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We’re on a canning spree this week. The air is crisp and the mornings are cool. We’re surrounded by a fiery array of leaves that rustle in the warm afternoon breeze. Fall is in the air and canning just feels right this time of year.
I could eat this plum jam by the spoonful; paired with a hot mug of tea (I’m totally day dreaming here)… Our tiny plum tree overproduces the most amazing little plums every year. I wish I could name this variety; anyone recognize these little beauties?
This recipe is really a cross between plum jam and plum preserves. It still has some of it’s preserve-like plum chunks, but it’s nice and thick and spreads beautifully. It’s awesome paired with breakfast pancakes or crepes. Oh and this would make the sweetest Christmas gift!
Home Canning Tools:
- 8 pint-sized jars with lids. I purchased them at Walmart.
- Large Stock Pot (20Qt+) with Rack (or purchase a canner)
- Jar lifter to safely transfer the jars
How to Make Plum Jam:
Cooking the Preserves:
1. Cut 12 lbs of plums in half, pit them and place in a large mixing bowl. Drizzle well with 4 1/2 cups sugar. Using a large spoon, stir plums with sugar until all are coated. If your plums are overripe or already very sweet, you may only need 4 cups of sugar total. You can add more sugar to taste while its cooking. Let plums sit at room temp with the sugar for about 1 hour, or until sugar is somewhat dissolved.
2. Transfer plums/sugar mixture in to a large cooking pot. Place it on the stove uncovered and bring to a boil, stirring occasionally. Make sure if you see a light boil to stir because the whole pot may not be boiling, just the center. If it stops boiling after you stir it, continue boiling until everything is uniformly bubbling, then simmer for 10 minutes and turn off the heat. Let the pot stand uncovered until it is just warm to the touch or reaches room temp.
3. As soon as it cools, repeat step 2 the same way – simmering 10 minutes. You will bring it to a simmer a total of 4 times, stirring to prevent scorching the bottom. This is why it takes 2 days to make. It’s really easy though and so worthwhile! There’s no “set” waiting time between boilings. If 2 days doesn’t work for you, by all means, take 3 days. Preserves have plenty of sugar so they won’t spoil at room temp if you leave it on the counter overnight. If you want the preserves to have an even thicker consistency, you can boil it 5-6 times if you wish.
(Note: the fourth time you boil, bring it to a boil over a little lower heat and stir a few extra times to prevent scorching. Also, it thickens more as it cools. If using a different type of plum, I suggest adding sugar to taste in case they are more tart)
4. The last time you bring it to a boil you will want to transfer it to sterilized jars while it’s boiling hot.
To sterilize the jars:
1. Start by washing your jars and lids with warm water and soap then let them dry in the oven at 215 for about 20 min or until completely dry. Boil the lids 5 min.
2. Transfer your boiling hot jam to the jars using a glass measuring cup and a funnel (least messy method) leaving about 1/2″ space.
3. Screw the lids on enough to keep a tight seal in place but don’t over-tighten them since air bubbles need to be able to escape.
Current Canning Guidelines:
Get up to date on the most recent canning guidelines here. It’s a great resource to answer frequently asked canning questions. Current guidelines recommend the following process (instead of oven canning):
- Place packed cans into the canning pot and cover with 1-2 inches of water. Bring to a boil and process 15 minutes.
- Remove from the pot and leave at room temperature undisturbed for 12-24 hours. You may hear a pop when the jars fully seal.
- After 24 hours, check that the seal has formed by pushing down on the center of the lid – it should not move at all. If the seal does not form, refrigerate jam and enjoy within 3 months.
Now don’t you want to curl up with a jar of that?
Plum Jam Recipe (No Peel, No Pectin!)

Ingredients
- 12 lbs sweet ripe plums, rinsed
- 4 1/2 cups granulated sugar
- 8 pint-sized jars with lids.
Instructions
- Place pitted and halved plums into the mixing bowl & drizzle with 4 1/2 cups of sugar. Stir plums until all coated with sugar. Let them sit for 1 hour then transfer the mixture into a large cooking pot.
- Bring it to a boil uncovered, stirring occasionally. Boil until the mixture is bubbling uniformly. Simmer for 10 minutes then turn off the heat. Cool to room temperature.
- Repeat step 2 a total of FOUR times. Last time bringing it to a boil at the lower temperature, stirring frequently to prevent scorching.
