I made a rock garden to look like a rocky river bank of large white quartz and mixed colored rock. It is 2 foot square and 6 inches of drain rock covered with ground cloth and filled with premium potting soil. There is no shade and average temp. is 75 degrees 90 for up to 2 hours in summer. Some snow and lots of rain in winter. This is southwest Oregon, 25 miles from the ocean. Would astrantia, Major Hattie's pin cushion, masterwort be worth planting in this situation?
Astrantia Pin Cushion
Certified GKH Gardening Expert
Actually, astrantia plants normally perform best in moist, shady conditions. You will want to find something suitable for full sun and possibly even drought and heat tolerant. these articles should help with suggestions: https://www.gardeningknowhow.com/ornamental/flowers/fgen/full-sun-plants.htm