Rhubarb Hibiscus Jam

April 26, 2018(updated on August 30, 2021)

As I type, my living room windows are wide open to let in the light and air of spring (street noise and city dirt come along for the ride, but they’re a price I’m willing to pay at the moment). After what felt like an interminable winter, it’s such a relief to shuck off all the heavy, warming things for both clothes and foods that are crisper and lighter.

For me, the appearance of rhubarb is one of the most welcome signals that easier days are on the horizon. I spotted some while in Ireland earlier this month and kept my fingers tightly crossed that some would be waiting for me when I got home. And it was!

Earlier this week, I scooped up two and a half pounds at my local produce market. As he rang up my total, the clerk asked me if I was going to be making a pie. When I told him it was destined for jam, he seemed a little disappointed (perhaps he was going to ask for a slice?).

Once home, I cleaned the rhubarb, cut away the sad ends, and cut it all into half inch-wide slices. It filled my largest measuring cup, which felt just right in terms of the batch size I wanted.

In years passed, I would often combine rhubarb with a fresh vanilla bean, but because vanilla is so scarce and expensive these days, I reached for my jar of dried hibiscus flowers, instead. I had a feeling they would compliment the tartness of the rhubarb and would help enhance its ruby glow.

I combined most of the rhubarb with two cups of sugar and 1/4 cup of the hibiscus flowers (they went into my biggest tea ball, but cheesecloth would also work) and let it all macerate overnight.

I held about 1/2 cup of the rhubarb back from the pot, to stir in at the end. Rhubarb collapses as it cooks and I wanted the finished jam to have some texture. By holding some back to stir in at the very end, you end up with a bit more elemental rhubarbness in the jam.

I did use a bit of Pomona’s Pectin to help bolster the set and help corral the runny juices. However, if you’re someone who prefers a softer set jam, you could leave it out.

No ratings yet

Rhubarb Hibiscus Jam


  • 2 1/2 pounds rhubarb
  • 2 cups + 2 tablespoons granulated sugar
  • 1/4 cup dried hibiscus flowers
  • 2 teaspoons calcium water from the Pomona's Pectin system
  • 2 teaspoons Pomona's Pectin powder


  • Wash the rhubarb and cut away any bad spots. Cut it into slices that are about 1/2 inch in width. Measure out 1/2 cup of the sliced rhubarb and set it aside.
  • Take the rest of the rhubarb and place it into a pot. Add 2 cups of sugar and stir to combine. Tuck the hibiscus into a tea ball or a length of cheesecloth and nestle it into the rhubarb. Let it macerate for at least three hours and up to 24 (I did mine overnight).
  • When you're ready to cook, prepare a boiling water bath canner and four half pint jars.
  • Place the pot with the rhubarb on the stove over high heat, add the calcium water, and bring to a boil.
  • Cook, stirring regularly for 10 to 15 minutes, until the rhubarb starts to break down. If it's spitting, reduce the heat. Whisk the pectin powder into the remaining 2 tablespoons of sugar. Add this pectin-spiked sugar to the cooking jam in three stages, stirring well after each addition.
  • Finally, stir in the reserved rhubarb. Cook for an addition 1 to 2 minutes.
  • Remove the pot from the heat and fish out the hibiscus bundle or tea ball.
  • Funnel the finished jam into the prepared jars, leaving 1/2 inch headspace.
  • Wipe the rims, apply the lids and rings, and process in a boiling water bath canner for 10 minutes.
  • When the time is up, remove the jars and set them on a folded kitchen towel to cool. When the jars have cooled enough that you can comfortably handle them, check the seals. Sealed jars can be stored at room temperature for up to a year. Any unsealed jars should be refrigerated and used promptly.

Sharing is caring!

Leave a comment & rate this recipe

If you enjoy this recipe, please do give it a star rating when you post a comment. Star ratings help people discover my recipes. Thank you!

Your email address will not be published. Required fields are marked *

Recipe Rating

9 thoughts on "Rhubarb Hibiscus Jam"