Oleander: Look but do not touch
We’ve seen them everywhere: The white, pink and magenta flowers appear where little else is in bloom. These tough-as-nails plants thrive along our freeways up and down the state.
Oleanders, the perfect shrub for our hot summer climate.
Perfect? In many respects yes. Hardy, durable, cut-’em-to-the-ground-and-spring-back tough, they’ve earned a place in our landscape and hearts.
For a quick and beautiful hedge or screen, there is no parallel.
But, they are perfectly toxic.
When you next consider planting this shrub, heed the fact that it is packed with poisonous compounds.
Oleanders, members of the Apocynaceae (Dogbane family), are laced with bitter sap that contains Cardenolide Glycosides, which act upon the heart much like foxglove or Digitalis.
These toxic compounds have also been used from antiquity for various medical treatments. While studies and opinions differ on dosage, if enough oleander is consumed, it can prove fatal, especially to young children, small pets and livestock.
All plant parts of oleander, fresh or dry, are toxic if ingested. There are many recorded cases of oleander poisoning in this country every year. This may be of importance to people who have pets who tend to chew on plants, for play areas young children will frequent, or for situations that have plantings of oleander growing within nibble-reach of livestock.
In campground areas where coleander grow, care must be taken when choosing ’skewers’ for roasting. While the long, thin, sturdy stems seem perfect for the job, they can prove a disastrous error of choice.
Care should be used when pruning oleander. Gloves and long sleeves are adequate protection. Skin irritation can occur from contact with the sap, and safety eyewear is a must when working with the plant to avoid accidental splashing of the acrid sap into your eyes.
Oleander is very difficult to eradicate once it is large and established. Consider how large these tall shrubs will get at maturity. Oleander can be pruned severely without harm to the plant, but over-planting or planting too close to sensitive areas leaves the problem of frequent disposal of the trimmings. Burning any part of oleander creates toxic smoke, so care must be taken to minimize contact with the fumes if you decide to burn it.
Oleander is a beautiful and important summer-hardy shrub with many different applications in your yard, so it doesn’t need to be avoided when designing your landscape. After all, plenty of other toxic plants are commonly used in our yards.
Understanding the limitations and dangers of any plant should help you design your landscape appropriately, and help you keep it safe.

Mitsy Krzywicki (pronounced Kriz wik’ ki), a former Record Searchlight artist, now enjoys life as an avid gardener, freelance graphics artist and amateur photographer. You can drop her a line at czygyny@yahoo.com
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Thank you Mitsy. I lost a childhood rabbit friend to the oleanders planted along the fence in our backyard.
I had to cut down three clumps of overgrown oleander when I bought my house. They were probably 15-feet tall, spindly and ugly as sin. I cut them back right to the ground, it took 5 full sized pick up truck loads to haul the trimmings away. I am trying to snuff out the plants, by covering them in black plastic, and then placing full bags of small decorative bark (still in the bag) for a couple of years - I hope that the roots will die and rot away during this time. It’s been just over a year, and it seems to be working. Oleanders have their place, and I belive it’s next to the freeway!
I recently read an article which says (I cannot quote it exactly) that the oleander is dying out in California due to some disease, so you may not see them even in parkway plantings before long. I have them in my yard and enjoy their beauty. Sorry I don’t recall which publication I read it in nor the exact cause of their ailment but the article was definite about their soon demise.
cdillon—It is sad that such a popular plant is so dangerous to pets!
Jonnien—the oleander is under attack by the ‘Glassy Wing Sharpshooter’, a small insect that is introducing a bacterial infection that is eventually fatal.
Brandon—The only way I was able to kill big oleander stumps was to burn them with small, very hot fires. Careful tending and hot burning reduces the toxic smoke. I built the fires much like a barbecue fire would be.
Oh! Interesting! I had never thought of BBQ ing the root clumps away…. hmmmm, now where did I put the lighter fluid……
B