When you buy romaine lettuce, it's usually at its peak freshness, but it can quickly go bad if not stored correctly. You see, temperature and humidity play a huge role in determining how long it stays fresh. So, make sure to store it in the fridge at a consistent temperature below 40°F (4°C).
Now, you might be wondering, what about washing and drying your romaine lettuce before storing it? Well, it's a great idea to give it a good rinse and spin dry to remove excess moisture, which can lead to spoilage. Just be sure to pat it dry with a clean towel or salad spinner to remove excess moisture.