Here are some tips on Romaine lettuce.
Buying it in bulk, trimming the outer leaves and washing it is a waste of time and labor.
Purchase Romaine hearts that come ready to use. There’s no waste or washing.
The outer leaves of the Romaine heads spoil much quicker than the hearts. You are paying for the weight of the entire head—how much of that do you have to trim because of spoilage. Also, the tough outer leaves are not suitable for salad
Cutting Romaine with a knife hastens browning where the cut is made. Hand ripping or tearing the leaves has the longest shelf life. If you insist on cuttng, make sure you only cut enough for a 24 hour period, or browning will occur.
Pre-washed, ready to use hearts of Romaine have a much longer shelf life than bulk because they do not have the outer green leaves with the larger ribs that spoil the head sooner. (I’m talking about the outer tough green leaves of the head, not the tender green leaves underneath the outer ones.
The care of ready to use Romaine is simple; remove the heads from their box, place them stem side down in a large plastic bin and cover the heads with a damp cloth–or, if they come packed in plastic–they can stay in the plastic bag within the case.
Excess moisture is the enemy of Romaine, it should not be wet. You certainly don’t want to keep it in water.
Ready to use hearts of Romaine are commonly available through your produce distributor. Since the huge popularity of Caesar salads has become a staple in food service, this product has become the standard.
Yes, it is more expensive than buying bulk, but once spoilage, labor and the preservative you are considering is added in, ready to use is far more cost effective.