You see them everywhere in American homes and offices – the lovely, lush Dieffenbachia. And with good reason: They work well inside, don’t have many pest problems, and they don’t need much light. In fact, they’ve been around since 1759 – so I’d say this is one plant with good staying power!
This ‘Amoena’ dumbcane has been cut back to its main trunk several times over the years, and each time it’s come back fuller and more beautiful.
Photo Credit: Gerald L. Klingaman
‘Triumph’ is a newer, quite colorful Dieffenbachia.
Photo Credit: Gerald L. Klingaman
Also known as dumbcanes, these indoor beauties are easy to grow: They just need a bit of light and some regular care. This includes keeping it out of direct sun (or the leaves will sunburn) and letting the soil dry out a bit between waterings (but don’t let it become bone-dry).
There are some great dumbcane selections to choose from. Try an old favorite like Dieffenbachia seguine ‘Amoena’. This cultivar makes quite a statement, reaching 6-8 feet tall! Its 18-inch-long leaves cluster at the ends of stout, segmented trunks that often grow 2 or more inches in diameter. The plant has cream-colored, finger-shaped blotches equally spaced down the length of the leaves and is representative of the older dumbcanes. Newer types like ‘Triumph’, ‘Tropic Star’ and ‘Honey Dew’ have creamy-white or yellow variegation patterns over much of the leaf, as well as more compact, free-branching growth habits.
But as easygoing and wonderful as dumbcane is, it’s very important to be aware of its dangers: Dieffenbachia is on every poisonous plant list published. In the 1990s, it was the second most common plant-related cause of poisoning reported to Poison Control centers (behind only to the philodendron).
Be sure to wear plastic gloves before ever cutting into the stem of a Dieffenbachia, because the sap can cause a severe toxic reaction! If dumbcane is ingested or sap on the fingers is rubbed near soft tissue around the eyes or nose, you’ll know immediately that you’ve got a problem: The plant’s calcium oxalate crystals and a protein called asparagine penetrate the cells and cause painful burning and inflammation of the tissue. Symptoms usually are intense, but short-lived. In severe cases, swelling, redness and pain can persist for up to 48 hours.
That said, if you’re careful with Dieffenbachia – and don’t have any little children or plant-munching pets at home – it’s a great addition to your indoor garden. The sunny variegation can really enliven your household, adding color and a lush, tropical feel with minimal care.
