The fastest way to get a sourdough starter
You can buy a sourdough starter online from baking supply shops, receive one free from a local baker or friend, or grow one yourself from flour and water in five to seven days. The cheapest route is asking around your community first — many bakers keep extra starter and give it away. If you want to buy, online sellers ship dried or fresh starter in the mail, and local bakeries sometimes sell small jars for five to fifteen dollars.
The choice depends on how soon you want to bake and whether you prefer to start with an established culture or build one from scratch. A purchased or gifted starter is ready to use in one to three days. Growing your own takes longer but costs almost nothing and teaches you how the fermentation works.
Key Takeaways
- Ask local bakeries, farmers markets, and friends first — many will give you starter for free because they have more than they need.
- Online sellers ship dried starter (lasts months unopened) or fresh starter (arrives active and ready to feed), with shipping costs between five and twenty dollars.
- You can grow starter at home using only all-purpose flour and water, ready to bake with in five to seven days.
- Purchased starter usually needs one to three days of feeding before it doubles reliably; homemade starter is ready when ready after it passes the float test.
Getting starter free from local sources
Bakeries that make sourdough bread maintain multiple jars of starter and often have more than they use. Call or visit in person and ask if they have extra to give away. Many bakers are happy to send you home with a small container because they feed their starter daily anyway and appreciate someone using it.
Farmers markets with a sourdough vendor are another good place to ask. The baker may have starter on hand or know someone nearby who does. Friends or family members who bake sourdough will almost certainly say yes — starter multiplies quickly, and most home bakers are looking for reasons to share theirs.
Community groups on Facebook or Nextdoor often have posts from people offering starter. Search your town name plus "sourdough starter" to see if anyone local is giving it away. This method is free and you can pick it up the same day.
Buying starter online
Online baking suppliers sell two types: dried starter and fresh starter. Dried starter comes as a powder or flakes, stays shelf-stable for months, and costs eight to twenty dollars plus shipping. You mix it with flour and water to rehydrate it, then feed it daily for three to five days before baking. Popular sellers include Cultures for Health, Sourdough International, and King Arthur Baking Company.
Fresh starter arrives in a small jar, already active and fed. It costs twelve to twenty-five dollars plus shipping and is ready to use in one to three days of feeding. The downside is that it must stay cool during shipping and you need to use or feed it when ready when it arrives. Etsy has many small-batch sellers who ship fresh starter, as do specialty baking sites.
Shipping costs vary by seller and location, usually between five and twenty dollars. Some sellers offer flat-rate shipping or free shipping above a certain order amount. Check the seller's reviews for feedback on how well the starter arrived and how quickly it became active.
Growing your own starter from scratch
You need only flour, water, and a clean jar. Mix equal parts flour and water (one-quarter cup of each is a good starting amount) in a jar, stir well, cover loosely with a cloth or coffee filter, and leave it on the counter. Each day, discard half the mixture and feed it with equal parts flour and water again.
By day three or four, you should see bubbles and smell a sour or yeasty odor. Keep feeding daily. By day five to seven, the starter should double in size within four to eight hours of feeding — this is called the float test. Drop a small spoonful into water; if it floats, the starter has enough gas production to leaven bread. Once it passes the float test, it is ready to use.
This method costs almost nothing (a few cents of flour) and gives you a starter perfectly adapted to your kitchen's temperature and humidity. The downside is the wait and the daily feeding commitment during the growth phase. Many people find the process satisfying because they can see fermentation happening in real time.
What to look for when choosing a starter
If you are buying, check whether the starter is labeled for bread baking or other uses — some are sold for pancakes or other applications and may have different fermentation characteristics. Read reviews that mention how quickly the starter became active and how well it performed in actual bread recipes.
For dried starter, look for sellers who package it in airtight containers and ship it quickly. For fresh starter, check that the seller includes feeding instructions and information about what the starter should look like when it arrives. A reputable seller will tell you the age of the starter and what flour it was fed with, because some starters perform differently depending on the flour type.
If you are getting starter from a friend or baker, ask how old it is and what flour they feed it with. A starter that has been maintained for years often has a more complex flavor, but a young starter works just as well for bread. Ask for a small amount of the liquid on top (called the hooch) to be included if possible — it speeds up the reactivation process.
Preparing your starter for first use
Purchased or gifted starter usually arrives either very active or dormant, depending on how it was stored and shipped. If it is fresh and bubbly, feed it once and let it sit at room temperature for four to eight hours. If it looks separated or smells strongly of alcohol, that is normal — stir it, feed it, and wait for it to become active again.
Dried starter needs to be rehydrated. Mix it with equal parts flour and water, let it sit for a few hours, then feed it daily for three to five days until it doubles reliably within four to eight hours of feeding. Keep it at room temperature (around 70 degrees Fahrenheit) during this period.
Once your starter reliably doubles after feeding, you can use it to make bread. Store it in the refrigerator between bakes if you are not baking weekly — feed it once a week and it will stay healthy for months or years with minimal care.
Comparing your options
| Source | Cost | Time to use | Best for |
|---|---|---|---|
| Local baker or friend | Free | 1–3 days | when ready baking, community connection |
| Dried starter online | $8–$20 plus shipping | 3–5 days | Long shelf life, lower shipping cost |
| Fresh starter online | $12–$25 plus shipping | 1–3 days | Faster set up, established culture |
| Grow from scratch | Less than $1 | 5–7 days | Learning the process, no shipping |
Frequently Asked Questions
Can I use any flour to grow or feed a starter?
All-purpose flour works fine for growing and maintaining starter. Whole wheat or rye flour ferments faster and can add flavor, but they are not necessary. Avoid bleached flour if possible — unbleached all-purpose is the standard choice. Once your starter is active, you can experiment with different flours to see how they affect taste and rise.
How long does dried starter last if I don't use it right away?
Dried starter stays viable for several months to a year if stored in an airtight container in a cool, dry place. Check the package for the best-by date. Even if it looks old, it is usually worth trying to rehydrate — dried starter is very hard to kill. If it does not become active after five to seven days of daily feeding, contact the seller.
What if my starter smells like nail polish or acetone?
That smell is acetone, produced by yeast and bacteria during fermentation. It is harmless and normal, especially in a young or hungry starter. Stir it back in or pour it off — either way is fine. Feed your starter and the smell usually fades within a day or two. If the smell persists after several feedings, the starter may need warmer conditions or more frequent feeding.
Do I need to use the same flour the starter came with?
No. Your starter will adapt to whatever flour you feed it. If you switch from whole wheat to all-purpose, it may take one or two feedings to adjust, but it will work fine. Many bakers switch flours depending on what they have on hand or what they are baking.
Can I bake with starter that has not been fed in weeks?
Not reliably. A neglected starter needs at least one or two feedings at room temperature to become active again before you use it for bread. Feed it, wait for it to double, then feed it again. Once it is doubling consistently within four to eight hours, it is ready to bake with.