r/fermentation • • 2d ago

Weekly "Is this safe" Megathread

8 Upvotes

Welcome to this week’s dedicated space for all your questions and concerns regarding questionable ferments.

Fermentation can sometimes look a little strange, and it is not always easy to tell what is safe, and what needs to be tossed and started over. To help keep the subreddit clean and avoid repeat posts, please use this thread for:

  • Sharing photos of surface growth you’re unsure about.
  • Asking if your ferment has gone wrong.
  • Getting second opinions from experienced fermenters regarding questionable ferments.

‼️Tips Before Posting‼️:

  • Mention what you’re fermenting (e.g., kraut, kimchi, kombucha, pickles, etc.).
  • Note how long it has been fermenting, and at what temperature.
  • Describe any smells, textures, or off flavors.

Remember that community members can offer advice, but ultimately you are responsible for deciding if your ferment is safe to eat or discard. When in doubt, trust your senses.

Happy fermenting!


r/fermentation • • 5d ago

Weekly Commercial Resources and Events MEGATHREAD

2 Upvotes

Because we get a lot of individual requests for posts that may violate rule 6 about limited self promotion, we have decided that we will have a weekly MEGATHREAD for people who want to post events, (virtual and in person), products and apps related to fermentation. The general rules about using this channel for self promotion still apply and the thread will be moderated.

Thread specific rules:

  1. NO SPAM still applies. Don't be posting your event multiple times and every single week.

  2. If you have produced a fermentation specific software or app and are looking for beta testers or the app is free, this is generally ok. Posts that for monetary gain (ie trying simply gain customers but not really contributing the sub) will be removed.

  3. You must fully describe what your post is about and should disclose what you have to gain from it. If you are hosting a regional fermentation conference and a inviting folks to register, for instance, make sure that it's clear what the costs, etc will be.

Finally - this idea is a TEST. If it is a total catastrophe, we will go back to a simple case by case system.


r/fermentation • • 11h ago

My paw paw vinegar grew a scoby?

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132 Upvotes

r/fermentation • • 12h ago

Fermented Mustard

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74 Upvotes

Have a lot ferments going on but was missing my fermented mustard that everyone loves. Took a cup each of yellow/brown/black mustard seed and then filled jar with my spicy LAB brine from my hotsauce. Always a winner. Saved my extra brine in case I need to loosen up the mustard when it’s done. 🌶️


r/fermentation • • 12h ago

Other Best mustard yet!

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54 Upvotes

Just determined that this batch of mustard is done. Left it on a northern windowsill for about 3 weeks, shaking every day. Started smelling..... Rough, but eventually mellowed out to a spicy acidic taste.

Started with both jars filled with cracked mustard seeds and 3% brine. Shook every day to degas and mix.

Not especially spicy, so I'd like to know how I can get that burns your nose spice in a fermented mustard


r/fermentation • • 1h ago

White film on beets

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• Upvotes

Went for it this year in the garden. Habaneros ginger and garlic on the right after one week, the rest just started. About two gallons of hot sauce from the jar since. My question is about a white film on the top of my jared beets after 1.5 weeks. No other veggies/peppers have it. No pics I'm afraid. I tossed the batch, out of concern/ignorance/a busy work schedule. Did I make a mistake? Or did I save my life?


r/fermentation • • 12h ago

Hot Sauce Fermenting Hot Sauce

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16 Upvotes

Hi first time making fermented hot sauce, blended garlic, peppers and onions with 2.5% salt added (no brine) to a clean jar and left the lid covered but not tight to allow CO2 out, smells great, no sign of mold or bubbles from fermentation. Is this normal?

Is there any clear signs it’s working properly or is no mold a good smell all I need to worry about?

Had no way to stop tiny pepper particles from floating up so that’s what you see in the top liquid.


r/fermentation • • 1d ago

I don’t have a problem. I can stop whenever I want!

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101 Upvotes

r/fermentation • • 9h ago

Fermenting hot sauce brown dots

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3 Upvotes

Are these normal? This is my second season doing this. Never noticed this before. I don’t use a weight in the jar either I just make sure I coat the top every day with brine


r/fermentation • • 1d ago

Kraut/Kimchi Put up 2 1/4 gallons of sauerkraut today. First time we've ever made it from cabbages we grew.

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199 Upvotes

Also some beets we grew and store carrots. Seasoned with salt and caraway.


r/fermentation • • 13h ago

Pickles/Vegetables in brine Advice please

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2 Upvotes

Hello there
I need some help and advice regarding my ph . This is my first ever hot sauce batch , it’s been in a jar for two weeks.
Salt is 3,5 % of total weight. Not sure what went wrong as pH strip showed 6.

Please can anyone help me what to do with this? Should I keep it ? Add vinegar? Is it safe to eat? Thank you


r/fermentation • • 1d ago

An Experiment; Lacto-Fermented Parsley Stems

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53 Upvotes

I had a pretty big parsley plant that needed to be harvested and a Lions game to watch, so I decided to do something different.

I pulled the plant out of the ground and picked all the leaves off of it. I'm going to save the leaves to make a pesto when it comes time to harvest my basil. I cleaned and chopped all the stems, along with some celery in my fridge that was going limp, and a​ head of garlic that I only used two bulbs from. ​

No plan yet for the final product, I honestly just wanted to use up stuff before it went in the garbage. The smell of everything together reminds me of the base of a chicken soup - I might process the fermented solids into a sauce to add to soups now that the season is here. Might be good on some pasta, and I could easily brine chicken with the resulting liquid. We'll see in two weeks or so.

