Are Rhubarb Leaves Really Toxic?
Updated: May 10, 2022
The answer is more complicated than you think.
Like most people in the Midwest, I really look forward to spring. After all, there’s a lot to love: warm temperatures, blooming plants and—my personal favorite—spring produce.
One of the most iconic spring fruits (well, rhubarb is a vegetable, but we use it like a fruit) is rhubarb. The pretty pink stalks are a delicious addition to pies, muffins, jams and other rhubarb recipes.
However, rhubarb has a little bit of a shady side. I was always warned to stay away from rhubarb leaves because they’re poisonous. But is the rumor true? Here’s what we found.
Did you know you should never eat these foods raw?
Is Rhubarb Poisonous?
The stalks of a rhubarb plant are safe to eat. You can even eat them raw—but be warned, they’re very tart!
However, the large, smooth, heart-shaped leaves are toxic. “Rhubarb leaves are considered poisonous to humans and animals due to high concentrations of oxalic acid,” says Dr. Barbara Ingham, a professor of food science at the University of Wisconsin. This oxalic acid can cause difficulty breathing, nausea and even kidney stones.
It’s safe to put rhubarb leaves in your home compost, though. Oxalic acid isn’t readily absorbed by the roots of plants, so compost containing decomposed rhubarb leaves can be safely worked into the soil of your garden, according to Iowa State University Extension and Outreach.
The Verdict
As scary as this process sounds, don’t panic. You would have to eat several pounds of rhubarb leaves to reach a toxic level—so don’t feel like you need to toss the whole batch if tiny leaf scraps end up in your rhubarb muffins. But do avoid eating the leaves whole—even a few can make you feel sick.
And, if you learn how to grow rhubarb in the garden, keep Fido away from the patch. Most pets are a lot smaller than humans, so it takes very few rhubarb leaves to do damage. Give your pup one of these dog-friendly foods instead.
Strawberry Rhubarb Dump Cake
It always seems like my rhubarb goes bad in a hurry, so I was looking for a simple way to combine two of my favorite flavors in an incredibly easy dessert. I added extra spices to enhance the flavor of this strawberry-rhubarb dump cake for a sweet treat my whole family loved! —Jessica Bridge, Grand Junction, Colorado
Strawberry Rhubarb Cheesecake Bars
These cheesecake bars layer a buttery pecan shortbread crust with a rich and creamy filling and sweet-tart strawberry rhubarb jam. For larger squares, cut into nine bars instead of 16. —Amanda Scarlati, Sandy, Utah
Pecan Strawberry Rhubarb Cobbler
Chock-full of berries and fresh-picked rhubarb, this pretty cobbler is the perfect finale for a dinner for two. Pecans in the topping and the delicious dessert sauce make it extra special. —Lily Julow, Lawrenceville, Georgia
Rhubarb Crumble
To tell you the truth, I'm not sure how well my strawberry rhubarb crumble keeps—we usually eat it all in a day! You can skip the apples and strawberries in the recipe, which I do sometimes. But they do make this quick, easy dessert extra good. —Linda Enslen, Schuler, Alberta
Nut-Topped Strawberry Rhubarb Muffins
A sweet, crispy topping highlights these tender muffins that are filled with two favorite spring foods, rhubarb and strawberries. They're perfect for a brunch or a grab-and-go breakfast. —Audrey Stallsmith, Hadley, Pennsylvania
Strawberry Rhubarb Cake with Orange
I came up with this strawberry rhubarb cake when I wanted to make something with rhubarb and strawberries that wasn't a pie. If you know someone who hasn't tried rhubarb before, this is a great way to introduce them to it. —Theresa Kreyche, Tustin, California
Berry Rhubarb Fool
A "fool" is a British dessert that's usually made with custard. This is a modified, quicker version I created. My kids love it because it doesn't taste like rhubarb—so I guess it's well named! —Cheryl Miller, Fort Collins, Colorado
Lemon Rhubarb Tube Cake
For a taste of summer, try this dessert. The cake's fresh lemon flavor and tart rhubarb topping are so refreshing. —Courtney Stultz, Weir, Kansas
Strawberry-Rhubarb Upside-Down Cake
I prepare this colorful dessert quite often in the late spring or summer when fresh rhubarb is abundant. I make this rhubarb cake with cake mix and take it to church potlucks. People actually line up for a piece. —Bonnie Krogman, Thompson Falls, Montana
Berry-Apple-Rhubarb Pie
