How to Winterize Snow Trillium

Snow trillium. image by Cochise, Morguefile


Snow trillium is a hardy plant that grows in the northeastern U.S. woodland forests. This plant blooms with a brilliant white flower. Snow trillium prefers a shade environment and rich soil with significant organic materials. Since these plant grow in the wild in cooler U.S. climates, snow trillium is in high demand as a shade garden perennial. Trillium blooms early in the spring, often while snow still covers the ground. These plants can tolerate extreme temperatures. Proper care will help the snow trillium continue blooming for many years. Let's look at how to winterize snow trillium.

Step 1

Care for your snow trillium plant throughout the spring growing season properly. Provide organic-based soil and a shade environment. These plants prefer damp, woody areas with dappled shade. Mature plants reach 18 to 24 inches in height and often spread to encompass a wide area of the garden when left alone to expand and grow.

Step 2

Move any plants growing under evergreens to a new location. Snow trillium cannot compete with this type of plant for soil nutrients and water.

Step 3

Do not prune this plant after flowering. Blooms appear in early spring, often while snow still covers the ground. The plant's strength lies in its ability to spread rhizomes (underground stems) to produce foliage.

Step 4

Leave the foliage to die at the end of the growing season. Any dead leaves will decompose and function as additional organic compost.

Step 5

Cover the plants with a 4- to 6-inch layer of organic mulch such as compost or mulch. Both provide organic nutrients to enrich the soil. This mulch layer protects the plant during the cold winter months.

Things You'll Need

  • Mulch (compost or shredded bark)


  • Plant
  • Pennsylvania Natural Heritage Program
  • USA National Phenology Network
Keywords: snow trillium, winterize snow trillium, trillium

About this Author

S.F. Heron is an avid gardener with over three years of experience in online writing and a working background in aviation and earth and ocean sciences. She is published on various websites and holds a Bachelor of Science degree in journalism from the University of Maryland.

Photo by: Cochise, Morguefile