Daylilies are hardy plants that can grow well in a wide range of climates. However, they are best suited for zones 3-8, where they thrive and bloom the most. In zones 1-2 and 9-10, daylilies can still grow, but they may not perform as well as they do in their ideal zones. By choosing the right foliage type for your zone, you can help ensure that your daylilies thrive and bloom to their full potential.

If you live in zones 3-7, it is recommended that you choose dormant or semi-evergreen daylily cultivars, as they are better adapted to colder climates and can survive harsh winter conditions. On the other hand, if you live in zones 8-10, evergreen and some semi-evergreen daylily cultivars are better suited to your climate, as they can tolerate hotter and more humid summers.

  • Dormant: Best suited for hardiness zones 3-7
  • Semi-Evergreen: Best suited for hardiness zones 5-8
  • Evergreen: Best suited for hardiness zones 7-10

In colder climate zones daylilies will benefit from additional care during the winter months. Without proper protection, daylilies can suffer from frost damage, root rot, and other winter-related problems that can stunt their growth or even kill the plant. It is crucial to take steps to protect daylilies during the winter season. Our farm is located in Maine, zone 4b. By following these steps we have successfully grown dormant, semi-evergreen, and even evergreen. Don’t be intimidated to try different foliage types. If you follow these steps, you can grow nearly any type.

  • STEP 1 – Cut Back the Foliage
    Before the first frost, cut back the foliage of the daylilies to about 3 inches above the ground. This will prevent any diseases or pests from overwintering in the plant and also make it easier to cover the plants.

  • STEP 2 – Fertilize in the Fall
    After cutting back the foliage, apply a slow-release fertilizer around the base of the plant to promote root growth and help the plant store nutrients for the winter. Lightly apply a balanced fertilizer like Milorganite.

  • STEP 3 – Mulch the Soil
    Once the fertilizer has been applied, apply a layer of mulch around the base of the plant to protect the roots from the cold temperatures. A layer of 2-3 inches of mulch will suffice. Be careful not to cover the daylily completely.

  • STEP 4 – Cover the Plants
    Cover the daylilies with a layer of straw, leaves, or evergreen boughs to protect them from the harsh winds and cold temperatures. Cover the plants loosely, so that air can still circulate around them.

  • STEP 5 – Remove Covers
    In early spring, once the temperatures begin to warm up, and the risk of frost has passed, gradually remove the covers from the daylilies.

Browse Daylilies by Foliage Type

  • Semi-Evergreen Foliage

  • Evergreen Foliage

  • Dormant Foliage

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