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Zone 6A — March

What to Plant in March in Zone 6A

March in Zone 6A: 230 crops to start indoors, 2 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
230 Start Indoors
2 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
All Season Cabbage brassica Mar 11 Apr 15 Jun 24 – Jul 4
All Year Round Cauliflower brassica Mar 11 Apr 15 Jun 19
Brunswick Cabbage brassica Mar 11 Apr 15 Jul 14
Calabrese Broccoli brassica Mar 11 Apr 15 Jun 19
Catmint herb Mar 11 Apr 29 Perennial — see plant page
Charleston Wakefield Cabbage brassica Mar 4 Apr 8 Jun 17
Copenhagen Cabbage brassica Mar 11 Apr 15 Jun 19
Crackerjack Mix Marigolds flower Mar 25 Apr 29 Jun 28 – Jul 13
Crimson Forest Bunching Onions allium Mar 11 Apr 29 Jun 28
Danish Ballhead Cabbage brassica Mar 11 Apr 15 Jul 24 – Aug 3
Di Cicco Broccoli brassica Mar 11 Apr 15 May 30 – Jun 2
Drumhead Cabbage brassica Mar 11 Apr 15 Jul 14 – Jul 24
Early Jersey Wakefield Cabbage brassica Mar 4 Apr 8 Jun 12 – Jun 22
Early Purple Broccoli brassica Mar 11 Apr 15 Jun 19
Evergreen Bunching Onions allium Mar 11 Apr 29 Jun 28 – Jul 3
Glory of Enkhuizen Cabbage brassica Mar 11 Apr 15 Jul 14
Golden Acre Cabbage brassica Mar 11 Apr 15 Jun 19
Igloo Cauliflower brassica Mar 11 Apr 15 Jun 19 – Jun 24
Italian Oregano herb Mar 11 Apr 29 Perennial — see plant page
Michihili Cabbage brassica Mar 4 Apr 8 Jun 17
Red Acre Cabbage brassica Mar 4 Apr 8 Jun 22 – Jun 27
Roman Chamomile herb Mar 11 Apr 29 Perennial — see plant page
Rue herb Mar 11 Apr 29 Perennial — see plant page
Savoy Perfection Cabbage brassica Mar 11 Apr 15 Jul 14 – Jul 19
Snowball Self-Blanche Cauliflower brassica Mar 11 Apr 15 Jun 19
Sparky Mix Marigolds flower Mar 25 Apr 29 Jun 23 – Jul 8
Sweet Woodruff herb Mar 11 Apr 29 Perennial — see plant page
Tansy herb Mar 11 Apr 29 Perennial — see plant page
Violetta Purple Cauliflower brassica Mar 11 Apr 15 Jun 19
White Lisbon Bunching Onions allium Mar 11 Apr 29 Jun 28
Wormwood herb Mar 11 Apr 29 Perennial — see plant page
Abe Lincoln Tomatoes tomato Mar 25 May 13 Aug 1 – Aug 11
Ace 55 Tomatoes tomato Mar 25 May 13 Aug 1 – Aug 6
Aji Amarillo Peppers pepper Mar 11 May 13 Aug 11 – Sep 10
Aji Dulce Peppers pepper Mar 11 May 13 Aug 11 – Aug 31
Amish Paste Tomatoes tomato Mar 25 May 13 Jul 26 – Aug 6
Anaheim Peppers pepper Mar 11 May 13 Jul 29 – Aug 6
Ancho Grande Hot Peppers pepper Mar 11 May 13 Jul 27 – Aug 6
Anna Russian Tomatoes tomato Mar 25 May 13 Jul 22
Atkinson Tomatoes tomato Mar 25 May 13 Jul 22 – Aug 1
Aunt Molly's Ground Cherry vegetable Mar 25 May 13 Jul 22 – Aug 11
Aunt Ruby's German Green Tomatoes tomato Mar 25 May 13 Aug 1
Banana Peppers pepper Mar 18 May 20 Jul 31
Beefsteak Tomatoes tomato Mar 11 May 13 Aug 1 – Aug 6
Better Boy Tomatoes tomato Mar 25 May 13 Jul 22 – Jul 27
