The exception is one study in the Netherlandsâthe Netherlands Cohort Study on Diet and Cancerâin which women (but not men) who had a high intake of cruciferous vegetables had a reduced risk of colon (but not rectal) cancer (12).
Crops: beans, celery, corn, cucumbers, New Zealand spinach, and summer squash. Temperatures: Tender vegetables grow with daytime temperatures above 55Â°F, and are intolerant of frost. When to plant: 1  Based on soil temperature, refer to Table 2.2  Soil is adequately dry to work.3  These crops may be planted (from seed) around the date of the average last spring frost.emperatures: Very tender vegetables are not only intolerant of frost, but also cool spring winds. They need daytime temperatures above 60Â°F, and prefer temperatures of 70Â°F to 95Â°F. A week of daytime temperatures below 55Â°F may stunt the crop.
Slow or fast, roasting yields great flavor. You can roast vegetables in a slow oven, up to 325Â°F, or a fast oven, with a temperature as high as 500Â°F. The oven temperature will depend on the type of vegetable, as some work best with long, slow cooking and others with quick, hot methods. Slow roasting works especially well with carrots or other root vegetables.