Rhubarb Flowering: What To Do When Rhubarb Bolts and Goes To Seed
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Your rhubarb has bolting and started flowering – learn what causes this and what to do about it.
It’s very early spring and you walk out to your rhubarb patch for the first time since last Fall and gasp: Your rhubarb has already bolted.
Usually when edible plants go to seed it’s the end of those plants, at least for that season. But when it happens to rhubarb there are three things you should know:
#1 Don’t panic. #2 Don’t throw in the towel on your rhubarb. #3 Everything’s going to be just fine.
In fact, discovering rhubarb seed pods and rhubarb flower stalks is perfectly normal.
Why is My Rhubarb Bolting?
There are a few reasons why your rhubarb plants may be bolting: Seed pods and flower stalks usually don’t grow on younger rhubarb plants but they are common on more mature plants that are at least 3 years old. Our rhubarb plants have been tended by one home owner after the other for the past 100 years! And we get several flower stalks per rhubarb plant. Dividing the crowns of mature plants every few years resets the maturity clock so to speak and reduces flowering.
Another factor that influences the growth of flower stalks is the variety of rhubarb. Some are more likely to flower than others. Old-fashioned varieties such as Victoria and MacDonald continuously produce seed pods whereas other varieties like Canada Red and Valentine are less likely to bolt. These and other modern varieties are bred to flower less often.
Heat can also cause rhubarb to bolt. Rhubarb does best in cool weather and if you’re having a particularly warm Spring it can cause the rhubarb to bolt. Be sure to give your rhubarb plant adequate water.
Other stressors can also cause rhubarb to bolt, such as insect or animal damage to the leaves or a lack of nutrients.
Still, even when all proper care and precautions are taken, it’s very natural for rhubarb plants to bolt.
What To Do When Rhubarb Bolts
Rhubarb flowers are pretty and it’s almost a shame to cut them down. Do you have to? No, they won’t actually harm the plant. Nor will they affect the flavor of the rhubarb.
But they will greatly limit your harvest.
The simple reason is that it takes a plant a lot of energy to produce flowers and seeds and that is energy is being diverted from producing the actual edible stalks. A rhubarb plant that is allowed to go to seed won’t yield as large of a harvest as it otherwise would have.
Ideally you really want to avoid letting your rhubarb plant even get to the point where there are flower stalks.
Initially these long shoots start off as a seed pod at the base of the plant. As soon as you notice these seed pods remove them.
To remove them use a sharp knife at cut them as close to the base of the plant as possible.
If they’re not removed the seeds pods will grow into a long stalk and flower at the top, diverting even more energy away from the production of edible stalks. Remove these flower stalks by cutting them with a sharp, clean knife as close to the base of the plant as possible. Flower stalks are harder to remove than regular stalks are by twisting and pulling so you’ll most likely need to use a knife to cut them.
I’ve heard the flower stalks are edible but remove and discard the flowers and leaves.
Aren’t those pretty?
Rhubarb flowers last a long time. Try putting them in a vase for a more exotic flower arrangement.
With your seed pods and flower stalks removed your rhubarb plant can now focus its energy and producing a delicious and healthy yield of edible rhubarb stalks. Continue checking your plant frequently for new seeds pods and promptly remove them.
Happy harvest!
Ready to eat some rhubarb? Check out these yummy recipes!
Strawberry Rhubarb Upside-Down Cake
Oat and Buckwheat Waffles with Rhubarb Compote and Vanilla Cream
Article originally published on The Daring Gourmet April 1, 2016
Hi, I’m Kimberly Killebrew and welcome to Daring Gourmet where you'll find delicious originals, revitalized classics, and simply downright good eats from around the world! Originally from Germany, later raised in England, world-traveled, and now living in the U.S., from my globally-influenced kitchen I invite you to tour the world through your taste buds!
Can you eat (cook) the tube like part of the rhubarb?
My grandfather always had a large number of rhubarb plants in his garden because he was a home wine maker and favoured rhubarb wine. When he passed on, all his plants were dug up by the landlord. I managed to rescue about 10 of them from the dumpster, along with 2 gooseberry bushes. Sadly only 4 survived in the long run, along with only 1 of the gooseberry bushes. I have no idea of the variety, and I have no use for rhubarb, so I actually allow them to run to flower for decorative purposes.
I read in a homesteader type magazine that the flowers themselves could be processed in a manner where they could be eaten. That really is what I am looking for since I’ve never had any trouble growing rhubarb. I was given a recipe for making a rhubarb drink also using raspberry or strawberry Jell-O. Nice.