To Sterilize Your Jars:
- Start by washing your jars and lids with warm water and soap then let them dry in the oven at 215 for about 20 min or until completely dry. Boil the lids 5 min.
Filling and processing your jam:
- Transfer your boiling hot jam to the jars using a glass measuring cup and a funnel (least messy method) leaving about 1/2″ space.
- Screw the lids on enough to keep a tight seal in place but don't over-tighten them since air bubbles need to be able to escape.
- Place packed cans into the canning pot and cover with 1-2 inches of water. Bring to a boil and process 15 minutes. Remove from the pot and leave at room temperature undisturbed for 12-24 hours. You may hear a pop when the jars fully seal. After 24 hours, check that the seal has formed by pushing down on the center of the lid - it should not move at all. If the seal does not form, refrigerate jam and enjoy within 3 months.
Nutrition Per Serving
Recipe updated in 2019 to reflect new canning standards. Previously we used the oven method: screw the lids on enough to keep a tight seal in place but don’t over-tighten them since air bubbles need to be able to escape and place in the oven at 350˚F for 15 min then carefully remove from oven, flip upside down and let cool to room temperature.
Signs of Spoiled Canned Food:
With any type of canning, we follow this advice: “When in doubt, throw it out”
Discard and do not eat or taste any canned food if you notice any of the following:
- the jar is leaking, bulging, or swollen
- the jar looks damaged, cracked, or abnormal
- the jar spurts foam or liquid upon opening
- the canned food is discolored, moldy, mushy, slimy, or smells bad
Just picked our plums yesterday…again. I think its the last of them. My husband and I have decided to make plum jam. Your recipe looks soooo easy, we’ve chosen it. One questions first: In between each boil, do we wait for the jam to cool to ‘room tempeture’ through and through? Do we stir it during the cooling process?
It can still be warm and not fully to room temp. You might stir it soon after you turn it off to make sure it doesn’t scorch to the bottom but you don’t have to keep stirring while it cools. Hope that helps! 🙂
IT is sooooooo sour! I spent all day pitting plums I hat to throw it away.
Its day #2 now. I used 12 lbs of plums and 5 cups of sugar and one cup of agave nectar now and it is sooo tart. any suggestions?
You must have had some very tart plums! Did you try them before you put them in? Were they sour? It’s best to use ripe plums when making Jam. I don’t know what else to tell you besides adding more sugar if you used plums that are tart…
I would guess that you are using softer/juicier Santa Rosa or Beauty plums. They are more pink than the plums pictured here. I typically use 8 cups plums to 5.5 cups sugar with my Santa Rosas and that’s still on the tart side because I like to taste the fruit flavor rather than sugar. With jam you should always taste it as you go to check the sweetness, and you can always empty your jars back into the pan, add more sugar and boil it again before resealing with new lids in clear/sterilized jars.
Great tips! Thanks for sharing Janet 🙂
I think it has everything to do with the skins. Unfortunately I have the same problem. The flesh of the plums I used was very sweet, but the skins were a tad bitter, which really comes out in this process. I’ve added a LOT of sugar, and I think this is just going to be a wash. It’s more like a sweet-tart cranberry sauce, though I hesitate to say tart; it really is more bitter.
I’m curious; what kind of plums were you using?
Hi!! Just made this…literally finished 2 minutes ago. is there a waiting period for eating. Some jam recipes say 30days etc…..thanks!!!
No, you can enjoy it right away. Go ahead and put your spoon in it. 😉 Let me know what you thought of it!
THANK YOU!!
We just picked tons of plums from parents’ tree and I’m so excited to try this recipe. I was wondering how long will the jam last sealed and how long will it last after its been open?
I’m so glad to have found your blog! God bless you!!
There’s a lot of sugar to keep it preserved even after its opened. I’d say a couple weeks in the fridge 🙂
Thanks for your quick response! So 2 weeks after its opened. How about if its still sealed? What’s the shelf life of an unopen jar?
We’ve had them for a year in the pantry and they are still great. I haven’t tested them beyond that 🙂
Great for cooking with kids, save the seeds, clean, wash, dry and germinate in brown bag in the refrigerator. Two months later, plant baby plum trees for gifts with jam by the holidays!
The name of the plum tree is Santa Rosa Plum, they are very common in California. I was just gifted about 30 lbs of plums yesterday. Jam making will commence in a couple of days when they are fully ripe.