Bhut Jolokia Ghost Pepper pepper Mar 4 May 13 Aug 11 – Sep 10
Big Beef Tomatoes tomato Mar 25 May 13 Jul 22
Big Bertha Peppers pepper Mar 18 May 20 Jul 29 – Aug 1
Big Boy Tomatoes tomato Mar 25 May 13 Jul 30
Big Jim Hatch Chile pepper Mar 4 May 13 Jul 22 – Jul 27
Big Rainbow Tomatoes tomato Mar 25 May 13 Aug 6 – Aug 16
Birds Eye Hot Peppers pepper Mar 11 May 13 Aug 21 – Aug 31
Black Beauty Eggplant vegetable Mar 4 May 13 Jul 27 – Aug 11
Black Cherry Tomatoes tomato Mar 25 May 13 Jul 16 – Jul 27
Black From Tula Tomatoes tomato Mar 25 May 13 Aug 6
Black Krim Tomatoes tomato Mar 25 May 13 Jul 27 – Aug 1
Black Pearl Tomatoes tomato Mar 25 May 13 Jul 17
Blondkopfchen Tomatoes tomato Mar 25 May 13 Jul 27 – Aug 1
Bonny Best Tomatoes tomato Mar 25 May 13 Jul 27 – Aug 1
Bradley Tomatoes tomato Mar 25 May 13 Jul 27 – Aug 1
Brandywine Tomatoes tomato Mar 11 May 13 Aug 1 – Aug 11
Calendula flower Mar 25 May 13 Jul 2 – Jul 12
California Wonder Peppers pepper Mar 18 May 20 Jul 31 – Aug 3
Calypso Tomatoes tomato Mar 25 May 13 Jul 27 – Aug 1
Cardoon (Purple Artichoke Thistle) vegetable Mar 4 May 6 Perennial — see plant page
Caribe Tomatoes tomato Mar 25 May 13 Jul 27 – Aug 6
Carmello Tomatoes tomato Mar 25 May 13 Jul 22 – Jul 27
Carmen Peppers pepper Mar 18 May 20 Jul 19 – Aug 8
Casper Eggplant vegetable Mar 11 May 13 Jul 27
Cayenne Peppers pepper Mar 11 May 13 Jul 22 – Aug 6
Celebrity Tomatoes tomato Mar 25 May 13 Jul 22 – Jul 24
Chadwick's Cherry Tomatoes tomato Mar 25 May 13 Jul 22 – Aug 11
Cherokee Purple Tomatoes tomato Mar 11 May 13 Jul 30 – Aug 6
Chinese 5-Color Peppers pepper Mar 11 May 13 Jul 27 – Aug 6
Chocolate Bell Sweet Peppers pepper Mar 11 May 13 Jul 17 – Aug 1
Chocolate Cherry Tomatoes tomato Mar 25 May 13 Jul 22 – Jul 27
Chocolate Habanero Hot Peppers pepper Mar 11 May 13 Aug 6 – Aug 26
Chocolate Stripes Tomatoes tomato Mar 25 May 13 Aug 1
Common Sage herb Mar 18 May 6 Perennial — see plant page
Corno di Toro Pepper pepper Mar 4 May 13 Jul 27 – Aug 1
Costoluto Genovese Tomatoes tomato Mar 25 May 13 Jul 22 – Aug 1
Crego Mix Aster Flowers flower Mar 18 May 6 Jul 25 – Aug 4
Creole Tomatoes tomato Mar 25 May 13 Jul 22 – Jul 30
Cubanelle Peppers pepper Mar 18 May 20 Jul 21 – Jul 29
Culinary Turmeric root vegetable Mar 25 May 20 Jan 15, 2027 – Mar 16, 2027
Cupid Grape Tomatoes tomato Mar 25 May 13 Jul 17 – Jul 22
Dark Opal Basil herb Mar 25 May 13 Jul 12 – Jul 27
Delicious Tomatoes tomato Mar 25 May 13 Jul 27 – Aug 1
Devils Tongue Yellow Hot Peppers pepper Mar 11 May 13 Aug 11 – Aug 31
Dolce Fresca Basil herb Mar 25 May 13 Jul 12 – Jul 22
Early Girl Tomatoes tomato Mar 25 May 13 Jul 4 – Jul 14
Egg Tomatoes tomato Mar 25 May 13 Jul 27 – Aug 1
Emerald Giant Sweet Peppers pepper Mar 11 May 13 Jul 27 – Aug 6
English Lavender herb Mar 11 May 13 Perennial — see plant page