I’ve wondered that myself but all sources I’ve read indicate that any part of the plant other than the stalks (which can include the stalks the flowers grow on) are poisonous. I haven’t come across anything any reliable sources that say otherwise. I’m curious though but don’t want to be the first to find out! :)
I have rhubarb plants in the ground. If I wanted to plant some in pots, on my deck, do they need to be brought in side for the winter? I live in Michigan, so it does get cold!! Also, what varieties have the best flavor? Thanks
This is the first time my Rhubarb plants have flowered! THEY ARE VERY Old and very hot today variety unknown Thanks for your advice
Someone asked about ways to preserve rhubarb. In my opinion rhubarb and ginger jam is a wonderful contribution to breakfast (with fresh ginger, not ground). Make too much and you’ll have presents for your friends.
Hello All,
I have just been reading all of your comments and found them interesting and informative. I originally planted a single plant which had been given to me by a friend when she had been thinning her own plants out 10 years ago, next to my compost bins. The single plant has now become about 8 to 10 with one this year managing to grow partly inside the compost bin – weird!! One plant this year started to grow what looked like a Triffid which I now see is the flower stalk. I have harvested 3 armfulls of stalks in the last week and given 2 lots away. We have just had a really hot snap here in Kent. I made rhubarb and strawberry crumble for the first time this year but my usual favourite is rhubarb and ginger. Just add a teaspoon of ginger to the crumble mix – yummy. Happy gardening :-)
Thanks for all the info. What type of feed to you give Rhubarb? I have some manure that I purchased when I first set my plants out, can I put some of this around the plant as food?
Hi, manure is a good choice as is compost. We keep a compost pile and that’s what we mostly use for our rhubarb and veggies.
Your information about the Rhubarb seed pods was extremely helpful! My plants are only in their second year of growth, but one of them has developed a seed pod and I didn’t know enough to recognize the early pod. Thank you again!
I’m so glad it was helpful, Vickie, thank you!
Thank you for the info! I had never seen my rhubarb go to seed before so all this information is very helpful!
I’m so glad it was helpful, Ellie, thank you!
I have been leaving the flower stems on my rhubarb for many years and have not regretted it. I have a variety that is very early and produces huge leaves and stems something like gunnera. I think it is called something like Champagne Early but not sure. There are always more than enough non-flowering stems that I can eat and I’ve had plenty more to make wine from. The flower stems appear very early on. After three of four appear the plant seems to be satisfied with that. It’s like it says “thank you for letting me flower”! It keeps on producing edible non-flowering stems for the rest of the season while the flowers ripen to produce seed. The seeds turn a beautiful rustic red colour and I have successfully grown rhubarb from the seed and given a plant to a neighbour. So I don’t mind the flowers at all. We get along fine together!
Very reassuring to hear that Chrisgg, kind of like how god intended it to be :)
How do you plant the seeds dried or pods
If you find out I’d like to know too lol
Loved your comment. It’s just as it should be.
Do you have to do anything special with the seed pods? (Dry them wait till fall to plant???)
I’d just like to know as long as the rubarb keep growing is it edible I need to make a bunch of pies and would rather use fresh then take from the freezer is it still ok to use
Absolutely, Tammy! It’s perfectly safe, but the texture tends to wane over the course of the summer. I usually continue watering my rhubarb throughout the summer so that it extends its growing season.
I live on the Central Coast north of Sydney and it is the middle of winter here.
My rhubarb plant has gone to seed for the first time and I have collected some of the seed to see if I can grow it.
After reading all the posts I will now cut the seed stalks off.
Not sure why it is seeding as it isn’t warm, although we did have a hot summer especially February.But that was months ago so not relevant I think.
Hello,
I have a slightly different rhubarb issue. I have some very tiny things Kant s that grew from seed. 2seedlings are in a smallish pot outside, and 2 more are planted directly in the ground. I’m wondering what your thoughts are on them surviving the summer and coming back in the spring. And, if there is anything special I should do to help them along. Thank you.
Hi Simone, I don’t have any experience growing rhubarb from seed, only from roots when I split the crowns. I split and planted several this past spring – some in pots, some in the ground – and they are growing like crazy. I can’t speak for the seeds, but rhubarb is generally a very hardy plant that will thrive even against the odds.
Why does burdock plants look so similar to rhubarb?
Hi Linda, yes they do, especially when the burdock is young. They’re not related but they are commonly confused with each other.
This was very helpful, I have a rhubarb that must be very old as it has been here since we moved in twenty years ago. I tried to dig it up as it was in a bad spot iand it kept on growing, I hacked it, have run over it with the lawn mower to no avail it has thrived its enourmous…I completely ignore it and gave away tons of it this year. I have a freezer full of it. Muffins, pies and cakes,compotes… sigh ..even after it bolts it keeps producing…its overtaken my small garden!
Maybe I should pay attention to it and see if the opposite happens!!