations. You can even find portable and lightweight birdbaths that are suitable for small apartments. In case your nature lover is a city dweller and can't find birds around, the birdbath can be used as decorative centerpiece that contains floating flowers and candles.
You've probably heard of art from waste, and fairy gardens take this idea to a whole new level. Broken pots and planters can be transformed into dramatic miniature gardens and landscapes with just a few accessories. These are not just great to look at, but also a unique gift; especially in case of a space crunch. You can present your nature-loving friend with either a ready-made fairy garden or accessories so that he/she can make one for himself/herself.
Having an indoor garden with little to no maintenance is every nature lover's secret dream. A terrarium is the next best thing. It is modern, affordable, and easy-to-maintain indoor miniature garden that is built in a beautiful glass container. They require very little space and can be kept anywhere at home; as the plants that are used, often don't require any sunlight or much watering. Perfect for any nature lover living in a city.