Casey is an avid gardener and homesteader with years of experience managing Mother Nature.
I shouldn't have touched the periwinkles
As I write this article my eyes are swollen, I'm covered in an itchy rash all over my body, and I've been miserable for two weeks. All I can think is how much I hate those damn Periwinkles and regret my gardening efforts which resulted in me messing with a plant I should have never touched.
Curse you Periwinkles!
Mother nature is amazing. Nature contains absolutely beautiful things that can kill you. You could walk out into a forest, touch or eat the wrong plant, and that plant could make you sick without you realizing it.
Did you know that some types of Periwinkles are poisonous? I sure didn't.
There are different types of Periwinkles. The type I came into contact was a species called Vinca Minor. This species is a vine type plant with purple flowers which are poisonous to dogs, cats, horses, and humans if they are eaten. It you try to pull the vine to clear a garden bed and get the plants juices all over you (like me) you can get a poison ivy type rash.
Two types of Similar Looking Periwinkles: Vinca Major and Vinca Minor.
Vinca Major: The two plants look alike but Vinca Major has larger flowers and leaves. Vinca Major isn't poisonous. Interestingly it is used in chemotherapy and can help treat cancer. Its also used by some as a treatment for high blood pressure and to assist in controlling bleeding. source
"Vinca major is a close relative of oleander but is far less harmful. Eating vinca plants can cause systemic toxicity varying from mild abdominal cramping to serious cardiac (heart) complications." quote from source
Vinca Minor: This species is poisonous. It looks almost exactly like Vinca Major except the flowers and leaves are smaller. Also nicknamed the "Flower of Death," when large consumed in high quantities can kill people and pets. It can also cause humans to break out in a rash involving bumps that are red and itch. The rash is hard to cure with poison ivy treatments and a doctors visit is probably needed for more persistent cases. source
A Great Ground Cover But Dangerous
Up until this point I actually really loved our Vinca Minor vines. They cover like 70% of our mountain with pretty purple flowers. They are an aggressive vine and smother out the weeds which is nice. The areas of our property covered in this plant don't have grass to mow and the vines stay flat against the ground. Vine plants are extremely useful in controlling certain sections of the yard.
Having a severe allergic reaction to my Periwinkles
That being said, I now know I have to be cautious with the Vinca. I had a garden bed filled with it and decided to clear it for my asparagus patch. Thing is, ever since we moved in our house two years ago, my husband and I kept getting rashes outside. They were small and we both figured it was poison ivy (even though we never saw any). I've walked though the Periwinkles countless times not knowing the name or anything about the vines I was stepping on.
It was a comment by a friend of mine about a photo of my purple flowers and vines where he identified the plant's name. After a little research, come to find out, I've been getting poisoned by them over and over. Periwinkle rash is different than Poison Ivy. The rash is red, has bumps, and looks similar to Poison Ivy but it WON'T GO AWAY. One patch of rash stuck around on one finger for four months. I didn't know at the time it was Periwinkle rash and thought it was Poison Ivy. No Poison Ivy treatment worked on it (corticosteroid cream, oatmeal baths, aloe, etc.)
When I cleared the Vinca from my garden box, that was the first time I'd really messed with the plants with my hands. I'd seen blogs say that using shears was the best tool for removal of periwinkle vines (no mention that they could cause rashes). I used garden shears to cut the roots and rolled the vines up to remove them from the box. I wore gloves and I took a shower immediately after but that didn't protect me. I started breaking out in a rash later that night. By the next day the rash was all over my arms. I figured it was done....NOPE. Every day for four days it spread to a new body part. I got it on my chest, all the way down my left leg, on my fingers, on my face, and on my eyelids. My eyes were swollen so badly my vision was blurry and my whole body itched and itched.
Periwinkle Allergic Reaction: My Leg
For me steroids are the only cure
I don't take many pills but it was me breaking down and trying Benadryl that halted the spread. It didn't stop the itch or the rash and even though I tried countless home remedies nothing worked. After also dealing with a bad case of tendinitis in my hand, I went to the doctor who gave me a steroid shot to treat both conditions and some steroid pills for the rash. I could tell later that day before taking any pills that the steroid shot was working. The itching was less severe and the red rash wasn't as bright. The shot alone healed the rash within a few days but the steroid pills did come in handy for a few other occasions when I managed to get Periwinkle rashes again. When 70% of your yard is covered in this plant like mine it's damn near impossible to stay away from it.
It stinks having such a large portion of my yard toxic to me. My husband has also had reactions to the periwinkle vines but not as severe as me. We've also had a few visitors get long-term rashes from coming into contact with it. Such a beautiful plant but very, very toxic.
We've slowly resorted to poisoning some of the sections of Periwinkle closest to our house. I can get a rash just standing near it and even though I hate poison, it's the only choice for us since we can't touch it. There is still a ton of yard covered in it but at least I can go outside in the yard safely and can enjoy mother nature without having Periwinkles too close by.
Photo credit: all photos are my own.
Benadryl Helps Stop The Spread and Itching
This content is accurate and true to the best of the author’s knowledge and is not meant to substitute for formal and individualized advice from a qualified professional.
Casey White (author) on October 14, 2020:
I don't think all varieties are poisonous. Just some select few. You can buy the nice kinds at places like Lowes. I think whoever owned my house at one time planted the wrong kind and it's an invasive vine so it took over.
Tammy Winters from Oregon on October 13, 2020:
yikes... I didn't know that Periwinkle can be poisonous. I wonder if what I have is actually Periwinkle.
Casey White (author) on August 22, 2020:
Thank you for commenting and sharing your experience! I know that's why I wrote this article. I couldn't find very much info on rashes from vinca and wanted to help others. My husband, relatives who have visited us, and yard workers have all gotten a rash from it so I definitely know its the vinca that's the source. My worst case of it was when it was on my eyelids and I had hives all over my face. Not a fun plant to encounter.
Kristina on August 21, 2020:
I experienced this after trying to remove our vinca minor. Mine lingered for 12 days before I went to the dr.I am surprised that yours is the only source I have found to link them with rashes. I got spreading hives as well.
Casey White (author) on June 12, 2020:
Vinca minor have small flowers while major look exactly the same but are bigger. I'd assume if it was at a garden center it's the safe kind. My garden center also sells different vincas that are safe in a wide variety of colors. If you've touched your plants and didn't get a rash I'd say you are safe. My plants if I even lightly brush up against them I get a rash.
Imogen French from Southwest England on June 12, 2020:
You have me wondering if the periwinkles I have in my garden are major or minor. I'll have to check ... I had no idea they could cause such a bad reaction. I think mine are probably Vinca major, as I bought them from the garden centre, and I've not had any rashes that I can recall. Thanks for sharing your story - it's something people should be aware of.