1. You can paint it better than it actually looks (a few more roses here, a few less weeds there...)
2. Unlike a public garden, you likely won't get taken unawares by the sprinkler system.
3. You are intimately familiar with how the light travels through the garden at different times of the day.
4. You are intimately familiar with the location of the latrine (and more than likely it will be free and fairly clean.)
5. You can leave all of your gear set up during breaks (and probably won't need to get someone to watch your stuff as you break for the above mentioned latrine.)
6. You can do your part to reduce the carbon footprint (no need to drive anywhere.)
7. Forgetting to pack an important supply is easily remedied.
8. Plenty of opportunity to take weeding and pruning breaks (okay, this might not be such a good thing for your painting, but your garden will love it.)
9. You won't look like a crazy lady wandering through the park staring at trees, with luggage, a big floppy hat, and a compass. (You'll just look like a crazy neighbor wandering around her yard with luggage, a big floppy hat, and a compass.)
10. The reception to the wireless baby monitor extends just to the edge of your yard!

This little painting is kind of a cross between a still life and a plein air painting. The Japanese lantern sits at the corner of my garden under the limelight hydrangea (hence the title.) Since the hydrangea isn't yet in bloom, I've punched up the corner with some potted geraniums.