Hi Susan, while altitude may speed up the fermentation process a bit, we suspect that the bigger culprit is the frequency of feeding. Once fully developed, one feeding per day should be sufficient, but while building the starter, we recommend feeding every 12 hours. While there are many different ways to build and maintain a sourdough starter, it may help to take a read through our guide. Even if you don't choose to adopt the method itself, you might pick up some helpful hints. Mollie@KAF

• Reply