Cool season vegetable gardens

Late March is a great time to start planting cool season vegetables. Many of the hardy types can be transplanted into the garden 2-4 weeks before the last frost (average of May 15). Cool season crops prefer cool daytime temperatures of 60 to 80 degrees, and down to 40 degrees at night.

The most hardy, such as broccoli, cabbage, kohlrabi, onions, lettuce, peas, radish, spinach and turnips, can withstand a frost.

Semi-Hardy vegetables such as beets, carrots, cauliflower, parsley, parsnips, potatoes and Swiss chard  are less tolerant of a frost, and may need some protection.

A good rule of thumb is you can plant pea seeds, potatoes and onions (all available in our Garden Shop) directly in the garden after St. Patrick’s Day. Using mulch, Season Extenders and covering with row covers will also help protect veggies from low temperatures.

Cool-season crops will stop producing when temperatures are high in the summertime, but keep in mind you can plant them again for another round of crops for a fall harvest!

Colorado State University Cooperative Extension offers a great vegetable planting guide and vegetable garden hints.