Catmint, hardy geraniums, and perennial salvia are allium companion plants that hide yellowing leaves while keeping the flowers visible above the border.
Essential Concepts: Choose well-drained soil; leave foliage until fully brown.
Related posts: Allium care (https://www.rhs.org.uk/plants/allium/growing-guide); salvia care (https://www.rhs.org.uk/plants/salvia/growing-guide).
