Broccoli

A cool-season crop brocolli grows best when daytime temperatures are low. Grow in both spring and fall, but avoid mid-summer crops as hot weather can cause premature bolting. Romanesco types are especially handsome choices for edible landscaping. One stalk of cooked broccoli gives you 75mg of vitamin C, 1300 IU of beta carotene, 3g of protein and 5g of dietary fibre with only 40 calories.