Bane or Cure: The World of Poison Gardens

You’re stumbling through a jungle, dehydrated and bone-weary, when you come across curious white flowers. You wonder whether they might alleviate the slash that you received from a thorny vine or just make it worse. Many poisonous flowers, from black henbane to monkshood, have figured as deadly poisons in folklore. At low doses, some have yielded cures, but at a high enough level, bane and cure becomes indistinguishable

It may seem paradoxical that plants, emblems of life, can kill, but early villagers learned the hard way not to snack on foreign plants they encountered on their foraging quests. Many of the most notorious poison flowers have storied pasts. Black henbane was theorized as the go-to weapon for Viking berserkers, who used it to descend into manic states of rage and insanity.

Real-world poison gardens were incredibly suspicious, though they were masked under the guise of "scientific study" or "medicine." The most famous modern equivalent is the Alnwick Poison Garden in England, where the plants are strictly accessed only under supervision – people have fainted just from inhaling the toxic fumes while walking by. 

Historically, these gardens housed plants that are legendary for their lethality:

• Belladonna (Deadly Nightshade): Used by ancient Roman assassins. A few berries were enough to ensure that death and destruction knocked at the target’s door. Venetian women used to put drops of it in their eyes to dilate their pupils for beauty (hence bella donna or "beautiful lady"), ignoring the fact that it was slowly blinding them. 

• Monkshood (Aconite/Wolfsbane): Historically used to poison the tips of arrows and bullets. It causes instant, horrific paralysis of the heart and respiratory system.

• Hemlock: The state poison of ancient Greece, famously used to execute the philosopher Socrates.

Were the gardeners up to no good?

Conjuring images of quaint shops filled with vials and bundles of herbs, run by doctors, herbalists, and holy men, apothecaries may seem charming. However, the reality is far grimmer. In the ancient and medieval worlds, the people tending these plants were almost always viewed with massive suspicion. On the surface, they operated in a gray area between apothecaries, alchemists, and professional poisoners, but the line between bane and cure is razor-thin. 

1. The Royal Poisoners

It was in the cutthroat environment of Renaissance Italy that many modern thrillers take their inspiration from. Power was concentrated in the Council of Ten, the secretive governing body that maintained order through surveillance and espionage, effectively forming a shadow government that ruled for nearly five hundred years. Political intrigue abounded – court gardeners and alchemists were frequently hired by wealthy families (like the notorious Borgias and Medicis) to cultivate specific plants for political assassinations. If a rival nobleman suddenly died of a mysterious "stomach ailment" after a banquet, it was usually no coincidence. 

2. The Witch Trials

For everyday peasants, the local herbalists or village wise women who grew these plants were heavily targeted during the witch trials. Plants like Belladonna, Henbane, and Datura are tropane alkaloids that cause intense visual and auditory hallucinations. Herbalists would mix these toxic plants into fat-based salves (known as "flying ointments"). When rubbed into the skin, it gave the user a sensation of flying or leaving their body, which the church interpreted as flying on a broomstick to a satanic sabbat.

3. The Professional Hitwomen

Known for being a woman’s weapon, poisons often fell within the purview of women. In 17th-century Italy, a woman named Giulia Tofana ran an incredibly successful underground cosmetics business. She used arsenic and belladonna derived from toxic plants to create a tasteless, odorless poison called Aqua Tofana. She sold it to women of lowly stature who felt that the only solution was to murder their abusive husbands. Intended to be administered in small doses, Aqua Tofana mimicked the symptoms of slow, progressive illnesses. Her operation was so discrete that she successfully helped assassinate over 600 men before she was caught.

Creating Your Own Poison Garden

You may already have poisonous flowers in the garden without knowing: Brugmansia (angel’s trumpet), deadly oleander, and the beautiful foxglove. Those without children or nagging pets who either have a flair for the macabre or respect for historical knowledge can set their sights on creating a poison garden. This is not a friendly garden; locate your plot in a secluded corner of the landscape, well away from casual paths. Keep your area fenced off from the rest of the garden using raised garden beds, which emulate the geometric format of medieval apothecary gardens. 

When choosing your plants, embrace the witch’s garden aesthetic by showcasing old-world specimens steeped in dark history. Angel’s trumpet is easy to grow, proliferating in full sun. Fill in the rest of your garden with an abundance of herbs and flowering plants. To honor medieval tradition, obelisk trellises are recommended for their rustic effect. Be sure to label each plant as toxic lest you forget.