I make this family favorite every year for a gathering at my sister's, where the recipe is known as "Uncle Mike's pie." I use only fresh berries, apples and rhubarb that I grow myself. —Michael Powers, New Baltimore, Virginia
Strawberry Rhubarb Cream
A friend gave me this recipe a long time ago. It’s rich and creamy yet refreshing. I make this often in early summer when rhubarb is readily available. —Norma DesRoches, Warwick, Rhode Island
Strawberry Rhubarb Coffee Cake
Although my coffee cake makes a large pan, it never lasts very long! It's great for a Sunday brunch after church and nice to bring to family reunions, too. —Dorothy Morehouse, Massena, New York
Strawberry Rhubarb Pie
While growing up on a farm, I often ate rhubarb, so it's natural for me to use it in a pie. I prefer to use lard for the flaky pie crust and thin, red rhubarb stalks for the filling. These two little secrets helped this strawberry rhubarb pie recipe win top honors at the 2013 Iowa State Fair. —Marianne Carlson, Jefferson, Iowa
Rhubarb Strawberry Crunch
Garden-fresh rhubarb is put to great use in this easy recipe. It's wonderful with ice cream. —Barbara Foss, Waukesha, Wisconsin
Strawberry-Rhubarb Cream Dessert
A neighbor shared this recipe with me, and I created my own variation using garden-fresh rhubarb and strawberries. The shortbread crust and creamy sweet-tart layers went over big at a family party—not a crumb was left! —Sara Zignego, Hartford, Wisconsin
Rhubarb Berry Coffee Cake
I rely on a cake mix to speed the prep for this moist streusel-topped dessert that pairs tart rhubarb with sweet strawberries. It's great all by itself, but feel free to add some frosting or ice cream. —Jackie Heyer, Cushing, Iowa
Slow-Cooker Rhubarb Strawberry Sauce
We recently started growing our own rhubarb, and we live in a part of Oregon where strawberries are plentiful. I created this to drizzle over ice cream and filled a crisp with the rest. —Kim Banick, Salem, Oregon
Winnie's Mini Rhubarb & Strawberry Pies
Every spring, we had strawberries and rhubarb on our farm outside Seattle. These fruity hand pies remind me of those times and of Grandma Winnie’s baking. —Shawn Carleton, San Diego, California
Strawberry-Rhubarb Ice Pops
These cool, creamy pops are a deliciously different way to use up the bounty from your rhubarb patch. —Donna Linihan, Moncton, New Brunswick
Rhubarb Berry Cheesecake Pie
My grandparents grew a ton of stuff in their garden, including rhubarb and strawberries. We typically baked it into pies and cobblers, but then Mom found this recipe and it became a fresh, new favorite. —LeeAnn McCue, Charlotte, North Carolina
Rhubarb and Strawberry Coffee Cake
Vanilla cake with cream cheese filling and strawberry rhubarb sauce make a grand finale for a Mother’s Day brunch. I made this to honor our moms and grandmothers. —Danielle Ulam, Hookstown, Pennsylvania
Slow-Cooked Strawberry Rhubarb Sauce
This tart and tangy fruit sauce is excellent over pound cake or ice cream. I have served this topping many times and have gotten rave reviews from friends and family. —Judith Wasman, Harkers Island, North Carolina
Strawberry/Rhubarb Crumb Pie
Everyone seems to have a rhubarb patch here in Maine. This pie won first prize at our church fair; I hope it's a winner at your house, too! —Paula Phillips, East Winthrop, Maine
Strawberry-Rhubarb Flip Cake
My friend Dave always brought two strawberry rhubarb cakes to work to celebrate his birthday. He’d use up rhubarb growing in the yard and treat his co-workers. —Charlene Schwartz, Maple Plain, Minnesota
Rhubarb Crisp
I found this strawberry rhubarb crisp recipe on a box of Quaker Oats about 20 years ago. It's quick and easier to make than pie. It's versatile, too, because you can add strawberries in spring or apples in fall. I usually pop it into the oven shortly before we sit down to eat so it's still warm for dessert! —C.E. Adams, Charlestown, New Hampshire
Rhubarb Fool with Strawberries
A fool is a classic British and Irish dessert that's usually made with whipped cream and cooked fruit. Try my quick version with rhubarb and berries. —Cheryl Miller, Fort Collins, Colorado
Rhubarb Icebox Dessert
A light and fluffy marshmallow layer tops the tart rhubarb filling in this delicious make-ahead recipe. —Renee Schwebach, Dumont, Minnesota
Rhubarb Berry Upside-Down Cake
I had leftover rhubarb and wanted to create something fresh. With blueberries, strawberries and dried cranberries on hand, I discovered I had a berry upside-down cake. —June Paul, Portage, Wisconsin
