Daylilies are perennials with the scientific name Hemerocallis. If you live in USDA plant hardiness zones 3 through 9, you should have no trouble growing beautiful daylilies. According to the University of Rhode Island, once daylilies bloom, they keep their bloom for up to 40 days. Caring for your daylilies while they are in bloom is essential to keep the flower healthy and vibrant for as long as possible.
Difficulty: Moderately Easy
Watch for your daylilies to begin blooming. This will occur between March and May. When you see the blooms, add 1 lb. of a 12-4-8 fertilizer for every 100 square feet of soil. This will give the daylilies extra nutrients to keep their blooms big and colorful.
Water your daylilies if they are not getting at least 1/2 inch to 2 inches of rain water each week. The University of Florida IFAS Extension recommends watering the daylilies at night when they are most likely to benefit from moist soil.
Spread mulch around the soil surrounding the daylilies. Pine needles or wood chips will do the job. The mulch will help the daylilies retain water during the spring and summer months while the plant is in bloom.
Fill an empty spray bottle with water and add 2 tbsp. of dish soap. Squirt your daylilies with this mixture once a week, getting underneath the blooming petals. This will keep away aphids and other small insects that tend to attack daylilies.
Plant your daylilies are in a location where they can receive full sun for at least six hours. Daylily blooms will be at their fullest if they receive half a day’s sunlight.
Nematodes can also cause damage to blooming daylilies. If nematodes are present in your soil, you may have to use using chemicals to get rid of them.