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You may already have an idea of where you want your living wall to be, but you should take into account other considerations, like the weight of your living wall, the amount of sunlight your wall gets throughout the day (and year), and removal or disposal concerns.  Even if you're someone who has a green thumb, at some point one of your plants may need to be replaced. In this case, a living wall close to a door outside can prevent dirt or decayed plant matter from being tracked through your house. Take a stud finder and make sure your wall has weight bearing studs. Even the weight of a single plant with its roots saturated with water may be enough to pull your living wall free from wall anchors. Fastening your living wall firmly to two studs should prevent this. Imagine your living wall at different times of the year. For example, you may find that an outdoors living wall looks less desirable in the winter months if you live in a temperate climate. A living wall close to a large window might also be negatively impacted by cold during cold months. There are many companies that provide prefabricated wall-hanging frames in which you can plant your living wall. Some models are even freestanding, creating a kind of living wall partition in your home, which might be suitable if you do not have load bearing studs to fasten your living wall to. You can also fashion your own living wall simply enough with wood, plastic sheeting, and a plant friendly fabric. Use a pencil and a tape measure to mark the dimensions on the wall you intend your vertical garden to be and note these down. These measurements will be important whether you are buying a pre-made living wall or making your own. You might also want to mark the spot on the wall you've found studs. This way, when it comes time to hang your living wall, you can do so easily and without interruption.
Evaluate placement options for outdoor and indoor living walls. Decide on a pre-made kit or the DIY route. Measure and mark the space you wish your living wall to occupy.