extension.umn.edu/managing-soil-...-perennial-beds
- A well drained, sandy loam soil with plenty of organic material is ideal for perennials.
- Most soils need amendments for growing perennial flowers.
- Compost, composted animal manure, peat moss and perlite are all commonly used organic materials.
- Organic matter increases a sandy soil's ability to hold water and nutrients.
- Organic matter improves a clay soil's structure, improves drainage and reduces stickiness.