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Sometimes in early Spring after bulbs have emerged from the ground and are beginning to flower, a sudden cold snap will bring temperatures down below freezing for a few days. More often than not, I’m amazed at the resiliency of these hardy plants. We are experiencing a cold scap in the northeast and we had snowfall on two consecutive nights earlier in the week in our Zone 6 region.
The exact effect caused by a sudden cold snap depends on a number of different factors, including the type of plant, regional location, temperature and length of snap. Remember, cold snaps are defined as a short and sudden spell of cold weather; therefore, the temperatures should rise back to their normal levels within a couple of days.
Daffodils— There are many varieties of daffodils, all of which blossom in spring. When a cold snap approaches, gardeners are oftentimes fearful of the effects it will have. Like tulips, however, daffodils are naturally protected against mild-to-moderate cold snaps. If you believe the freezing temperatures are going to last longer than expected, you can place some extra mulch around the base of your daffodils for an added layer of thermal protection. Once the temperatures begin to rise again, though, you’ll need to remove the mulch so the daffodils can easily breathe again.
Tulips— Because they bloom early in the spring, tulips can handle short cold snaps with ease. As long as the temperatures go back within 48 hours, they won’t suffer any serious damage. A tulip’s shoots and buds are usually the most protected from the cold, as they have a natural barrier against the cold weather. On the other hand, tulips with open blossoms may experience a slight burn from the freezing temperatures, especially if it lasts for longer than 48 hours.
Hyacinth— Hyacinth is a plant that’s native to the eastern Mediterranean, Iran and Turkmenistan, but it’s since been successfully introduced into several other regions. This bulbous flowering plant blooms with bright purplish blue coloring that’s a welcomed addition to any garden. So, how well does hyacinth handle short spells of cold weather? Some gardeners will find they do quite well, while others may experience their plants going into shock. Hyacinth is considered a spring-blooming flower, but this doesn’t necessary mean they will withstand freezing temperatures. The best thing you can do in the event of sudden cold snaps is to protect hyacinth with extra mulch for additional warmth.