A Comprehensive Guide on How to Prepare Coreopsis for Winter

Coreopsis flowers, also known as tickseed, may have a name that suggests otherwise, but they are actually bright and dainty blooms that can bring cheerfulness to any garden. These flowers are so beloved in Florida that the state designated all Coreopsis species as the state wildflower. Whether you’re in Florida or anywhere in the eastern United States, growing coreopsis can be a rewarding experience.

If you’re looking to overwinter your perennial coreopsis, there are certain preparations you need to make to ensure your plants survive the cold winter months. In this guide, we’ll cover everything you need to know to successfully prepare your coreopsis for winter.

What You’ll Learn

Table of Contents

Should I Cut Back Coreopsis in the Fall?
Avoid Compost and Fertilizer
Apply a Layer of Mulch
Water Until the First Freeze

Should I Cut Back Coreopsis in the Fall?

For many perennial plants, cutting them back in the fall can help them rebound with vigor in the following spring. However, when it comes to coreopsis, cutting them back too much can actually be detrimental. It’s best to leave the stems and foliage intact to act as insulation and protect the crown from the cold.

In the fall, the foliage of coreopsis turns a pleasing mahogany color before drying out. Leaving the foliage on the plant not only adds texture to your landscape but also helps protect the plant during the winter months. Once the danger of frost has passed in the spring, you can cut back the dead stems to encourage new growth.

If you prefer a tidy garden throughout the winter, you can cut your coreopsis down to about four to six inches above the ground. This will provide some insulation for the crown while maintaining a neat appearance. Just be careful not to cut back too much, as this can leave the plant vulnerable to winter weather.

Avoid Compost and Fertilizer

Unlike many plants that benefit from a layer of compost in the fall, coreopsis actually thrives in average soil that is not rich in nutrients. The plant prefers well-draining soil and does not require additional fertilizer. In fact, fertilizing in the fall can encourage new growth that may be damaged by frost.

If you do choose to fertilize, it’s best to do so in the spring. Avoid adding compost or fertilizer to the soil in the fall to ensure the best chances of overwintering your coreopsis successfully.

Apply a Layer of Mulch

While coreopsis may not need compost or fertilizer, it does benefit from a layer of organic mulch to provide insulation and warmth during the winter months. Adding a three- to four-inch layer of organic mulch around the base of the plant can help protect the roots and provide a slow release of nutrients as the mulch breaks down.

If you live in an area with long, cold winters, consider adding an extra two to three inches of mulch to further insulate the roots. Additionally, if you have cut back your plants, you can apply leaves or straw over the top of the plant for added protection.

Remember to remove this extra layer of mulch in the spring once the danger of frost has passed to allow for new growth.

Water Until the First Freeze

While coreopsis doesn’t like to have wet feet, it does require regular watering, especially until the first hard freeze. Even after the plants stop blooming in the fall, it’s essential to keep the soil moist to help the roots survive the winter.

If there is a lack of rainfall in the fall, be sure to water the plants deeply at least once a week. Check the soil moisture by poking your finger into the soil, and if it’s dry about an inch down, it’s time to water your coreopsis.

By following these simple steps, you can ensure that your coreopsis plants survive the winter and come back strong in the spring with their vibrant blooms.

Conclusion

Preparing your coreopsis for winter doesn’t have to be a daunting task. With a little extra care and attention in the fall, you can help your plants survive the cold months and thrive in the coming spring. By avoiding excessive pruning, refraining from adding compost or fertilizer, applying a layer of mulch, and ensuring proper watering, you can enjoy the beauty of coreopsis year after year in your garden.

Have you successfully overwintered coreopsis in your garden? Share your tips and experiences in the comments below. And for more tips on winterizing your garden plants, check out our related guides: