Creative growth
If you haven’t got much outdoor space at all, or a strangely shaped garden, there are plenty of creative ways that you can grow your plants. Consider attaching planters to your wall, and growing vertically.
Alternatively, you could have a multi-tiered planter on your patio, with greenery popping out at various levels. Adding a rockery also uses more of the vertical space to create an interesting and relaxing vista. Perhaps you could even add a small pond.