How to Revive Dehydrated Sourdough Starter
- Autumn
- 3 days ago
- 4 min read
How to Revive and Maintain Dehydrated Sourdough Starter "Poppy"
There’s something quietly reassuring about bringing a sourdough starter back to life. After months (or even years) tucked away in dried flakes, a dehydrated sourdough starter can be revived with just water, flour, and a little patience. Below, I’ll share exactly how to revive a dehydrated sourdough starter, along with simple tips for maintaining it once it’s active again.
How to Revive Your Dehydrated Sourdough Starter
Equipment
Small jar with lid (I prefer glass)
Small spatula or spoon
Basic kitchen scale
Ingredients
5 grams dried sourdough starter (half the bag of Poppy)
Unbleached white bread flour or all-purpose flour
Filtered, room temperature water (avoid using chlorinated water)
Directions
Day One: Place 5 grams dried sourdough starter in a small jar. Add 25 grams room-temperature water and stir until all of the dried starter is fully immersed. Loosely cover and let sit for 30 minutes to 1 hour to soften and dissolve. Add 20 grams of flour and stir until mostly smooth and fully combined. Loosely cover and store at room temperature for 24 hours.
Note: We are using slightly more water than flour for the first feeding to help fully rehydrate the dried starter and encourage yeast activity.
Day Two: Transfer 20 grams of the starter mixture to a clean jar and discard the rest. Add 25 grams of water and 25 grams of flour. Stir until smooth, loosely cover, and leave at room temperature for 24 hours. You probably won't see much activity yet. This is normal!
Day Three to Day Five: Repeat the Day Two discarding and feeding every 24 hours (20g starter : 25g water : 25 g flour).
By Day Five, you should begin to see signs of activity:
Small bubbles throughout the mixture
A pleasantly tangy, yeasty aroma
Doubling in volume within 6–12 hours after feeding (depending on room temperature)
If your starter isn’t quite there yet, continue daily feedings for a few more days. Once it reliably doubles after feeding, you can begin baking and continue a regular maintenance schedule (see below). If your home runs cool, placing the jar in a slightly warmer spot (near a stove or on top of the fridge) can help speed activity.
If you’d like more detailed guidance, including feeding schedules, troubleshooting tips, and simple sourdough recipes — I share everything inside my Sourdough Mini Guide. It’s designed to walk you through the process with clarity and confidence, whether you’re just starting out or returning to baking after a break.
How to Know When Your Sourdough Starter is Active and Ready to Use
You will know your starter is ready for baking when it shows these signs:
It doubles (or even triples) in size after feedings. Depending on your home’s temperature and humidity, this can take 6–12 hours. To track growth, place a rubber band around the jar right after feeding. This makes it easy to see how much your starter rises and falls over time.
It's bubbly, fluffy and elastic.
It smells ripe, yeasty and slightly sweet.
If you’re unsure if your starter is ready, you can try the float test.
Float Test:
Fill a cup or small bowl with warm water.
Spoon a bit of starter onto the water.
If it floats, it’s ready to use! If it sinks, it’s not quite ready (or it's past its peak)
How to Maintain Your Starter
Now we'll go over how to regularly feed and maintain your starter. It might sounds funny to "feed" a sourdough starter, but remember, it's alive! The starter is full of healthy yeasts and bacteria and to keep it active and happy, it needs fuel just like us.
The ratio you feed your starter will be depend on the amount you need for a recipe and your preferred feeding schedule. You can read more about feeding ratios in the Sourdough Mini Guide. But to keep things simple, I have outlined my personal favourite 1:5:5 feeding ratio below. The 1:5:5 ratio (by weight) means 1 part starter : 5 parts water : 5 parts flour. This is my favourite because it takes my starter around 10 hours to reach peak activity with this ratio, so I can feed it before bed and it will be active and ready to bake with first thing in the morning.
Directions:
In a clean jar, combine 10 grams of starter, 50 grams water (unchlorinated), and 50 grams of flour (unbleached all-purpose or bread flour).
Mix until thoroughly combined and mostly smooth.
Cover with a loose fitting lid and leave at room temperature until the starter reaches peak activity. This will take 6-12 hours depending on your environment.
This feeding ratio creates 110 grams of total starter, providing 100 grams of starter to use in a recipe, while leaving 10 grams left over to continue the feeding cycle.
To keep your starter strong and established, feed it approximately every 24 hours. You can choose any time of day that fits your personal and baking schedule.
Get to Know Your Starter
Everyone's sourdough starter will behave a bit differently because everyone's environment is a bit different. A sourdough starter is a living culture meaning it reacts to its environment including the temperature, humidity, season, flour type, water, and even the microbes provided from its owner (yes, your own microbes affect your sourdough starter- how cool)!
Because of this, no two starters will be the same which makes it impossible for me to tell you exactly when your starter is ready and exactly when it will be at its peak. This article is a great place to start and get you on your way, but now it's up to you to get to know your starter and to learn its love language (and don't forget to name it)!
I also have many sourdough tips and recipes on my Instagram page @evolvingautumn, so make sure you're following along to get the latest updates.
Reviving and maintaining your starter is just the beginning! If you're looking for deeper guidance on maintain a strong starter, troubleshooting tips and baking beautiful sourdough loaves at home, check out my Sourdough Mini Guide!
Happy sourdough-ing!
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