Thank you! Unfortunately our plums aren’t very abundant this year. All of our fruit trees locally are suffering. Must have been a late frost. Next year!!! 🙂
Will try your recipe. Get many Santa Rosa plums and want to can them this year. Since you do not put them into a waterbath after filling the jars, how long may I store them? Many thanks!
I’ve kept them on the shelf almost a year and they are still great! 🙂
Wonderful thank you — a bit stuck with what to do with our newly purchased orchard and it’s abundance of delicious fruit! Looks like your plums are Early Wilson Plums. YUMMO!
Thank you for letting me know Nadia, I always wondered what kind they are 🙂
Thank you!
Hi, Natasha, do you have recipe for the apple jam (povidlo)?
I don’t but I will ask my mom. She may. 🙂
I love your method of canning, I make jam all the time but have never done it the waterbath way, I usually just pour the hot am in sterilized jars and they self seal, I am making some concord grape jam today and will use your upside down method. I love it!
Mmm concord grape jelly sounds so so good!
They do not really self-seal, you need to boil them to melt the sealant thoroughly.The jars are not sterile any more by the time you fill them and wipe the rims. Don’t take chances with your family’s health. It is worth the extra ten minutes of your time to keep them safe.
Natasha, I just love you’re writing skills! I just got carried away with your opisaniye oseni. So beautiful! I love your site and use it a lot. May God richly bless you and your precious family and use you for His glory.
Thank you Tatiana 🙂 It is all about Him. Thank you for the reminder. God bless you and your family as well!
Jam sounds wonderful Natasha, but you need to correct the spelling of “plums” throughout your recipe. “Plumb” is a term used in construction; like “a wall is plumb.”
Oh goodness, I didn’t realize I had done that! Thank you so much for pointing that out! 🙂
What a wonderful homemade recipe!!!
Thank you Lisa 🙂
Thats so funny, I started boiling plums this morning to make jam
and I thought to myself, I wonder if natasha has a recipe different from the one I have and voila! Thats the first thing I see on the website 🙂 Thank you for sharing!
You’re welcome. That is a funny coincidence! 🙂
Natasha, do you think I can do the same with pears? and make pear jam? or do you have a pear jam recipe? we just have like 20 pounds of pears that I am not sure what to do with..
oh thats a good question. I’ve never actually canned pears before and my mom’s pears didn’t grow as well this year so we didn’t really experiment. Let me know if you find a good recipe.
Inessa – We used to get loads of pears from our neighbor who grew them commercially. We canned and dried them, and made pear butter. Pear butter is made just the same as you would apple butter. To make canned pears, just peel them, keep in lemon juice until all are peeled and cored, put in jars, add any juice to the jars, cover with water and waterbath for 20 minutes (this is at 5400 ft altitude -adjust accordingly to your altitude). To dry the pears we quartered them length-wise, peeled, cored, rinsed in a lemon juice/water rinse to keep from browning too much, then dried in a food dehydrator. They are a wonderful snack.
Inessa, I realize that this is way after the fact, but you might want to know this for the future. Pears by themselves make a kind of bland flavorless kind of jam. My Mom always made Pineapple Pear Preserves by combining the two fruits. It was pretty good, but other jams have more flavor.
Pineapple pear sounds so good! Now I’m wishing the pears had done well this year. There aren’t very many on the tree 🙁
Make pear-sauce. Instead of apple sauce. It is delicious! Peel n core the pears n place in a large pot. Add 1cup of sugar and however much cinnamon you like. Boil them untitled soft and mash with a potaoto masher to break up. Place in sterilized quart jars and water bath(boil) for 20 minutes. We love it!
looks good!
I have made several cans with the same recipe…all I can say IT IS SO WORTH IT!! it tastes amazing… the store bought doesn’t even come close!!
I’m about to pick some more plums from our tree so I can make a second batch 🙂
Hi Natash. In the cost to make sentence… U wrote peaches instead of plums…. Just an fyi.. this looks delish, will have to try
Whoops!! 🙂 Thank you Tonya.
These may be italian plums…that’s what ours looked like. One question.. I made jam from ours earlier and just boiled once (from recipe I got), is there reason you boil couple times? I notice you did that with peaches too.
Oh thank you. Sounds like I have fancy plums and didn’t even know it! Cooking it several times thickens it without turning the fruit into mush 🙂 Technically you could just do it once if you were satisfied with the consistency. Good question!