Greetings, yes the planters do "straddle" the wall on both sides. It is a pretty common design for garage rooftop decks. We love the use of planters in urban gardens. It allows us to incorporate all season interest, using various plantings throughout the year.

Gorgeous space. Would you be able to share the wood used for the pergola and the stain, please?

Hello, The wood is Pressure treated pine( Pressure-treated lumber is wood that has been immersed in a liquid preservative and placed in a pressure chamber.)
It has a dark brown stain. With any wood staining, we always recommend putting samples down on the actual wood. All wood accepts stain differently. To get the perfect color you are looking for this is the best route to take. You can get small sample jars of various stain colors and have fun experimenting until you get the desired color.

Thank you!

what type of stain do u recommend for durability and look? clear, semi transparent, or semi solid?