Keeping lettuce fresh without a refrigerator can be a bit challenging, as refrigeration is the most effective way to prolong its freshness. However, there are alternative methods you can try if you don't have access to a refrigerator:
Keep it cool and shaded: Find a cool and shaded spot in your home to store the lettuce. Avoid direct sunlight and warm areas, as they can accelerate wilting.
Wrap in a damp cloth or paper towel: Dampen a clean cloth or paper towel (but not soaking wet) and wrap it around the lettuce head. This will help maintain some moisture and prevent the leaves from drying out too quickly.
Place in a container with water: If you have a small container, you can place the lettuce upright with the roots in a little water. Make sure only the roots are submerged, not the leaves.
Use a damp cloth bag: If you have access to a cloth bag or produce storage bag, dampen it slightly and put the lettuce inside. The cloth will retain moisture and create a humid environment for the lettuce.
Store in a cellar or root cellar: If you have access to a cellar or root cellar, it can provide a cool and humid environment that will help keep the lettuce fresh for a longer time.
Harvest as needed: If you have the ability to grow lettuce, consider harvesting leaves as you need them instead of cutting the whole head at once. This way, the remaining leaves can continue to grow and stay fresh until you're ready to use them.
Keep in mind that these methods will only help extend the freshness of lettuce for a short period compared to refrigeration. If you have access to ice, you can also consider placing a layer of ice at the bottom of a container and then putting the lettuce on top to create a makeshift cooling environment.
Remember to check the lettuce regularly and remove any spoiled or wilted leaves to prevent them from affecting the rest of the bunch. Despite your efforts, lettuce will eventually start to degrade without refrigeration, so it's best to use it as soon as possible for the best taste and nutritional value.