RainLily Tips & Tricks. Partner your RainLilies with other low-water plants such as Amaryllis, Watsonia, Crocosmia, Kniphofia, and Scadoxus. Growingrainlilies is not difficult when the right conditions are available to the plant. Rainlily bulbs produce diminutive blossoms in abundance once they’re settled in the right spot. How to Get RainLilies to Bloom. Rainlilies rarely need help flowering when planted properly and grown in the proper conditions. They are usually inspired to bloom by rain. RainLily Flower. How To Propagate Lilies From Bulbs.RainLily in Pink Flowers on Wooden Table. How To Grow Zephyranthes. How to GrowRainLilies. Plant the small rainlily bulbs in well-draining soil during the fall season. Soil that is rich, holds moisture well, and is slightly acidic is preferable for this plant. How to GrowRainLilies. Buy. Rainlilies are usually found in Southwest nurseries starting in late spring. They are offered growing as grassy-looking clumps in one gallon pots. Rainlilies benefit from fertilizing at planting time and annually. In northern gardeners grow these non-hardy bulbs in containers as annuals or overwinter the pots in a cool dry location. Sowing – rainy season. How to growrainlily from seeds. Take a Growbag and fill it with Cocopeat. Sprinkle the seeds around the Growbag. In this video, I am growing yellow rainlilies from seeds. Tip: Do not dip the seeds in water else they will stick to your finger tips and it will become slightly tough for you to plant them in soil. Growing. Rainliliesgrow well in full sun or partial shade. They tolerate a variety of soil conditions, although they prefer well-drained soil. They are very drought tolerant once established. Rainliliesgrown in containers require more frequent watering; about two to three times a week depending on the size of the container. Rainlilies prefer sun to part sun and a light, fertile soil. They take little care.We growrainlilies from the genera Zephyranthes and Habranthus. The ideal conditions for a great rainlily flowering season is a dry period followed by rain. This summer, we’ve had that in spades.