Q.Russian Sage. When is the best time to plant it? What type of soil it prefers. What are its weaknesses. How long does it take to
grow from seed to a metre high plant. We are living in the south of France near Beziers, so the climate is very different from the U.K.
Certified GKH Gardening Expert
Late spring is perfect for planting Russian sage. These plants love sun and heat, so your location sounds great. Make sure the plants have low-humidity conditions and relatively dry, well-drained soil. I don't see that it has any particular problems. Here's an article that may be helpful: