If you want to master growing the spider lily, you are in the perfect place. The spider lily is an absolutely show-stopping addition to any summer garden. Its slender, dramatic petals arch outward just like delicate spider legs. It also produces an intoxicating, vanilla-like fragrance. The Tropical Spider Lily (Hymenocallis speciosa) is surprisingly easy to grow. You just need to understand its tropical origins.
Many beginner gardeners confuse it with the Red Spider Lily (Lycoris radiata). This often leads to fatal mistakes during the cold winter months. Here is my complete, contractor-approved guide covering everything about growing the spider lily successfully.
The Basics of Growing the Spider Lily
Planting and Growing the Spider Lily Bulbs
Timing is absolutely everything when it comes to tropical bulbs. The true secret to growing the spider lily is waiting until late spring or early summer. The danger of frost must completely pass. The garden soil needs time to warm up properly.
- Soil Preparation: Spider lilies love rich organic matter. Mix a generous amount of compost into your planting bed. The soil must be rich but drain very quickly. The delicate bulbs will rot quickly in standing water.
- Planting Depth: Plant the bulbs with the pointy “neck” sitting slightly above the soil line. Planting them too deep is a huge mistake. It is the number one reason they refuse to bloom.
- Spacing: Space the bulbs 6 to 8 inches apart. This allows plenty of room for the broad, strap-like leaves to fan out naturally.
Watering and Feeding When Growing the Spider Lily
Spider lilies need consistent moisture during their active summer growing season. They originate in very humid, wet environments. Aim for a deep watering at least once a week. Always check the top inch of the soil first. If it still feels wet, wait a few more days.
You need to feed the plants to encourage massive, fragrant white blooms. Use a balanced, slow-release bulb fertilizer. A standard 5-10-5 organic blend works perfectly when growing the spider lily. Apply it every four to six weeks once the green shoots appear. Stop fertilizing completely by late summer.
Protecting Your Spider Lily from Pests
The thick, fleshy leaves of the spider lily are highly resistant to most diseases. However, they can act as a magnet for hungry garden pests. Aphids, spider mites, and slugs love them during the rainy season.
Regularly inspect the dark undersides of the leaves. Treat the foliage immediately if you spot aphids or active mite webbing. Use a high-quality organic insecticidal soap. Spray the plants in the early evening to avoid burning the leaves in the sun.
Winter Care for Spider Lily Bulbs
You can safely leave your spider lilies in the ground year-round if you live in USDA Zones 9, 10, or 11. A light layer of winter mulch protects them perfectly through mild winters.
However, winter frost will completely kill the bulbs if you live in Zone 8 or colder. You must treat them exactly like Dahlias or Cannas. Wait for the foliage to yellow naturally in the fall. Cut the dead leaves back. Carefully dig up the bulbs and gently brush off the dirt. Store them indoors in a cool, dry, dark place until next spring. A simple cardboard box filled with dry peat moss works best.
Frequently Asked Questions
Why is my spider lily not blooming?
The most common reason a spider lily refuses to bloom is improper planting depth. The top “neck” of the bulb must sit slightly above the soil line. They also require plenty of direct sunlight to produce flowers.
Do spider lilies come back every year?
Yes, they are perennial bulbs. In warm climates (Zones 9-11), they will naturally return and multiply every year. In colder climates, they will only survive if you dig them up and store them indoors for the winter.
Can I grow spider lilies in pots?
Absolutely. Spider lilies thrive in large, well-draining containers. Potted bulbs are also much easier to move indoors when the harsh winter frost arrives.