Firecracker Hot Peppers pepper Mar 11 May 13 Aug 1 – Sep 10
Fish Peppers pepper Mar 11 May 13 Jul 22 – Aug 1
Five Star Grape Tomatoes tomato Mar 25 May 13 Jul 14
Floradade Tomatoes tomato Mar 25 May 13 Jul 22 – Jul 27
Florida Market Eggplant vegetable Mar 11 May 13 Aug 1 – Aug 11
Fresno Peppers pepper Mar 11 May 13 Jul 27 – Aug 1
Gardener's Delight Tomatoes tomato Mar 25 May 13 Jul 12 – Jul 27
Genovese Basil herb Mar 25 May 13 Jul 12 – Jul 22
German Johnson Tomatoes tomato Mar 25 May 13 Aug 6
Ginger root vegetable Mar 25 May 20 Jan 15, 2027 – Mar 16, 2027
Glacier Tomatoes tomato Mar 25 May 13 Jul 7 – Jul 10
Gochugaru Korean Peppers pepper Mar 11 May 13 Jul 27
Golden Marconi Sweet Peppers pepper Mar 11 May 13 Jul 17 – Aug 1
Golden Sunray Tomatoes tomato Mar 25 May 13 Jul 27 – Aug 1
Green Envy Tomatoes tomato Mar 25 May 13 Jul 12 – Jul 22
Green Globe Artichoke vegetable Mar 4 May 13 Perennial — see plant page
Green Grape Tomatoes tomato Mar 25 May 13 Jul 17 – Jul 30
Green Zebra Tomatoes tomato Mar 25 May 13 Jul 27 – Jul 30
Gypsy Peppers pepper Mar 18 May 20 Jul 19 – Jul 24
Habanero Pepper pepper Mar 4 May 20 Aug 18 – Sep 17
Hatch Green Chile (NM 6-4) Peppers pepper Mar 11 May 13 Jul 22 – Aug 1
Highbush Blueberries berry Mar 4 May 13 Perennial — see plant page
Hillbilly Tomatoes tomato Mar 25 May 13 Aug 6
Holiday Marbles Hot Peppers pepper Mar 11 May 13 Aug 11 – Aug 31
Homestead Tomatoes tomato Mar 25 May 13 Aug 1 – Aug 6
Honey Bee Tomatoes tomato Mar 25 May 13 Jul 12
Hungarian Hot Wax Pepper pepper Mar 4 May 13 Jul 17 – Jul 27
Indigo Rose Tomatoes tomato Mar 25 May 13 Jul 27 – Aug 11
Isis Candy Cherry Tomatoes tomato Mar 18 May 6 Jul 15 – Jul 25
Jalapeño Peppers pepper Mar 11 May 13 Jul 17 – Jul 27
Japanese Eggplant vegetable Mar 18 May 13 Jul 2 – Jul 17
Jaune Flamme Tomatoes tomato Mar 25 May 13 Aug 1
Jet Star Tomatoes tomato Mar 25 May 13 Jul 22 – Jul 24
Jimmy Nardello Peppers pepper Mar 18 May 20 Aug 8 – Aug 18
Jubilee Tomatoes tomato Mar 25 May 13 Jul 27 – Aug 1
Juliet Tomatoes tomato Mar 25 May 13 Jul 11 – Jul 13
Kapoor Tulsi (Holy Basil) herb Mar 25 May 13 Jul 12
Kellogg's Breakfast tomatoes tomato Mar 18 May 6 Jul 20 – Jul 30
King Arthur Peppers pepper Mar 18 May 20 Jul 18
Large Red Cherry Tomatoes tomato Mar 25 May 13 Jul 22 – Aug 1
Lemon Habanero Hot Peppers pepper Mar 11 May 13 Aug 6 – Aug 26
Lemongrass herb Mar 11 May 13 Perennial — see plant page
Long Green Louisiana Eggplant vegetable Mar 11 May 13 Jul 17 – Jul 22
Long Ping Tung Eggplant vegetable Mar 11 May 13 Jul 7 – Jul 12
Long Purple Italian Eggplant vegetable Mar 11 May 13 Jul 27
Lunchbox Mini Peppers pepper Mar 18 May 20 Jul 14 – Jul 19
Manitoba Tomatoes tomato Mar 25 May 13 Jul 18
Marglobe Improved Tomatoes tomato Mar 25 May 13 Jul 22 – Aug 1
