Spring is not only a time to get back in the garden with cool season crops, but depending on your gardening zone and the seasonal temperatures, it may be the only time to grow plants such as broccoli, cauliflower, and many lettuces before the arrival of peak summer heat. Some hearty plants, such as kale and Brussels sprouts, can even withstand an unexpected frost, but it’s best to be cautious. Some ways to extend the season include covering the soil with black plastic to warm it faster.
Planting in a raised bed can also provide a few days’ or weeks’ head start, as the ambient air temperature will raise the above-ground soil temperature faster than the ground temp. Unexpected frosts do occur, so consider having some season extenders on hand just in case. These can range from floating row covers to a milk jug with the bottom cut out to create a free version of the traditional glass bell jar garden cloche. Be sure to tie the milk jug handle to a stake or otherwise secure it from blowing away in spring winds. Take off the cap during the day to prevent overheating and cap at night for snuggly protection. And whatever barrier is chosen, keep the leaves from touching the cover, or else the plant could freeze.
