15 vegetables you can plant directly outside in early march

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14. Parsnips: Slow Starters That Need an Early March Sow
Parsnips are a slow-germinating root crop that benefits from early March planting. Sow seeds 1/2 inch deep and 3 inches apart in rows spaced 12 inches apart. Parsnips require a long growing season, typically taking 120 to 180 days to mature. They are best harvested after a frost, which enhances their sweet flavor.
15. Spring Onions (Scallions): Slim Alliums for Succession Planting
Spring onions, or scallions, are versatile alliums that can be planted directly into the garden in early March. Sow seeds 1/4 inch deep and 1 inch apart in rows spaced 12 inches apart. They prefer cool conditions and will germinate in temperatures as low as 50°F (10°C). For a continuous supply, plant seeds every two weeks.