Quick Answer
For fermenting sourdough starter outdoors, the best container types are glass, ceramic, or BPA-free plastic containers, as they don't impart flavors or toxins to the starter. These containers should be sealed or covered to maintain humidity and protect the starter from contaminants. Look for containers with wide mouths for easy handling and cleaning.
Choosing the Right Container Size
When selecting a container for fermenting sourdough starter outdoors, consider a size that can hold about 1-2 cups of starter. This allows for easy handling and maintenance, while also providing sufficient space for the starter to expand and contract. For example, a 2-quart (2-liter) glass container with a wide mouth is ideal for this purpose.
Container Materials and Safety Considerations
When choosing a container, prioritize materials that are safe for food contact and won’t impart flavors or toxins to the starter. Glass containers, such as Mason jars or Pyrex containers, are excellent options. Ceramic containers, like ceramic crocks or bowls, are also suitable, but ensure they are food-grade and free of lead or other contaminants. BPA-free plastic containers, such as those made from polypropylene or polyethylene, are another safe option.
Tips for Maintaining Humidity and Temperature
To maintain a healthy sourdough starter outdoors, it’s essential to regulate humidity and temperature. Cover the container with a cloth or plastic wrap to maintain humidity, and place it in a spot with a consistent temperature between 68°F and 75°F (20°C and 24°C). If you live in a dry climate, consider using a humidifier or placing the container in a covered area, like a screened-in porch or a greenhouse. Regularly monitor the starter’s activity and adjust the container’s location or humidity levels as needed.
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