Mould happens… but your sourdough can last longer
If you’ve ever left a slice of bread out for too long and discovered a fuzzy green surprise, you know the feeling: panic! But fear not — we’re here to tell you that mould is nothing to be afraid of, especially when it comes to fresh sourdough.
Unlike industrial bread, which often contains preservatives like fermented wheat flour to slow mould growth, fresh sourdough is alive. Its natural fermentation gives it a slight edge against mould compared to regular yeasted bread, thanks to the acids and friendly bacteria developed during the sourdough process. That said, even sourdough isn’t invincible — eventually, mould can appear if it’s stored too long.
So, how can you keep your sourdough fresh and mould-free?
Here are our top tips:
- Store smart
- Keep your sourdough in a paper bag or a breathable bread bag at room temperature. Plastic can trap moisture and encourage mould. Our linen loaf bag is perfect for keeping bread fresh.
- Avoid damp environments
- Moisture is mould’s best friend. Keep your bread away from humid surfaces or damp bread bins.
- Slice as you go
- Cut only what you need. Less exposed surface = longer-lasting bread.
- Freeze for later
- Sourdough freezes beautifully. Slice first (or grab a pre-sliced loaf), then pop pieces in the freezer. Toast or defrost when needed — fresh taste preserved. Or, if you prefer convenience, we offer sliced loaves in freezer bags, ready to freeze and enjoy when you want them.
- Regenerate your loaf
- A little stale? Don’t bin it yet. Pop your sourdough in the oven to bring it back to life — crispy crust, soft centre. Watch our video on how to regenerate your bread.
- Use stale bread in recipes
- Before it ever goes mouldy, stale sourdough makes brilliant croutons, breadcrumbs, bread pudding, or panzanella salad. Delicious, zero waste. Check out our recipes!
- Trust your senses
- A little dryness? Toast it. A little hard crust? That’s just character. Any fuzzy green or blue? Time to compost — but no need to panic!
Look out for the words in bold italics — they’ll take you to videos and recipes.
The bottom line: fresh sourdough is alive, but naturally resistant to mould — no need for preservatives like fermented wheat flour. With a little care, your sourdough stays delicious for longer, letting you enjoy every bite the way it was meant to be.
Serving and slicing tips for your sourdough bread
Got an unsliced loaf of sourdough bread and wondering how to keep it fresh and tasty? We’ve got you covered with some fun and practical storage and serving tips. Keeping your bread unsliced is a smart move, but how do you prevent it from going stale? Sourdough bread is famous for its long shelf life, thanks to its natural leavens and friendly bacteria that fend off mould and dryness. But even sourdough can eventually go stale. Here are some tips to ensure you get the most out of your loaf and enjoy every last bite!
Bread Care
Before diving into bread care tips, let’s outline the average shelf life for our different types of bread:
- Unsliced (kept in original packaging or a linen loaf bag): 5-7 days
- Sliced (kept in original packaging): 3-5 days
- Once defrosted: 2-3 days
Storage Tips
- Keep Your Loaf in a Linen Bag: Store your loaf in a linen bag and place it in a bread bin. Linen bags help maintain the right level of moisture, preventing your bread from drying out too quickly.
- Freeze your bread: We are big advocates of freezing your bread to maintain its freshness. If you don’t plan on eating the whole loaf in one go, cut it in half. Put one half in the linen bag, and the other in the freezer. Plus, freezing can also have health benefits.
Note: If you freeze your bread, we recommend defrosting it for an hour before toasting. Alternatively, you can toast it directly from frozen using the defrost function on your toaster.

Serving Tips
- Day 1: Freshening Up Your Loaf:
- Preheat your oven to 220°C.
- Place your loaf in the oven for 6-7 minutes, depending on how dark the bread is when it arrives. This will crisp up the crust, soften the crumb, and give you that just-baked freshness. It’s also a great way to impress your guests.
- Day 3 or 4: Refreshing Your Bread:
- Place your whole or cut loaf under running water until it is completely covered.
- Place it in a preheated oven at 220°C for 9 minutes. This technique helps revive the loaf, restoring its crust and softening the interior.
Cutting Tips
- Slicing a Steaming Crusty Loaf:
- When you heat sourdough bread, the crust hardens, and the crumb softens, making it challenging to slice.
- Use a sharp serrated bread knife to slice it while it’s still warm. A serrated knife is essential to cut through the crust without crushing the bread.
- Avoid Crushing Your Bread:
- No matter how sharp your bread knife is, you may still find yourself pressing too hard and crushing the bread while trying to cut through that crust.
- My top tip? Turn the loaf upside down instead of flat (like in the photo below). Slicing the bread in this position can help you avoid crushing your beautiful bread, preserving its structure and texture. If you are having trouble visualising what I mean, check out my bread care video on Instagram.
Recipes for stale bread
If your bread is over a week old and the tips above don’t work, fear not. We have some recipes designed specifically for stale bread. For example, why not embrace your Italian side with a Tuscan bread soup or a Panzanella salad? If you’ve got more of a sweet tooth, our toffee apple bread and butter pudding might just hit the spot. Discover all our recipes on our blog.
By following these tips, your sourdough bread will remain fresh, delicious, and easy to serve. Enjoy every slice!