February is the month that tests a gardener’s patience. The seed trays come out, the grow lights hum to life, and it feels like you should be starting everything for the summer garden right now.
However, for many USDA Plant Hardiness Zones, there are still more than 12 weeks remaining until the last frost date. As a Master Gardener in Colorado, I’ve found that it’s best to plant with patience and intention in February to avoid overgrown chaos come spring.
Why You Should Start Seeds in February
February is ideal for starting long-season crops. Long-season crops are plants that need several months to mature and benefit from a head start, especially in cooler regions with shorter growing seasons.
Based on experience and science, I’ve hand-picked the following crops that I plan to start in February:
Peppers
Bell, jalapeño, and hot peppers are my top February seeds. They germinate slowly, sometimes taking three to four weeks, and need a long growing season to produce. I’ve found that a heat mat can make a huge difference here, improving the consistency of germination and overall growth.
The University of Minnesota Extension recommends starting pepper seeds about eight weeks before your outdoor planting date, noting that peppers often need an earlier indoor start than tomatoes to mature in cooler climates.
Eggplant
Eggplant earns its spot in my February lineup because it behaves a lot like peppers: slow to germinate, slow to grow, and very appreciative of the extra time indoors. In Zone 6, starting eggplant in February (6-8 weeks before your last frost date) gives plants enough time to size up before warm weather finally settles in.
Eggplant needs consistent warmth, strong grow lights, and patience. Like peppers, I’ve found that heat mats also help tremendously, but be cautious – eggplant can outgrow its indoor space quickly if conditions are too cozy.
Onions (from seed)
Onions are one of those crops that really benefit from an early start, but not in the way most people think. Rather than tossing out sets or bulbs in early spring, starting onions from seed in February gives them months to develop a strong root and leaf system before transplanting outdoors.
North Carolina Cooperative Extension notes that onions started early indoors develop better size and structure, especially in climates with a shorter cool-season growing window, like Zone 6. They recommend sowing onion seeds 8–10 weeks before your expected transplant date.
Leeks
Similar to onions from seed, leeks are another cool-season crop that benefits from additional growing time indoors. Leeks grow at a glacial pace, taking 120-150 days from transplant to maturity according to the University of Minnesota Extension. Starting leeks now means solid, sturdy transplants when you’re ready to head out to the garden.
Celery
Celery earns its spot on my February seed list because it truly needs the longest runway of almost any vegetable. It’s a cool-season crop requiring 100–130+ days to reach harvest, so starting seeds indoors about 10–12 weeks before your last frost is essential in a Zone 6 climate, according to Utah State University Extension.
