The Arum Affair

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My new-found friends at the Native Plant Society might not approve, but I’m still falling in love with this beautiful Italian Arum.   After six days under the snow, with temperatures falling near zero at night, it still looks this fresh and crisp as the snow melts around it!

Arum leaves hold their vibrant green throughout the winter, as though unaffected by the ice and freezing cold.  The beautiful geometric patterns traced on their leaves in softest cream remain elegant from autumn through to early summer.  They remind me a little of a cold hardy Alocasia.

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Arum growing with our daffodils last February

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Native to Southern Europe and North Africa, Arum originated in a much warmer climate.  But it has a superpower: Arum italicum is thermogenic, capable of producing heat from its leaves and from its unusual flower.  The mitochondria in each cell produce excess heat, which gives the plant some protection from the cold.

A member of the Araceae family, it also has calcium oxalate crystals in its leaves.  These crystals are very irritating to skin and soft tissue… like the tender mouths of hungry deer.   All parts of the Arum are poisonous, including the corm from which it grows; which is the other reason I love these beautiful foliage plants.

Deer, squirrels, voles and rabbits won’t touch them.

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Columbine emerges through a winter ground cover of Arum italicum last March.

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These are a useful ground cover species in our woodland garden.  They grow best in shade and though drought tolerant, grow more prolifically in moist and fertile soil.

While I am thrilled to see these beautiful plants spread through our garden by seed and division, their prolific growth and nearly indestructible nature make them problematic in other regions of the United States.  Areas like the Pacific Northwest consider them invasive and ask home gardeners not to plant them.

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But Arum remain my cold-weather guilty pleasure.  I ordered over 200 of them this fall from Brent and Becky Heath, sharing a little more than half with my gardening friends.

I’ve planted them in beds and pots, beneath shrubs and amongst spring bulbs.  Interplant them with Hosta to keep a beautiful foliage presence in your Hosta beds year round.  Pair them with either hardy or deciduous ferns for delicious spring time associations.

I use them in parts of the garden where we grow Caladiums in the summer.  As we lift the Caladiums in fall, the Arum emerge from their summer dormant period.  Arum die back in early summer as the Caladiums fill in.

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Exotic as they may be, Arum still fill a niche in a North American woodland garden.  They hold and protect the ground against erosion.  They produce both nectar and pollen for pollinators each spring.  Birds eat their seeds in mid-summer.  And, their beautiful leaves make this gardener very happy. 

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Brent and Becky Heath’s display gardens in Gloucester, VA,  feature many blooming shrubs, including this lovely Camellia. The Heath’s call Arum italicum a ‘shoes and socks’ plant because it works so well as a ground cover beneath shrubs.

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I’m still wavering up and down the native plant/exotic imported plant continuum.  I’m hanging out more these days with the native plant enthusiasts and reading the literature.  I understand the nativist point of view, and yet I still believe that there is space in our garden for a population of exotic ‘come here’ plants, too.

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How would I garden without our Camellias and Rhododendrons, Alocasias, Narcissus, Caladiums and Mediterranean herbs?

Basically, if it will grow here and not end up as breakfast for a deer, I’m willing to entertain most any plant for at least a season or two.  And when it makes me happy, I just might explore a more lasting relationship.  Which perhaps explains the Arum affair….

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Arum italicum blooming in our garden last April

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Woodland Gnome 2018

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About woodlandgnome

Lifelong teacher and gardener.

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