Delphinium Flowers: Beautiful But Poisonous

β€œWhat is that tall blue flower? I can see it from my kitchen window.” My neighbor was intrigued by the bursts of growth and color in my ever-expanding garden.

β€œDelphinium,” I said. β€œIt was here when we moved in. Stunning, isn’t it?”

β€œIt certainly is.”

I thought it was more purple than blue. But the tall spikes covered in tiny mounds of flowers were a conversation piece. I had never grown delphiniums before. Discovering a large plant already firmly established in front of what I call my writing window (I sit at an old spinet desk at this very window every day to write) was a bonus.

delphiniums in full bloom
Emily-Jane Hills-Orford / Insteading

Sadly, the flowers were short-lived. And being tall with a heavy abundance at the top of each stalk, all it took was one heavy rain to knock it over and send the flowers sprawling all over the grass. I enjoyed it while I could, and after my first summer, I sunk a tall rose climber into the ground to support the top-heavy stalks and protect them from heavy rain.

Part of a genus of over 300 species (Ranunculaceae), my specific delphinium is actually a cultivar, cultivated as an ornamental plant. And that it definitely is! It certainly lives up to its symbolic associations. All plants have symbolic associations and delphinium is symbolically big-hearted and fun. I know mine is.

Mostly found in the northern hemisphere and in some of the high mountains of tropical Africa, delphinium is also known by its common name of larkspur. It’s important to note that all the members of the delphinium family are toxic to both humans and livestock.

multi colored delphinium
T.Kiya / Flickr (Creative Commons)

The plant is tall, gracious and laden with many flowers, each sporting usually five petal-like sepals surrounding a hollow pocket with a spur at the end (perhaps the source of its common name, larkspur). The stalk or the raceme (which is sometimes as tall as 2 meters) is unbranched and full of flowers, from almost halfway up the stalk to its tip. The leaves fan out from the raceme, each deeply lobed with three to seven toothed projections. At a distance, the leaves almost bear a resemblance to the shape and size of a maple tree leaf.

I always watch with anticipation from late June until the full heat of summer brings along the burst of blooms. A great pollinator plant, delphiniums attract hummingbirds, butterflies, and bees, and I get to watch the entire show from beyond my writing window. In spite of its high level of toxicity, delphinium is food to various larvae like the dot moth.

delphiniums and other flowers
Herry Lawford / Flickr (Creative Commons)

This toxic plant is dangerous, especially the younger parts of the plant. If consumed by humans, it will cause severe digestive issues, and if touched, it can cause severe skin irritation. All parts of the plant contain poisonous chemicals, including various diterpenoid alkaloids like methyllycaconitine. Even the seeds are toxic with a 1.4% content of alkaloids.

With its cardiotoxic and neuromuscular blocking effects, consumption of any part of this plant can cause death within hours. This is a big concern for ranchers in the western rangelands of the United States. The wild varieties of delphinium (larkspur) are the root cause of cattle poisonings causing death. Consequently, ranchers often delay moving their cattle to the higher elevations until later in the summer when larkspur is considerably less toxic.

Delphinium is not totally useless. Other than a good pollinator, the juice of the flowers when mixed with alum creates a blue ink. And some people do consider this plant an herb, and they use the stalks and roots to make a poultice for skin ailments, inflammation, wounds, and snake bite. The root, when made into a powder, is believed to control pain. Some also claim the plant is useful to create treatments for acid reflux, anorexia, and asthma.

Personally, knowing its high level of toxicity, I would be wary of any medicinal uses for this plant. The ornamental beauty is so short-lived, I like to think of delphinium as my garden treasure: Something to be enjoyed in full bloom and a plant that attracts all kinds of multi-colored and fascinating pollinators.

Delphinium is an ornamental plant. One that benefits the pollinators. With the concern over the declining population of pollinators like honeybees, that in itself gives this beautiful summer plant a purpose other than looking “pretty”’. Tall and gracious, it makes a perfect backdrop to other ornamental plants like roses, lilies, and geraniums.

Written by Emily-Jane Hills Orford

Emily-Jane Hills Orford is an award-winning author of several books, including Gerlinda (CFA 2016) which received an Honorable Mention in the 2016 Readers’ Favorite Book Awards, To Be a Duke (CFA 2014) which was named Finalist and Silver Medalist in the 2015 Next Generation Indie Book Awards and received an Honorable Mention in the 2015 Readers’ Favorite Book Awards. She writes about the extra-ordinary in life and her books, short stories, and articles are receiving considerable attention. For more information on the author, check out her website at:


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