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Zone 6A — March

What to Plant in March in Zone 6A

March in Zone 6A: 20 crops to start indoors, 0 to plant or direct sow outside, and 0 entering harvest window. Last frost averages April 29. Reference city: Columbus, OH.
Updated May 13, 2026 · Frost data from NOAA 1991-2020 Climate Normals
20 Start Indoors
0 Plant Outside
0 Harvest
Frost risk: High

Frost risk is still high in Zone 6A. The last spring frost typically lands on April 29, with the earliest plausible clearance around April 15. Hold tender crops indoors a while longer.

See full Zone 6A frost outlook →

Start Indoors in March

Plant Type Start Indoors Transplant Outside Harvest Window
Black Salsify root vegetable Mar 25 Apr 1 Perennial — see plant page
Brilliant Celeriac root vegetable Mar 18 Apr 29 Aug 17 – Aug 27
Carentan Leeks allium Mar 25 Apr 15 Jul 14 – Aug 3
Charleston Wakefield Cabbage brassica Mar 25 Apr 8 Jun 22
Crimson Cherry Rhubarb Root vegetable Mar 25 Apr 1 Perennial — see plant page
Curly Parsley herb Mar 25 Apr 29 Jul 8 – Jul 18
Dutch Yellow Shallots allium Mar 25 Apr 1 Jun 30 – Jul 30
Early Jersey Wakefield Cabbage brassica Mar 25 Apr 8 Jun 12 – Jun 22
Flat-Leaf Parsley herb Mar 25 Apr 29 Jul 8 – Jul 28
French Red Shallots allium Mar 25 Apr 1 Jun 30 – Jul 30
Giant Musselburgh Leeks allium Mar 25 Apr 15 Jul 24 – Jul 29
Holland Red Shallots allium Mar 25 Apr 1 Jun 30 – Jul 30
Imperial Star Artichoke vegetable Mar 25 Apr 29 Jul 28 – Aug 7
Michihili Cabbage brassica Mar 25 Apr 8 Jun 17
OG American Flag Leeks allium Mar 25 Apr 15 Jul 14 – Jul 24
Red Acre Cabbage brassica Mar 25 Apr 8 Jun 22 – Jun 27
Shasta Daisy Flowers flower Mar 25 Apr 29 Perennial — see plant page
Victoria Rhubarb vegetable Mar 25 Apr 15 Perennial — see plant page
Viola and pansy edible flowers flower Mar 11 Apr 15 Jun 14 – Jun 24
Alexandria Alpine Strawberry berry Mar 25 May 6 Perennial — see plant page

Plant Outside in March

Nothing to plant or sow outside in March for Zone 6A.
Next window: April — 318 varieties, including African Flake Daisy Flowers, Alaska Early Pea, Alaska Mix Nasturtium Flowers.

Harvest in March

Nothing to harvest in March for Zone 6A.
Next window: April — 3 varieties, including Astro Arugula, Mesclun Mix, Tatsoi.

Key Tasks for March in Zone 6A

  1. 1 Start 20 varieties indoors this month under grow lights or in a sunny south-facing window. Use a seed-starting mix and bottom heat (70–75°F) for best germination rates.
  2. 2 Check soil moisture before watering — stick a finger 2 inches into the soil. Water only when the soil is dry at that depth. Consistent moisture is more important than frequency.
Back to full Zone 6A planting calendar
February March in Zone 6A April

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