Marglobe Supreme Tomatoes tomato Mar 25 May 13 Jul 22 – Aug 1
Mariachi Peppers pepper Mar 11 May 13 Jul 18 – Jul 27
Marion Tomatoes tomato Mar 25 May 13 Jul 27 – Aug 1
Matt's Wild Cherry Tomatoes tomato Mar 18 May 6 Jun 30 – Jul 10
Midnight Snack Tomatoes tomato Mar 25 May 13 Jul 17 – Jul 22
Money Maker Tomatoes tomato Mar 25 May 13 Jul 27 – Aug 6
Mortgage Lifter Tomatoes tomato Mar 11 May 13 Aug 1 – Aug 6
Mountain Magic Tomatoes tomato Mar 25 May 13 Jul 24 – Jul 27
Mr. Stripey Tomatoes tomato Mar 25 May 13 Aug 1
Mrs. Burns Lemon Basil herb Mar 18 May 6 Jul 5 – Jul 15
Mucho Nacho Jalapeño Peppers pepper Mar 25 May 13 Jul 20 – Jul 22
Napoletano Basil herb Mar 25 May 13 Jul 27
NuMex Twilight Hot Peppers pepper Mar 11 May 13 Aug 11 – Sep 10
Orange Habanero Hot Peppers pepper Mar 11 May 13 Aug 6 – Aug 26
Orange Horizon Sweet Peppers pepper Mar 11 May 13 Jul 27 – Aug 1
Orange Oxheart Tomatoes tomato Mar 25 May 13 Jul 27 – Aug 6
Oregon Spring Tomatoes tomato Mar 25 May 13 Jul 10 – Jul 22
Padron Peppers pepper Mar 18 May 20 Jul 19
Pandora Striped Eggplant vegetable Mar 11 May 13 Jul 27 – Aug 1
Pasilla de Oaxaca Hot Peppers pepper Mar 11 May 13 Jul 27 – Aug 6
Patio Princess Tomatoes tomato Mar 25 May 13 Jul 17 – Jul 22
Paul Robeson tomatoes tomato Mar 18 May 6 Jul 15 – Jul 30
Pepperoncini Pepper pepper Mar 11 May 13 Jul 17 – Jul 27
Pesto Perpetuo Basil herb Mar 25 May 13 Jul 12 – Aug 11
Pimento Sweet Peppers pepper Mar 11 May 13 Aug 6 – Aug 11
Pineapple Tomatillos vegetable Mar 18 May 6 Jul 15 – Jul 25
Pineapple Tomatoes tomato Mar 25 May 13 Jul 27 – Aug 6
Pink Delicious Tomatoes tomato Mar 25 May 13 Aug 1 – Aug 5
Pink Oxheart Tomatoes tomato Mar 25 May 13 Aug 1 – Aug 11
Pistou Basil herb Mar 25 May 13 Jul 12
Poblano Peppers pepper Mar 11 May 13 Jul 17
Ponderosa Red Beefsteak Tomatoes tomato Mar 25 May 13 Aug 1 – Aug 11
Powderpuff Aster Flowers flower Mar 18 May 6 Jul 20 – Jul 30
Pretty Purple Hot Peppers pepper Mar 11 May 13 Aug 11 – Sep 10
Purple Basil herb Mar 25 May 13 Jul 22 – Aug 6
Purple Beauty Sweet Peppers pepper Mar 11 May 13 Jul 22 – Jul 27
Purple Tiger Hot Peppers pepper Mar 11 May 13 Aug 11 – Aug 21
Red Caribbean Habanero Hot Peppers pepper Mar 11 May 13 Aug 6 – Aug 26
Red Cayenne Hot Peppers pepper Mar 11 May 13 Jul 27 – Aug 6
Red Cherry Hot Peppers pepper Mar 11 May 13 Jul 27 – Aug 1
Red Mushroom Hot Peppers pepper Mar 11 May 13 Jul 27 – Aug 6
Red Pear Tomatoes tomato Mar 25 May 13 Jul 17 – Jul 27
Red Robin Tomatoes tomato Mar 25 May 13 Jul 7
Red Rubin Basil herb Mar 25 May 13 Jul 24
Red Scotch Bonnet Pepper pepper Mar 4 May 13 Aug 16 – Sep 10
Rio Grande Tomatoes tomato Mar 25 May 13 Jul 27 – Aug 1
Roma VF Tomatoes tomato Mar 25 May 13 Jul 27 – Aug 1
Round Mauve Eggplant vegetable Mar 11 May 13 Aug 1 – Aug 11
Rutgers Tomato tomato Mar 25 May 13 Jul 22 – Aug 1
