A little goes a long way.
Although there are no hard, fast rules governing the proper non-botanical ornamentation of gardenry, there are certainly a few guidelines I think we can all basically agree on:
1. Less is more.
2. Herds of fake deer? Not so much.
3. Tires, painted or otherwise: Skip it, dude.
4. Did I mention, apply sparingly?
5. There is really no situation in which a cartoonish lawn jockey is OK.
Here are a few examples from the Halcyon Garden. A few are almost tasteful. Others provide comic relief. You be the judge:
Related post: Tour the Halcyon Garden, if you dare.