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The Macabre Tomato, Bed of Nails Plant – Solanum quitoense

October 19, 2024

It seems like yesterday it was Memorial Day, and all of the summer residents to Maine were just rolling into town, and we were rolling out our summer annuals. When I look back at photographs taken early in the season, its amazing to see just how small all of these plants were in May. As the temperatures warmed, our plants grew. Some plants grew more than others and these are the ones we are noting to use again in different ways for next year’s displays.

Close-up of a green leaf from the Bed of Nails Plant, showcasing prominent purple veins and sharp thorns along them. The surface texture is visible against a blurred background, emphasizing the plant's striking thorns.
Solanum quitoense, or naranjilla, is a member of the nightshade family and a native of Ecuador. The unusual leaves have thorns along the veins. This plant is growing in the Mary Livingston Ripley Garden at the Smithsonian on the Mall. Image by Victoria Pickering.

Growing Bed of Nails Plant – Solanum quitoense in the Edible garden

Bed of Nails plant was one of the show-stoppers of our summer display. We had an exhibition of Lunaform pots at CMBG all summer long. In our Burpee Kitchen Garden, there were 4 matching pots that our kitchen gardener filled to the brim with plants. The centerpiece of the arrangement was Solanum quitoense or “bed of nails plant.”

The common name for this tomato relative comes from the nearly inch-long, purple spikes emanating from the plant’s leaves, stems, and main stalk. Another common name is naranjilla, although this is primarily associated with the non-spiky plant’s fruit rather than its leaves.

A native of Peru, Ecuador, Colombia, and Venezuela, it can grow up to 8 feet tall in cultivation, although in our short summer of Maine, we will be lucky if ours reaches 3-4 feet in height by the end of the summer. It is an annual so we can propagate ours through cuttings or by saving the seeds from the fleshy, bright orange fruit.

A Bed of Nails Plant with large green leaves and clusters of round, orange fruit. The stems and leaves bear small, visible spines. In the background, other foliage and purple flowers add charm, perfect for gardening enthusiasts passionate about plant care.
Lulo fruit hangs from the branches of beds of nails plants (Solanum quitoense). Also known as naranjilla, this feisty plant (an annual in North American gardens) is closely related to common tomatoes, and this golden fruit of the Andes is popular in Columbia and other South American countries where it is native. The fruits are juicy and full of seeds (and the source of Naranjilla juice). Image by Michelle Gervais of finegardening.com.

An individual leaf on these plants can be over a foot in length and 10″ or more in width. They are fuzzy, light green with a purple tinge, and the aforementioned imposing purple spikes. People who have never seen these plants before cannot believe that such a macabre plant really exists. I remember when I saw one for the first time 15 years ago at Swarthmore College. I did a double take and then, of course, immediately wanted one.

I would suggest that you grow this annual out of the reach of children. The spikes not only look sharp, they are sharp! Grow Solanum quitoense in rich, well-drained soil in part-shade to full sun. The warmer your climate, the more shade I would give this plant in the middle of the summer.

-Rodney

Close-up of several velvet-covered, orange round fruits of Solanum quitoense growing on a plant. These fruits have a fuzzy texture and are attached to a green stem with leaves in the background.
Lulo fuits, naranjilla or Solanum quitoense fruit, a member of the nightshade family with a citrus-like fruit, outside the Museum of the American Indian. Image by Victoria Pickering.

More Wacky edibles and interesting plants to experiment with

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  1. Kerry says:

    Thanks for the info! I saw this plant in Swarthmore, PA this summer in Andrew Bunting’s garden and had no idea what it was. I fell in love with it, even after I got stabbed. It’s a killer plant–in all ways.

  2. Ellen Sousa says:

    Yikes! This is a new one to me. Looks as though it could be very effectively used as a security device to keep people out of your gardens! 🙂

  3. Kathryn says:

    Interesting! How on earth do you not go through an entire box of Band-Aids when planting, propagating, or pruning this plant?

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