Start seeds in a sunny windowsill or under grow lights.
Here are some tricks to take advantage of sunny windowsills:
- Start Seeds Indoors: By the time the soil is warm enough to plant seeds outdoors, you’ve already missed some growing time. By starting seed flats in a sunny window, you can have seedlings ready to transplant by the time the weather warms up.
- Indoor Containers: Herbs and salad greens are easy to grow indoors in the winter, and you can simply snip off leaves as you need them. Indoor hydroponic systems go a step further to provide a sophisticated growing system for year-round vegetable harvests.
Greenhouses can provide year-round gardening.
If you’re dead-set on gardening year-round, and you live in areas with freezing winters, you’ll have to create an artificially heated environment for tender plants. A greenhouse is a great way to extend the gardening season, with several choices:
- Unheated Greenhouse: Made of insulating glass or plastic, unheated greenhouses function like a large cold frame, giving only frost protection and few weeks’ head start.
- Cool Greenhouse: Are minimally heated to keep temperatures above 40° F, allowing you to grow cool-season vegetables all winter long and to get a couple months’ head start on warm-season vegetables.
- Warm Greenhouse: Hothouses keep temperatures above 50° F, allowing ambitious gardeners to grow summer veggies and herbs even in the dead of winter.