Daisies are a beloved addition to gardens. Their ability to withstand colder months depends significantly on the specific type of daisy and the climate in which they are grown.
Understanding Daisies and Winter
Daisies include popular types like English daisies (Bellis perennis) and Shasta daisies (Leucanthemum x superbum). Most common garden daisies are herbaceous perennials; their foliage dies back in winter, and root systems survive underground by entering dormancy. Daisies generally thrive as perennials in USDA hardiness zones 5-8, where they can tolerate temperatures down to approximately 20°F (-6°C) or even 28°F (-2°C) for some varieties. In colder zones, some daisy types may behave as annuals.
Winterizing Outdoor Daisies
To prepare perennial daisies planted in the ground for winter, prune stems to about 1-2 inches (2.5-5.1 cm) above the soil line after the first hard frost causes foliage to die back. Cutting daisy stems to about 1-2 inches (2.5-5.1 cm) above the soil line is a common practice, though some gardeners opt to leave taller stems for winter interest or to provide some natural protection. Removing dead or yellowed foliage also helps prevent disease.
Apply a protective 2-3 inch layer of organic mulch (straw, leaves, or pine needles) over the plant’s crown to insulate roots. This mulch maintains consistent soil temperatures and protects against frost heave, the upward movement of soil from freezing and thawing that can damage roots. Watering before the ground freezes is important; moist soil retains heat better than dry soil, helping to insulate roots. Ensure the soil is well-drained to prevent root rot.
Caring for Potted Daisies in Winter
Potted daisies require different winter care. In colder climates, bring them indoors to a cool, unheated space like a garage or basement; they do not need light during dormancy. If treating them as houseplants, provide bright, indirect light and maintain moderate temperatures, ideally around 40-70°F (4-21°C).
Watering needs are reduced for dormant potted daisies. Water infrequently, allowing the top inch or two of soil to dry completely between waterings. Overwatering is a common issue for potted plants in winter and can lead to root rot. Ensure pots have adequate drainage holes. For pots left outdoors in milder climates, group them in a sheltered location and wrap containers with burlap or bubble wrap for insulation.
Winter Blooming Daisy Alternatives
While common daisies are not typically winter bloomers, some plants offer a similar appearance and provide color during the colder months. Christmas Roses (Helleborus niger) are excellent alternatives, blooming from late fall into mid-winter with white flowers. These hellebores are hardy perennials that thrive in USDA zones 4-9 and offer evergreen foliage. Certain types of Chrysanthemums can also provide late-season or mild-winter color, though their hardiness varies.
Spring Revival for Daisies
As spring approaches, prepare daisies to emerge from dormancy. Once the danger of hard frost has passed, gradually remove any heavy mulch applied for winter protection. This allows the soil to warm and new shoots to emerge. Apply a balanced, slow-release fertilizer or compost around the base as new growth appears. Resume a regular watering schedule, ensuring the soil remains consistently moist but not waterlogged, to support vigorous new growth and flowering. Monitor for emerging foliage.