North America Non-native Plant

Arum

Botanical name: Arum

USDA symbol: ARUM2

Life cycle: perennial

Habit: forb

Native status: Non-native, reproduces and persists in the wild in the lower 48 states  

Arum: The Mysterious Shade Garden Drama Queen If you’re looking to add some serious botanical intrigue to your shade garden, arum might just catch your eye. This perennial plant brings an almost otherworldly presence to gardens with its distinctive arrow-shaped leaves and dramatic hooded flowers. But before you fall head ...

Arum: The Mysterious Shade Garden Drama Queen

If you’re looking to add some serious botanical intrigue to your shade garden, arum might just catch your eye. This perennial plant brings an almost otherworldly presence to gardens with its distinctive arrow-shaped leaves and dramatic hooded flowers. But before you fall head over heels for this mysterious beauty, there are a few things every gardener should know.

What Exactly Is Arum?

Arum is a perennial plant that’s made quite a name for itself in certain parts of the United States, despite not being a native species. Originally hailing from the Mediterranean region and parts of Europe and western Asia, this plant has established itself as a naturalized resident in several states across America.

The plant is perhaps best known for its striking architectural form – those glossy, arrow-shaped leaves that seem to emerge from nowhere, followed by the distinctive hooded flowers that look like they belong in a fairy tale rather than your backyard.

Where You’ll Find Arum Growing

As a non-native species that reproduces spontaneously in the wild, arum has established populations in California, Illinois, Missouri, North Carolina, Oregon, Virginia, and Washington. It’s one of those plants that, once introduced, tends to make itself at home and persist without much human intervention.

The Garden Appeal: Why Gardeners Are Drawn to Arum

There’s something undeniably captivating about arum’s dramatic presence in the garden. Here’s what makes it appealing:

  • Bold, architectural foliage that creates striking visual interest
  • Unique hooded flowers (called spathes) that are conversation starters
  • Ability to thrive in shady spots where many other plants struggle
  • Low-maintenance once established
  • Interesting seasonal progression from emergence to dormancy

Garden Design: Where Arum Fits In

Arum works beautifully as an accent plant in shade gardens and woodland settings. Its bold foliage provides excellent contrast against finer-textured plants, and it can serve as a dramatic focal point in Mediterranean-style gardens or naturalized woodland areas. The plant’s architectural quality makes it perfect for creating that designer garden look without too much fuss.

Growing Conditions: What Arum Needs to Thrive

Arum is surprisingly adaptable, but it does have some preferences:

  • Light: Partial to full shade – this isn’t a sun lover
  • Soil: Moist but well-draining soil rich in organic matter
  • Hardiness: Generally suitable for USDA zones 6-9
  • Moisture: Consistent moisture during growing season, can tolerate some drought when dormant

Planting and Care Tips

Growing arum successfully is easier than you might think:

  • Plant tubers in fall, about 3-4 inches deep
  • Add plenty of compost or well-rotted organic matter to the planting area
  • Mulch around plants for winter protection in colder zones
  • Allow foliage to die back naturally – the plant needs this time to store energy
  • Divide clumps every few years if they become overcrowded

A Word About Wildlife and Pollinators

While arum has its charms, it’s worth noting that as a non-native species, it doesn’t provide the same ecological benefits as native plants. The flowers are specialized for fly pollination rather than supporting our native bees and butterflies.

Should You Grow Arum? The Bottom Line

Arum can certainly add drama and interest to the right garden setting. It’s particularly valuable for challenging shady spots and can create stunning visual impact with minimal care. However, as conscious gardeners, it’s worth considering native alternatives that provide similar aesthetic appeal while supporting local ecosystems.

If you do choose to grow arum, be mindful that it can naturalize readily. While this isn’t necessarily problematic, it’s something to keep in mind for long-term garden planning.

For those seeking native alternatives with similar dramatic flair, consider exploring native woodland plants like wild ginger, mayapple, or native ferns that can provide architectural interest while supporting local wildlife.

Whether you choose arum or go with native alternatives, the key is creating a garden that brings you joy while being mindful of the broader ecological picture. After all, the best garden is one that makes both you and your local environment happy!

Arum

Classification

Group

Monocot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Liliopsida - Monocotyledons

Subclass

Arecidae

Order

Arales

Family

Araceae Juss. - Arum family

Genus

Arum L. - arum

Species

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