Perennials often stay in the same location for years. This means that selection and preparation of the site for new plantings are vitally important. Organic matter worked into the soil at planting time can provide nutrients and improve aeration and drainage.

For perennials that require annual fertilization, apply in spring as new growth begins. Broadcast one pound of 5-10-5 or 6-12-6 over 100 square feet of area. Make another one-pound application eight weeks later. Wash off any fertilizer that remains on the foliage. Astilbe, chrysanthemum, delphinium, lupines, and summer phlox are perennials that should be fertilized annually. It is always best to follow recommendations of a soil test. Test soil every three years.

Improving soils in existing perennial beds can be a challenge. Click here for ideas.