From our roots to our blooms, water is our lifeblood. We lilies are not a single, monolithic species; we are a diverse family including Orientals, Asiatics, Trumpets, and daylilies (Hemerocallis), each with slightly different preferences. However, our core need is consistent: we desire consistently moist, well-drained soil. This means our roots seek a environment that is never parched and never drowning. Soggy, waterlogged soil suffocates our bulbs, leading to rot and a swift demise. Conversely, soil that is too dry stresses us, causing our leaves to yellow, our buds to drop before opening, and our growth to become stunted. Our goal is a deep, established root system, which is only possible with even and appropriate moisture.
As the soil warms and our green shoots break through the surface, our thirst begins. This initial growth phase is critical. We require a steady supply of water to fuel the rapid development of our stems and leaves. Water us deeply once or twice a week, depending on your local rainfall. The goal is to moisten the soil to a depth of at least 6 inches, encouraging our roots to grow downward, making us more resilient. A light, daily sprinkling is counterproductive as it only wets the surface and teaches our roots to stay shallow, making us vulnerable to summer heat.
This is our moment of glory, but also a period of high stress. The combination of blooming and higher temperatures significantly increases our water demand. Consistent moisture is absolutely paramount now. We will likely need deep watering 2-3 times per week. Please check the soil about 2 inches down; if it feels dry, it is time to water. The best time to give us a drink is in the early morning. This allows water to soak deep into the root zone before the sun evaporates it, and it ensures our foliage is dry by evening, helping to prevent fungal diseases like powdery mildew that thrive on damp leaves overnight.
As our spectacular flowers fade and our foliage begins to yellow and die back, our water needs diminish. We are beginning to store energy in our bulbs for the winter dormancy ahead. While you should never let the soil become dust-dry, you can significantly reduce the frequency of watering. The cooler temperatures and increased autumn rains often provide enough moisture. Continue to water only if the season is unusually dry, as our bulbs still need some hydration to remain healthy while dormant. Cease watering entirely once the ground has frozen solid.
During winter, we are asleep beneath the soil. Our bulbs are alive but inactive, and we require no additional water from you. In fact, water on frozen ground or on dormant bulbs in cold, wet soil is one of the greatest threats to our survival, as it inevitably leads to rot. The mulch you (hopefully) applied in late fall serves to regulate soil temperature and conserve existing soil moisture, which is all we need until we sense the spring thaw.
