North America Non-native Plant

Swamplily

Botanical name: Crinum

USDA symbol: CRINU

Life cycle: perennial

Habit: forb

Native status: It's either native or not native in the lower 48 states âš˜ It's either native or not native in Pacific Basin excluding Hawaii âš˜ Non-native, reproduces and persists in the wild in Puerto Rico âš˜ Non-native, reproduces and persists in the wild in the U.S. Virgin Islands  

Swamplily: A Bold and Fragrant Addition to Water Gardens If you’re looking for a plant that makes a statement with both size and fragrance, swamplily (Crinum) might just be your new garden favorite. This perennial herb produces show-stopping, lily-like blooms that can perfume an entire garden corner with their sweet ...

Swamplily: A Bold and Fragrant Addition to Water Gardens

If you’re looking for a plant that makes a statement with both size and fragrance, swamplily (Crinum) might just be your new garden favorite. This perennial herb produces show-stopping, lily-like blooms that can perfume an entire garden corner with their sweet scent. But before you rush to plant one, let’s dive into what makes this plant tick and whether it’s right for your landscape.

What Exactly Is Swamplily?

Swamplily belongs to the genus Crinum and grows as what botanists call a forb – basically a non-woody plant that comes back year after year. Think of it as the garden equivalent of a gentle giant: it produces large, strap-shaped leaves and impressive flower stalks that emerge from a bulbous base, creating a tropical look that’s hard to ignore.

Where Does Swamplily Call Home?

The native status of Crinum is a bit complicated. While it’s considered non-native in Puerto Rico and the U.S. Virgin Islands (where it has naturalized), its status in the mainland United States is less clear. You’ll find various Crinum species growing in Alabama, Arkansas, Florida, Georgia, Louisiana, Mississippi, North Carolina, South Carolina, and Texas, as well as in some Pacific territories.

Why Gardeners Love (and Sometimes Question) Swamplily

Here’s what makes swamplily appealing:

  • Stunning, fragrant flowers that bloom in white or pink
  • Bold, architectural foliage that adds tropical flair
  • Attracts butterflies and night-flying moths
  • Thrives in consistently moist conditions where other plants struggle
  • Low maintenance once established

However, there are some considerations. Given the unclear native status in many areas, you might want to research native alternatives like native lilies or wetland plants that provide similar benefits while supporting local ecosystems.

Perfect Spots for Swamplily

Swamplily shines brightest in:

  • Bog gardens and rain gardens
  • Edges of ponds or water features
  • Consistently moist borders
  • Subtropical and tropical-style landscapes
  • Areas where you want a dramatic focal point

Growing Swamplily Successfully

If you decide swamplily is right for your garden, here’s how to keep it happy:

Location and Soil: Choose a spot with full sun to partial shade and soil that stays consistently moist. Swamplily doesn’t mind wet feet – in fact, it prefers them. Rich, organic soil will give you the best results.

Hardiness: Most Crinum species thrive in USDA zones 8-11, though this can vary. Check your specific variety’s cold tolerance before planting.

Planting: Plant bulbs in spring after the last frost, with the neck of the bulb at or slightly above soil level. Space them about 3-4 feet apart – these plants need room to spread.

Care and Maintenance: Keep the soil consistently moist throughout the growing season. Apply a balanced fertilizer in spring, and don’t be afraid to water during dry spells. Deadhead spent flowers to encourage more blooms, but leave the foliage until it naturally dies back.

Wildlife and Pollinator Benefits

Swamplily flowers are particularly attractive to butterflies during the day and moths at night, thanks to their sweet fragrance. The nectar-rich blooms provide food for these pollinators, making your garden a more wildlife-friendly space.

The Bottom Line

Swamplily can be a stunning addition to the right garden, especially if you have consistently moist conditions and want something with tropical flair. However, given the uncertain native status in many areas, consider researching native alternatives that might provide similar aesthetic and ecological benefits. If you do choose swamplily, buy from reputable sources and enjoy those magnificent, fragrant blooms that make such a memorable impression.

Remember, the best garden plants are ones that thrive in your specific conditions while supporting local wildlife – so choose wisely and garden responsibly!

Swamplily

Classification

Group

Monocot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Liliopsida - Monocotyledons

Subclass

Liliidae

Order

Liliales

Family

Liliaceae Juss. - Lily family

Genus

Crinum L. - swamplily

Species

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA