Q.getting sedum to grow
How can I get sedum to live after planting flats of John Creech sedum? Twice I have tried planting John Creech sedum as ground cover between stepping stones. The soil is 80% sand and 20% soil. In spring, I sprinkled 2 times a week. It died. I tried again and watered it 3 times a week in 90 degree weather. Most has died. Now it is fall and I want to try again. I will add soil to the sand. What percentage should I have? What else can I do to get sedum to grow? There is a weed barrier 3 inches down. Should I remove the weed barrier?

You should follow a regular watering schedule during it's first growing season.
The weed barrier is likely an issue for the root system of the plants, this is more of an issue than the soil mixture.
Sedum can tolerate most soil conditions.
Here are some links for you with more information.
The cooler fall should be an easier time to start new plants.
https://www.gardeningknowhow.com/lawn-care/lawn-substitutes/sedum-lawn/lawn-care-for-sedum.htm
https://www.gardeningknowhow.com/lawn-care/lawn-substitutes/sedum-lawn/lawn-care-for-sedum.htm
