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How to Winterize Lily-of-the-Valley

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How to Winterize Lily-of-the-Valley

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Lily of the Valley in bloom image by Kurt Steuber:commons.wikimedia.org

Overview

Lily of the valley, known botanically as Convallaria majalis, is a spring flowering ground cover plant that emanates from underground rhizomes called pips. Lily of the valley thrives in nutrient-rich moist soil in partial to full shade exposures. Full sun exposures are tolerable only in cooler northern climes. Hardy in USDA Zones 4a through 9b, lily of the valley is very low maintenance plant and can be prepared for winter and next spring's bloom with just a few minutes work in the fall garden.

Step 1

Prepare lily of the valley for winter beginning in October by cutting back any dead or diseased foliage that you may see. For small stands of plants, all of the top foliage can be cut back to the soil level to keep the garden looking tidy. Shearing the foliage off is not necessary as the leaves with either remain green or die back of their own accord, depending on your climate. For large or naturalized stands of lily, cutting back is impractical and you should just let the foliage remain to feed the soil.

Step 2

Mulch over the top of the lily of the valley plants with a 1-inch thick blanket of compost or well aged manure, or a combination of the two. Lily of the valley loves rich humus and the mulch in combination with the foliage will boost the nutrient value of the soil over the winter. A dose of bulb fertilizer or granular slow release fertilizer can be mixed into the compost and manure at the same time to provide an even richer soil for next season's plants.

Step 3

Dig, divide and relocate the lily of the valley pips in the fall if they have become overcrowded in their space or if you want to create a larger stand. Carefully excavate widely around the rhizome with a hand trowel until you can easily lift the rhizome from the soil. Break or cut the rhizome into pieces with one eye or pip per piece. Bury the individual pieces pip side up 1 to 2 inches deep and 4 to 6 inches apart. The pips will establish themselves over the winter and spring.

Tips and Warnings

  • Despite the sylvan setting its name conjures up, all parts of the lily of the valley plant are toxic to humans and many mammals. Grazing animals should be kept away and these should not be planted on or near pasture land.

Things You'll Need

  • Scissors
  • Compost
  • Well-aged manure
  • Granular fertilizer

References

  • Nazareth University
  • Easy to Grow Bulbs Guide
  • USDA Plant Database Profile
Keywords: lily of the valley, flowering perennial pips, convallaria majalis

About this Author

A communications professional, D.C. Winston has more than 17 years of experience writing and editing content for online publications, corporate communications, business clients, industry journals and film/broadcast media. Winston studied political science at the University of California, San Diego.

Photo by: Kurt Steuber:commons.wikimedia.org

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