To enjoy gardening yo do not need half an acre in your back yard. You can (and a lot of people do) grow plants, flowers, fruit and vegetables in any size, any shape of garden containers. You can (and I currently do) use plastic buckets to grow food on your patio. You can nurture growing things in literally any environment or location in and around your home.

Vertical Gardening

Intro to Container Gardening

Gardening simply does not allow one to be mentally old, because too many hopes and dreams are yet to be realized.

— Allan Armitage