I have many starter sedum plants, have many rocks, starting this weekend. I have questions.
How do you prepare the base where the rocks, and plants rest on. How do you control the weeds from invading the area while keeping enough dirt to grow the plants.
2nd question....does the area have to be completely in sun.

Live in zone 5, (more like zone 4) in my opinion. Northwest suburb of Chicago, about 15+ miles from the Wisconsin border.

I'm putting in a request to transfer your question to the Rock Gardens forum here on NGA.

Most rock garden plants require good drainage......so it is important to encorporate course sand, or gravel into the base.
Other people here are more expert than I am, but it is gardening season and every one is slow on the forums.

The National Rock Garden Society has several good articles on building rock or crevice gardens from scratch. Also home made tufa containers.

Thanks, this was timely. I've been thinking of making some new garden areas using rocks and sempervivums with other succulents.

Oberon46 said:The National Rock Garden Society has several good articles on building rock or crevice gardens from scratch. Also home made tufa containers.

I think you mean North American Rock Garden Society

Thanks for the correction Rick. You are correct.