I never really thought about it before, but being such a large country with huge climate variations does this mean that most things are in season somewhere, all year round?
Well, to some degree. A lot of winter veg comes from Mexico. Some of it is good, most is just okay.
The only time I can get good tomatoes is summer where I live. Citrus from Texas is best in winter, especially Ruby Red Grapefruit.
I can't think of everything while I sit here at home, but I know what's in season when I am in the store. Here is a lit I found on the interwebs.
December
Broccoli
Brussels sprouts
Cabbage
Cauliflower
Grapefruit
Kale
Leeks
Mushrooms
Oranges
Papayas
Parsnips
Pears
Pomegranates
Rutabagas
Sweet potatoes
Tangelos
Tangerines
Turnips
January
Broccoli
Brussels sprouts
Cabbage
Cauliflower
Grapefruit
Kale
Leeks
Lemons
Oranges
Parsnips
Rutabagas
Tangelos
Tangerines
Turnips
February
Broccoli
Brussels sprouts
Cabbage
Cauliflower
Grapefruit
Kale
Leeks
Lemons
Oranges
Parsnips
Rutabagas
Tangelos
Tangerines
Turnips
March
Artichokes
Broccoli
Brussels sprouts
Cauliflower
Leeks
Lettuce
Mushrooms
Parsnips
Pineapples
Radishes
Rutabagas
Turnips
April
Artichokes
Asparagus
Broccoli
Cauliflower
Leeks
Lettuce
Mushrooms
Pineapples
Radishes
Rhubarb
Spring peas
May
Apricots
Artichokes
Asparagus
Cherries
Lettuce
Mangoes
Okra (Okra is one of the top foods that can reduce stress.)
Pineapples
Radishes
Rhubarb
Spring peas
Strawberries
Swiss chard
Zucchini
June
Apricots
Blueberries
Cantaloupe
Cherries
Corn
Kiwi
Lettuce
Mangoes
Peaches
Strawberries
Swiss chard
Watermelon
Zucchini
July
Apricots
Blackberries
Blueberries
Cantaloupe
Corn
Cucumbers
Green beans
Kiwi
Kohlrabi
Lettuce
Mangoes
Okra
Peaches
Peppers
Plums
Raspberries
Strawberries
Summer squash
Swiss chard
Tomatoes
Watermelon
Zucchini
August
Acorn squash
Apples
Apricots
Blueberries
Butternut squash
Cantaloupe
Corn
Cucumbers
Eggplant
Figs
Green beans
Kiwi
Kohlrabi
Lettuce
Mangoes
Okra
Peaches
Peppers
Plums
Raspberries
Strawberries
Summer squash
Swiss chard
Tomatoes
Watermelon
Winter squash
Zucchini
September
Acorn squash
Apples
Beets
Butternut squash
Cantaloupe
Cauliflower
Eggplant
Figs
Grapes
Green beans
Lettuce
Mangoes
Mushrooms
Okra
Peppers
Persimmons
Pomegranates
Pumpkins (Pumpkin isn’t just for caring; it has many healing health benefits.)
Spinach
Sweet potatoes
Swiss chard
Tomatoes
October
Acorn squash
Apples
Beets
Broccoli
Brussels sprouts
Butternut squash
Cabbage
Cauliflower
Cranberries
Grapes
Leeks
Lettuce
Mushrooms
Parsnips
Persimmons
Pomegranates
Pumpkins
Rutabagas
Spinach
Sweet potatoes
Swiss chard
Turnips
Winter squash
November
Beets
Broccoli
Brussels sprouts
Cabbage
Cauliflower
Cranberries
Leeks
Mushrooms
Oranges
Parsnips
Pears
Persimmons
Pomegranates
Pumpkins
Rutabagas
Spinach
Sweet potatoes
Tangerines
Turnips
Winter squash