How to Grow Pieris Japonica

Overview

Having the same growing requirements as rhododendrons and azaleas, the Japanese pieris (Pieris japonica) is also sometimes called the lily-of-the-valley shrub because of its chains of tiny white flowers. Beautiful in the garden either planted in the ground or in containers, the foliage looks elegant year round, and the flower buds and flowers add interest from fall to spring.

Step 1

Locate a spot in the garden to plant your Japanese pieris that is sunny to partially shaded and where it will receive between four and eight hours of direct sunlight each day. In hot summer areas, a little shade from a tree or building is beneficial in the hottest part of the afternoon.

Step 2

Dig a hole for planting that is the same depth as the root ball of the shrub purchased at the garden nursery but twice as wide.

Step 3

Place the shrub into the planting hole and backfill the hole with the soil, making sure the root ball is at the same depth or 1 inch higher than the top of the planting hole. Water the plant to allow the soil to settle. Create a small berm around the plant to create a "moat" to retain water the next time you irrigate.

Step 4

Scatter a layer of organic mulch such as pink bark, pine straw or oak leaf mold around the base of the Japanese pieris to a depth of 3 to 4 inches and as wide as 12 inches beyond the ends of the branches.

Step 5

Prune the shrub only after the flowering ends in spring. Prune errant branches to 1/4-inch above another branch, leaf or dormant bud. Do not prune after midsummer, as you will be removing flowers for next spring.

Step 6

Scatter an all-purpose, granular, slow-release fertilizer, such as 10-10-10, over the root zone in spring each year. Consult the product label directions for dosage.

Tips and Warnings

  • Pruning branch tips after July will reduce flowers next spring. The thread-like flower buds are formed and elongated, becoming more ornamental as the summer and fall progresses. Rarely does this shrub need pruning to look its best.

Things You'll Need

  • Shovel
  • Organic mulch

References

  • National Gardening Association: USDA Hardiness Zone Finder
  • "Dirr's Hardy Trees and Shrubs"; Michael A. Dirr; 1998

Who Can Help

  • Learn2Grow: Pieris japonica
Keywords: Japanese pieris, andromeda, broadleaf evergreens

About this Author

James Burghardt has written for "The Public Garden," "Docent Educator," nonprofit newsletters and for horticultural databases, becoming a full-time writer in 2008. He's gardened and worked professionally at public and private gardens in Colorado, Florida, Minnesota, New York, North Carolina and Pennsylvania. He has written articles for eHow and GardenGuides.