Plan the perfect garden with our interactive tool →

How to Control Daylilies

Daylilies (Hemerocallis fulva) are one of the most common bulb plants in America. These showy flowers are easy to grow, extremely hardy and make terrific cut flowers, as they can last a long time in a vase. Some of the over 40,000 cultivators also have a wonderful fragrance. Daylililes, however, are not true bulb plants. They have extremely thick tubers which send up new sprouts. They also reproduce by seed, but it's the tubers that cause rapid spreading. The tubers tend to grow into each other, forming large, hard clumps of root masses that can be almost impossible to separate.

  • Daylilies (Hemerocallis fulva) are one of the most common bulb plants in America.
  • These showy flowers are easy to grow, extremely hardy and make terrific cut flowers, as they can last a long time in a vase.

Choose locations that make it difficult for daylilies to spread. These hardy flowers will grow just about anywhere, but if they get full sun and well-drained soil they will spread more rapidly than you would believe. Instead, plant them in a shady location, such as under a tree where the tubers will have to compete with thick tree roots.

Separate them frequently. Use a shovel to dig up the tubers every 2 years in the fall and break them apart with your hands or with the shovel. Make sure there is a sprout on each section of tuber. Then, replant them as new plants or give them away. Separating them frequently will ensure that they do not grow together.

  • Choose locations that make it difficult for daylilies to spread.
  • Instead, plant them in a shady location, such as under a tree where the tubers will have to compete with thick tree roots.

Place a border around your daylilies. There are many flexible borders you can buy that are made to sink into the ground and surround the plant, thus preventing the horizontal spread of the tubers. Most are marketed to contain bamboo plants. Dig a trench about 6 inches around your flowers, and insert the border, overlapping the ends. Fill it in with soil. Note that the daylilies will continue to spread within the bordered area, however.

Tip

If you are already dealing with a large clump of intertwined daylilies, the best thing to do is to dig up the entire clump and get rid of them rather than trying to separate them.

Warning

Even small fragments of a tuber can sprout new daylilies, so make sure you remove the entire root system if you do not want any more lilies to grow in that location.

Related Articles

How to Thin Iris Bulbs
How to Thin Iris Bulbs
How to Grow Peony Tubers
How to Grow Peony Tubers
How to Plant Cannons
How to Plant Cannons
How to Plant Canna Lilies in Florida
How to Plant Canna Lilies in Florida
How to Transplant Dahlias
How to Transplant Dahlias
How to Repot Aloe Vera Plants
How to Repot Aloe Vera Plants
Plants With Funnel-Shaped Flowers
Plants With Funnel-Shaped Flowers
How to Divide Cannas
How to Divide Cannas
How to Care for a Cannis Flower
How to Care for a Cannis Flower
How to Propagate Crinum Lily
How to Propagate Crinum Lily
Is Agapanthus the Same Family As Allium?
Is Agapanthus the Same Family As Allium?
Planting Iris Bulbs in Spring
Planting Iris Bulbs in Spring
How Do I Winterize Canna Lily Bulbs?
How Do I Winterize Canna Lily Bulbs?
Flower Bulb Identification
Flower Bulb Identification
Garden Guides
×