Never too late to start a garden. Depending on where you are, you can still plant lots of different things. You can also plant a fall veggie garden. Broccoli, cabbage, other cole plants do well then. Also can plant another crop of peas for fall. Also, same for flowers and herbs. Obviously, you can't plant spring bulbs now (gladioli), since they just won't come up well this year. But this fall, you can plant the fall bulbs - Daffodils, tulips, etc. You might want to pot the herbs so you can bring them inside when cold weather hits.
Not knowing where you are, I can't be more specific. Nor do I know your preference in flowers or veggies.
Some years back, when I moved in May to a mobile home in a mobile home park, I had a nice large back yard where I put in a garden. The first year it was kind of small, but I added to it each year, and eventually it was about 30 x 30.
at 6:26 PM on May. 25, 2009