Mountain laurels, also known as Texas mountain laurels (Sophora secundiflora), are indeed hardy shrubs that can survive freezes. These native evergreen plants have adapted to the harsh climate of Texas and are known for their resilience. While hard freezes below 20 degrees Fahrenheit can eliminate the blooms of mountain laurels, the plants themselves are typically not killed by these cold temperatures.
One of the remarkable characteristics of mountain laurels is their resistance to cotton root rot fungus, a deadly disease that affects a wide range of landscape plants in Texas. This resistance is a valuable trait, as it helps ensure the survival of mountain laurels in areas where other plants may succumb to this destructive fungus. This resistance makes mountain laurels a popular choice for landscaping in Texas, particularly in regions where cotton root rot is prevalent.
In my personal experience, I have seen mountain laurels withstand freezing temperatures and bounce back with vigor once the weather warms up. During a particularly harsh winter, my mountain laurels lost their blooms due to a hard freeze, but the plants themselves remained healthy and continued to thrive in the following seasons.
It is important to note that while mountain laurels can survive freezes, extreme and prolonged cold can still have detrimental effects on the plants. Severe freezes with temperatures well below 20 degrees Fahrenheit for an extended period can potentially damage or kill even the hardiest of plants. However, in most cases, mountain laurels are able to withstand typical winter freezes without significant harm.
To protect mountain laurels during cold snaps, it is recommended to provide some additional care. Covering the plants with a frost cloth or blanket can help provide insulation and protect them from the harshest cold. Additionally, applying a layer of mulch around the base of the shrubs can help insulate the roots and retain moisture, which can be beneficial during freezing temperatures.
Mountain laurels are hardy shrubs that can survive freezes, although their blooms may be eliminated by hard freezes below 20 degrees Fahrenheit. These native evergreen plants are resistant to cotton root rot fungus, which is deadly to many other Texas landscape plants. While extreme and prolonged cold can still have negative effects, mountain laurels are generally able to withstand typical winter freezes and continue to thrive in Texas landscapes.