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r/fermentation PUBLIC

Welcome to r/fermentation! This community is devoted to the craft, science, and culture of fermentation. From sauerkraut and sourdough to kombucha, kimchi, yogurt, and beyond, we explore the traditions and innovations that bring microbes, time, and ingredients together. Our aim is to promote safe, accurate, and inspiring fermentation practices while fostering curiosity, creativity, and shared knowledge for beginners and experts alike.

318,454 members
Created: Jul 2009
Language: EN
POSITIVE SENTIMENT
Last analyzed: May 31, 2026 12:00
Marketing Summary

r/fermentation is a PUBLIC community on Reddit with over 318,454 members. It currently has a positive sentiment with an engagement rate of 0.4%. With a community friendliness score of 80, this subreddit presents a moderate conversion potential for authentic brand participation. Self-promotion is generally allowed according to recent analysis.

80
Friendliness Score
0.4%
Engagement Rate
54
Conversion Potential
2.0%
Monthly Growth
Marketing Analytics
31.2
Avg Post Score
10.4
Avg Comments
25
Brand Mentions
0
Posts/Hour
Top Post Types
text 90.0% (45)
link 8.0% (4)
image 2.0% (1)
Peak Activity Hours
Times shown in UTC (Coordinated Universal Time) Local times are automatically converted based on your browser's timezone
12PM UTC
High
~45 active
Community Culture
Community Sentiment POSITIVE
Friendliness Score: 80/100
904
Avg User Karma of Top Posts
70%
Commercial Acceptance
Content Preferences
Moderation Patterns
Rules & Compliance
10
Total Rules
Images
Videos
Self Promotion
Require Flairs
Public
Posting Requirements & Restrictions
No limit
Minimum Karma
No limit
Min Account Age (days)
ANY
Submission Type
Enabled
Flair System
Subreddit Rules
  1. Check sub resources before posting.: Before posting any questions, please check the Wiki, Tips, and/or Troubleshooting pages under the sub's banner, as your question may have already been answered. Many fermentation questions are commonly posted here, so old posts can also be used as a resource.
  2. All posts must be fermentation-related.: All posts must include food and/or beverage fermentation in some way. All other posts will be removed.
  3. Don't be rotten.: Just like rotten ferments, rotten posts/comments will be thrown out. Racist, sexist, homophobic, or other hateful content will be removed. Multiple infractions will result in a ban.
  4. No unsafe practices or accidental fermentations.: Limited posts/comments about any unsafe practices. This includes, but is not exclusive to: Accidental ferments, using an unsafe jar for pressure, not measuring ingredients, etc. This does not mean that we will take these posts/comments down, but we will have a look, maybe pin a comment, or start a conversation about it and change the flair. Excessively unsafe posts/comments may be subject for removal.
  5. No graphic pictures.
  6. graphic/gorey pictures of accidents while fermenting. The exception to this rule are text posts about your incident as a warning so hopefully others don't make the same mistakes.
  7. Limited self-promotion.: It is great that you have a blog, YouTube channel, Instagram page, business, other group, subreddit, etc....but this is not the place to promote it. Any rare exceptions to this rule must be sought via messaging the mods and receive PRIOR mod team approval before posting/commenting.
  8. posts or comments including recipes or pictures that have been generated using AI, or that use the help of AI.
  9. No posts about mold/kahm or asking if something has gone bad.
  10. posts relating to or asking about unknown "stuff" in a fermentation, or if a fermentation has gone bad. This includes joke posts about kahm or mold. There is now a pinned weekly megathread for these posts as to not try and clutter the subreddit.
  11. No posts about blue garlic.
  12. posts displaying/asking about/or discussing blue garlic. It's natural to occur when the pH decreases to a certain amount.
  13. No medicinal claims.
  14. posts or comments that promote fermented foods as cures or treatments will be allowed. While fermentation can be a part of a healthy diet and gut biome, this subreddit is not a place for medical advice or unverified health claims.
Marketing Data Updated
May 31, 2026
Rules Updated
Jul 19, 2026
Compliance Updated
Jul 19, 2026

What is r/fermentation?

r/fermentation is a public Reddit community created in July 2009 with over 318,454 members. Welcome to r/fermentation! This community is devoted to the craft, science, and culture of fermentation. From sauerkraut and sourdough to kombucha, kimchi, yogurt, and beyond, we explore the traditions and innovations that bring microbes, time, and ingredients together. Our aim is to promote safe, accurate, and inspiring fermentation practices while fostering curiosity, creativity, and shared knowledge for beginners and experts alike.

The community has a positive sentiment and an engagement rate of 0.4%. With a friendliness score of 80, it is considered very welcoming to new members.

Self-promotion is generally allowed, making it a potential opportunity for authentic brand participation.

Frequently Asked Questions about r/fermentation

r/fermentation is a public Reddit community with 318,454 members. Welcome to r/fermentation! This community is devoted to the craft, science, and culture of fermentation. From sauerkraut and sourdough to kombucha, kimchi, yogurt, and beyond, we explore the traditions and innovations that bring microbes, time, and ingredients together. Our aim is to promote safe, accurate, and inspiring fermentation practices while fostering curiosity, creativity, and shared knowledge for beginners and experts alike.

With a conversion potential of 54 and an engagement rate of 0.4%, r/fermentation presents a moderate opportunity for authentic brand participation. Self-promotion is generally allowed, but always follow community guidelines.

r/fermentation has 10 community rules.

r/fermentation has an engagement rate of 0.4% with an average post score of 31.2 and an average of 10.4 comments per post. The community sentiment is positive with a friendliness score of 80 out of 10.
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