6 Vegetable Seeds Martha Starts Now for a Bountiful Summer Harvest These vegetables are staples in her garden. Close Credit: decorvow Although there is still a chill in the air and, in many parts of the country, snow on the ground, it's never too soon to start planning your summer vegetable garden. In fact, Martha and her head gardener, Ryan McCallister, have already started sowing seeds in her greenhouse to prepare for warmer weather. Starting seeds in winter allows you to get a jump on gardening season instead of waiting for the weather to warm up outside. By the time spring arrives, the seedlings have already grown sets of true leaves and can be planted in the ground. But what seeds are worth starting now? Ahead, we're sharing six vegetable seeds Martha starts in winter for a bountiful summer harvest. Take a Tour of Martha's Stunning Gardens—and Learn How She Created Each One 01 of 06 Broccoli Credit: Getty Images Martha and her family love Brassicas, such as broccoli, cauliflower, cabbage, and kale, so she grows these vegetables in abundance on her farm throughout summer. One of her favorites is broccoli, which she notes is high in fiber and vitamin C. The seeds are started in her greenhouse during winter until they're mature enough to be moved to her vegetable garden in spring. 02 of 06 Cauliflower Credit: Getty Images Another member of the Brassica family, Martha sows cauliflower seeds at the same time as broccoli. This low-growing plant looks very similar to cabbage until the large leaves open up and reveal the "curd," which Martha says is the most commonly consumed part of the vegetable. She recommends growing cauliflower plants in moist soil high in organic matter and daytime temperatures of 70 to 80 degrees Fahrenheit. In addition to the common white varieties, Martha also grows yellow-orange, purple, and green cauliflower. 03 of 06 Cabbage Credit: Getty Images Martha grows various types of cabbage on her farm, including Savoy, Napa, red, and green cabbage, starting the seeds in winter and transplanting them outside when the temperatures warm. She says to wait until the seedlings are 2 to 3 inches high and have two true leaves (leaves that form after the initial seed's cotyledon leaves appear) before transplanting. Don't Miss How to Grow Tomatoes From Seeds, According to Gardening Experts 7 Seeds to Start in February to Get a Head Start on Your Spring Garden 04 of 06 Celery Credit: YuriyS / Getty Images Celery is one of the main ingredients in Martha's daily green juice, as it's nutrient-rich with vitamins A, C, and K. She grows it year-round in her garden and vegetable greenhouse, in addition to leaf celery and celeriac, a globe vegetable that grows just beneath the surface of the soil. She starts all of these vegetables from seed indoors early for a head start on the growing season. 05 of 06 Onions Credit: Getty Images Starting onions from seed is a straightforward process that Martha typically begins after the new year. Since these are shallow-rooted plants, the seeds can be sown closely together and easily pulled apart when it's time for transplanting outdoors. These vegetables take about four months to mature, giving Martha a bounty of flavorful onions to enjoy and share come summer. Follow us to see more of our stories on Google. Follow Us On Google 06 of 06 Carrots Credit: Getty Images Carrots are another root vegetable that Martha starts in her greenhouse during winter. She likes to grow many varieties and colors, as some carrots are taste sweet, while others have an earthy or peppery flavor. Martha recommends planting the seeds two times as deep as the seed's diameter, spacing each seed about 2 inches apart. Explore more: Garden Vegetable Garden Ideas