Lilies are showstopping bulbous plants that are celebrated for their large star-like or trumpet-shaped blooms and heady fragrance. Whether grown in pots or borders, the enchanting perfume of a lily plant on a late summer evening is a sight to behold.
As a professional gardener, I have had the pleasure of growing lilies in various locations where I have worked, mostly in pots. Growing lilies in containers can add interest and variation to garden borders throughout the year, as they can be positioned within borders and beds like temporary installations to be removed once flowering is finished.
When caring for these striking plants, it is essential to learn how to deadhead lilies and how to fertilize them properly. Fertilizing lilies is crucial for their growth and blooming, and here, a garden expert shares all the information you need to give these summer bulbs a boost.
Two of the most common true lilies are Oriental lilies (Lilium oriental) and Asiatic lilies (Lilium asiatica), both known for their colorful and impactful blooms. Most lilies grow best in US hardiness zones 4 to 9 and are considered hungry plants, benefiting from regular applications of fertilizer throughout the growing season.
According to Sam Niemann, a garden expert and founder of Grown by Design, a boutique landscape design firm based in San Diego, lilies should be fertilized consistently from spring through fall. It is crucial to feed lilies regularly and stick to a schedule to ensure the best results. This applies to lilies in both borders and pots, as all plants will benefit from a good dose of feed.
When planting lily bulbs, it is recommended to use good quality organic potting soil to give the bulbs the best start early in the year. From spring onwards, lilies can be fed every two weeks with a liquid fertilizer, following the instructions on the packaging. In early to mid-spring, a general-purpose fertilizer with equal nitrogen, phosphorous, and potassium values is ideal.
During the summer, it is best to switch to a fertilizer high in phosphorus and potassium to support flower production and bulb preparation for winter dormancy. Stop fertilizing lilies towards the end of summer and allow the foliage to soak up as much sun as possible before cutting back and storing the bulbs for winter.
In mild regions like US hardiness zone 9, lily bulbs can be left in the ground over fall and winter. Applying a thick layer of bark mulch in November can help feed and protect the lilies through the winter months. Knowing how to fertilize lilies and providing regular feeding will ensure that your plants return next year, blooming once again.
In conclusion, lilies are stunning plants that can bring beauty and fragrance to any garden. By understanding how to properly fertilize and care for lilies, you can enjoy their vibrant blooms year after year. Whether grown in pots or borders, lilies are sure to add a touch of elegance to your outdoor space.