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How to Prune Agapanthus

By Kay Dean ; Updated September 21, 2017

Agapanthus, also known as African blue lily, produces dark green, star shaped leaves that grow upwards to 20 inches long. In produces rounded heads of blue or white flowers from stems that grow 39 inches or taller. When it comes to agapanthus, there is a different thought between deadheading and pruning.

Deadhead the agapanthus after the flowers fade, for a uniform look in the garden. Cut off the spent flower stems and remove dead leaves. As long as they are not diseased, add the flower cuttings to the compost.

Leave the seedheads for a natural look. According to Shoot, there is “no need to cut down in the autumn, as the seedheads look attractive over winter.”

Cover the agapanthus’ crowns over the winter with a thick layer of mulch or dry leaves. This not only protects the crowns, it keeps the soil moist, warm and enriched.


Things You Will Need

  • Gardening shears
  • Mulch or dry leaves

About the Author


After attending Hardin Simmons University, Kay Dean finished her formal education with the Institute of Children's Literature. Since 1995, Dean has written for such publications as "PB&J," Disney’s "Family Fun," "ParentLife," "Living With Teenagers" and Thomas Nelson’s NY Times bestselling "Resolve." An avid gardener for 25 years, her experience includes organic food gardening, ornamental plants, shrubs and trees, with a special love for roses.