Yes, lettuce is included in the leafy greens portion of the vegetable group. The Dietary Guidelines for Americans recommend 2 ½ cups of vegetables per day based on a 2,000-calorie diet.

Loose leaf lettuce can last 7 to 10 days when properly stored, but head lettuce stays fresh much longer than that. ... Compared to other leafy greens, lettuce reigns as the long shelf life champion.

Here's which types of lettuce are most popular, why these greens are good for you and what you need to be mindful of as you include more in your diet.

Leafy greens like lettuce will bolt, or go to seed, when temperatures reach 80 degrees Fahrenheit. Growing leafy greens in containers that can be moved to more shaded areas in the landscape as ...

Salad lovers, take note: Lettuce is more vulnerable to E. coli contamination than other leafy greens, researchers report.

Most of the outbreaks were linked to romaine lettuce, making up 54 percent, followed by spinach (17 percent), iceberg (17 percent), and 4 percent each for cabbage, green leaf, and kale.

This National Salad Month, Little Leaf Farms offers a no-wilt solution with a chance to win a year's supply of fresher, longer-lasting lettuce and a $2,500 grocery gift card DEVENS, Mass., May 15 ...