Sakura Tomatoes tomato Mar 25 May 13 Jul 7 – Jul 12
San Marzano Tomatoes tomato Mar 11 May 13 Jul 30 – Aug 9
Santa Fe Grande Hot Peppers pepper Mar 11 May 13 Jul 27 – Aug 1
Serrano Peppers pepper Mar 11 May 13 Jul 22 – Aug 1
Shishito Peppers pepper Mar 18 May 20 Jul 19 – Jul 24
Single Mix China Aster Flowers flower Mar 18 May 6 Jul 15 – Jul 25
Soapwort flower Mar 18 May 6 Perennial — see plant page
Spicy Globe Basil herb Mar 25 May 13 Jul 22
Stevia herb Mar 25 May 13 Perennial — see plant page
Stupice Tomatoes tomato Mar 25 May 13 Jul 7 – Jul 22
Sun Gold Tomatoes tomato Mar 25 May 13 Jul 9 – Jul 17
Sunbright Yellow Sweet Peppers pepper Mar 11 May 13 Jul 27 – Aug 1
SunChocola Tomatoes tomato Mar 25 May 13 Jul 12 – Jul 22
Sungella Tomatoes tomato Mar 25 May 13 Jul 12 – Jul 22
Sunray Tomatoes tomato Mar 25 May 13 Jul 27 – Aug 1
Sweet 100 Tomatoes tomato Mar 25 May 13 Jul 12 – Jul 17
Sweet Alyssum flower Mar 25 May 13 Jun 22 – Jul 7
Sweet Marjoram herb Mar 18 May 6 Jul 20 – Aug 4
Sweet Million Tomatoes tomato Mar 25 May 13 Jul 12 – Jul 17
Sweet Treats Tomatoes tomato Mar 25 May 13 Jul 17 – Jul 27
Tabasco Hot Peppers pepper Mar 11 May 13 Aug 1 – Aug 11
Thai Basil herb Mar 25 May 13 Jul 12 – Jul 17
Thai Hot Peppers pepper Mar 11 May 13 Jul 27 – Aug 6
Thessaloniki Tomatoes tomato Mar 25 May 13 Jul 13 – Jul 24
Tigerella Tomatoes tomato Mar 25 May 13 Jul 7 – Jul 22
Tiny Tim Tomatoes tomato Mar 25 May 13 Jun 27 – Jul 7
Tropical Milkweed Flowers flower Mar 18 May 6 Perennial — see plant page
Tumbling Tom Red Tomatoes tomato Mar 25 May 13 Jul 17 – Jul 22
Turkish Orange Eggplant vegetable Mar 11 May 13 Aug 6 – Aug 11
VR Moscow Tomatoes tomato Mar 25 May 13 Aug 1 – Aug 11
White Cherry Tomatoes tomato Mar 25 May 13 Jul 11 – Jul 22
White Cloud Sweet Peppers pepper Mar 11 May 13 Jul 22 – Jul 27
Yellow Beefsteak Tomatoes tomato Mar 25 May 13 Jul 27 – Aug 6
Yellow Jalapeno (Caloro) Hot Peppers pepper Mar 11 May 13 Jul 27 – Aug 6
Yellow Mushroom Hot Peppers pepper Mar 11 May 13 Jul 27 – Aug 6
Yellow Oxheart Tomatoes tomato Mar 25 May 13 Jul 31
Yellow Pear Tomatoes tomato Mar 25 May 13 Jul 22 – Aug 1
Yellow Scotch Bonnet Hot Peppers pepper Mar 11 May 13 Aug 11 – Sep 10
Yolo Wonder Sweet Peppers pepper Mar 11 May 13 Jul 22 – Aug 1

Plant Outside in March

Plant Type Action Target Date Harvest Window
Candy Onion allium Plant Out Mar 25 Jun 23 – Jul 3
Green Onion allium Transplant Mar 25 Perennial — see plant page

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 230 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 Harden off transplants before moving outdoors — set them outside in a sheltered spot for increasing hours over 7–10 days before planting in the ground.
  3. 3 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
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