Some of the apartments have gardening options and potential. Station can imitate sunlight well enough for plants to grow. In space, people had water rations, and plants were expensive, in regards to how much of your water ration it would take to nourish one. However, planetside, we're better connected to sources of water. So that should be less of an issue.
The windows in apartments are just to other parts of Station. By virtue of its design, with the exception of the Botanical Gardens, it was best to limit weak points that could be exposed to a vacuum.