Russian sage volunteered and got rescued by me. How could I resist? It clearly says "I feel well here!". 2 years ago I moved the mother plant and new russian sage appeared 5 meters away. Are concrete bricks so comfy to grow? No. Maybe they give enough warmth and shelter to russian sage seeds?
Even if seeds are comfy among bricks, the plant is not. I decided to rescue this wonderful and amazingly fragrant plant. Lift brick using weeder is not easy, but plant must be happy. The stem was completely flat! Poor thing - no space to grow. Now, temporarily it found good place in the pot.
Russian sage - Perovskia atriplicifolia