Kohlrabi (late fall) comes into season by the end of fall but stays at its sweet best into winter.
Leeks more than about 1 1/2 inches wide tend to have tough inner cores. The top green leaves should look fresh – avoid leeks with wilted tops.
Lemongrass grows in warm and tropical areas and is usually available fresh in the U.S. towards mid-fall.
Lettuce (in warmer climates), like other greens, bolt and turn bitter when the weather gets too warm, making it in-season somewhere in the U.S. year-round.
Limes are harvested in semi-tropical and tropical areas in summer and fall.
Mushrooms (wild) have different seasons throughout the U.S. Most wild mushrooms other than morels are in season in summer through fall.
Okra (early fall) needs heat to grow, so a nice long, hot summer in warmer climates brings out its best. Look for firm, plump pods in late summer and early fall.
Onions come from storage all year round, but most onions are harvested in late summer through the fall.
Parsnips look like white carrots and have a great nutty flavor. Look for thinner parsnips, since fatter ones tend to have a thick, woody core you need to cut out.
Pears have a season that runs from mid-summer well into winter, depending on the variety and region.
Peppers (early fall) – both sweet and spicy- are harvested in late summer and early fall.
Persimmons are available for a short window in the fall and early winter – look for bright, heavy-feeling fruits.
Pomegranates only ripen in warmer climates. They are in season starting in October and are usually available fresh through December.
Purple potatoes are great storage vegetables, but most varieties are harvested in the fall.
Pumpkins are the most common winter squash and come into season in September in most areas.
Quinces are a most under-appreciated fruit. Bright and tart, quince jellies and desserts are a fall and early winter favorite.
Radishes (all types) are so fast-growing that they can be sown several times during the growing season in most climates. Fall marks the end of the season for small red radishes and the beginning of the season for larger daikon-type radishes.
Rutabagas are also known as “yellow turnips” and “Swedes.” They are a sweet, nutty root vegetables perfect in stews, roasted, or mashed with plenty of butter.
Sweet potatoes, winter squash and zucchini are also great to eat this season.