The numbers;

26 grams Garlic, crushed

278g Celery, chopped

1g Bay leaves

8g Black Peppercorns

253g Chopped Parsley Stems

11g Salt

And for those curious, I wound up with 165g of Parsley Leaves.

Here's hoping bacteria witchcraft blesses me with something tasty. Happy fermenting, folks.


r/fermentation • • 10h ago

Free tool I built to calculate SPR bands and HMRC Alcohol Duty returns

1 Upvotes

Hey everyone,

Like a lot of you, I get an absolute headache every month trying to accurately track running production totals, map out Small Producer Relief (SPR) bands, and translate everything into the exact box orders HMRC asks for.

To make my own life easier, I built a web utility called Duty Sorted to calculate the math automatically. I’ve made a standalone version of the calculator 100% free and un-gated for the community—no sign-up or card required:

👉 [\[Link to your free calculator page\]](https://dutysorted.co.uk/spr-calculator/)

To show you how it breaks down messy edge cases, here is an example of it calculating a 5.5% draught beer batch (1,000 litres) for a producer nearing the threshold:

Tax Type Code: 356 (Beer from 3.5 to 8.4 percent, eligible for draught relief)

Pure Alcohol: 55.0000 litres

Full Rate: £19.45 per litre of pure alcohol

Duty Due: £1,069.75 (rounded down to the penny)

It even triggers alerts if your annual production crosses the 4,500 hl limit so you know exactly when SPR stops applying.

If you're a small cider maker, brewery, or distillery filing these monthly, I hope this saves you some spreadsheet math this month.

Check it out and let me know if you notice any weird edge cases with your specific tax codes—I want to keep updating it and making it better for the trade! 🍻


r/fermentation • • 1d ago

Pear ferment suggestions

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14 Upvotes

Anybody got any suggestions on how to ferment pears and what to use that for? I've seen online salt brine ferment, honey ferment and one with some kombucha starter tea. Any suggestions are appreciated


r/fermentation • • 1d ago

Ginger Bug/Soda Ginger bug grapefruit soda

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59 Upvotes

1/4 cup ginger bug and 4 fresh squeezed grapefruits


r/fermentation • • 1d ago

Beer/Wine/Mead/Cider/Tepache/Kombucha Decanted the beet kvass

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15 Upvotes

Decided my big jar (https://www.reddit.com/r/fermentation/s/0MCD8v5GMA) was ready to decant. Got three quarts plus a little for quality control, plus more pickled beet morsels than I know what to do with. Added a little rock sugar to the jars for a little effervescence before they go to the fridge


r/fermentation • • 1d ago

Kraut/Kimchi Sauerkraut additions

11 Upvotes

Hello! I am about to do sauerkraut and was curious if anybody had some really good additions or combinations, especially unusual ones. I’m trying to change it up from plain or caraway seed.


r/fermentation • • 1d ago

Object of Beauty

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10 Upvotes

Periodically I spoon out a few cloves and eat. So delicious!!!


r/fermentation • • 18h ago

Kraut/Kimchi Unsure with progress of my kraut

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1 Upvotes

I’m not sure if it’s an issue that it seems like it’s stopped producing gases. It also is in a jar that doesn’t seem to create a tight air seal, is that going to create problems?

Thank you in advance


r/fermentation • • 1d ago

Kraut/Kimchi Ombre Kraut

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6 Upvotes

Behold! Red on top, green on bottom. 1 week in.


r/fermentation • • 2d ago

Ginger Bug/Soda I forgot about my ginger bug and have grown an alien

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1.1k Upvotes

Hello- so I had a ginger bug some time at the start of 2025- it may have even been earlier than this. it was doing pretty well and then ADHD struck and I’ve completely forgotten about it at the back of a cupboard. remembered about it today and THIS is what I found. Now I’m not opening this bad boy but before I throw the ENTIRE jar away can someone please tell me what has grown because I’ve searched and searched and cannot find anything even remotely similar to this🤣


r/fermentation • • 1d ago

Kraut/Kimchi What am I doing wrong (sauerkraut prep)?

4 Upvotes

Im pretty new at the fermentation game. I tried to prep sauerkraut, but can't seem to ever pull out enough water from the cabbage to submerge the cabbage in the fermentation jar. I've salted the cabbage and sort of kneaded the salt into the cabbage. Then let it rest for 20 mins. The leaves were definitely moist, and there was some water at the base of the prep bowl, but not enough to submerge the leaves completely in the fermentation jar. So I resorted to mixing a water/salt brine and then poured it in to the jar to submerge the leaves.

How do you guys get the natural juices out enough to submerge the kraut? Or was 20 mins just not long enough of a wait?


r/fermentation • • 1d ago

Kraut/Kimchi Saurkraut finished

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9 Upvotes

Did a practice run with store bought as I just started a bunch of cabbages for fall/winter growing in Florida.
Tart, crisp, refreshing. 3 weeks total. Bubbles slowed/stopped past few days.

Cabbage, water, salt, mustard seed, caraway seed


r/fermentation • • 1d ago

Fresh Hot Sauce

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12 Upvotes

Fermented from 9/17-10/11/2026. Various peppers, garlic, shallots, one carrot, added cinnamon stick for first 2-3 days, pepper corn, cayenne around 6% salt by pepper weight. Tastes good can definetly smell the cinnamon though don’t think it makes a taste difference


r/fermentation • • 1d ago

Fruit First time fermenting in vacuum bags

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23 Upvotes

Some garden cherry tomatoes with 2% salt, been going for about a week

Got a food saver from the thrift store, and these little guys are aboard its maiden voyage under my roof. Didn’t expect them to be quite so active so quickly.

P.s. are we calling tomatoes fruit here, or is that too annoying