Managing Daylily Rust and Aphid Infestations

Daylily Rust: A Serious Fungal Disease

Daylily rust is a fungal infection that causes orange-brown pustules on leaves, weakening plants and reducing vigor. It spreads easily, so infected plants should not be shared or divided for replanting until the disease is fully controlled.

Treatment and Prevention

Follow Cornell University's guidelines for managing daylily rust, which include removing infected foliage, applying fungicides, and improving air circulation. Avoid planting hostas in the same bed, as they may also be susceptible.

Dealing with Aphids

The tiny white bugs at the base of your daylilies are likely aphids. Use horticultural soap or neem oil to control them, and monitor regularly. The American Hemerocallis Society provides a helpful pest identification guide.

Replanting After Daylilies

You can safely plant other perennials (except hostas) in the same spot after removing infected daylilies. Pansies are a good choice for fall color.

Bottom Line: Don't give away rust-infected daylilies. Treat the disease aggressively, control aphids, and choose resistant plants for future plantings.