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Zone 6B — March

What to Plant in March in Zone 6B

March in Zone 6B: 52 crops to start indoors, 93 to plant or direct sow outside, and 0 entering harvest window. Last frost averages April 23. Reference city: Richmond, VA.
Updated May 13, 2026 · Frost data from NOAA 1991-2020 Climate Normals
52 Start Indoors
93 Plant Outside
0 Harvest
Frost risk: High

Frost risk is still high in Zone 6B. The last spring frost typically lands on April 23, with the earliest plausible clearance around April 9. Hold tender crops indoors a while longer.

See full Zone 6B frost outlook →

Start Indoors in March

Plant Type Start Indoors Transplant Outside Harvest Window
Crimson Cherry Rhubarb Root vegetable Mar 19 Mar 26 Perennial — see plant page
Dutch Yellow Shallots allium Mar 19 Mar 26 Jun 24 – Jul 24
French Red Shallots allium Mar 19 Mar 26 Jun 24 – Jul 24
Holland Red Shallots allium Mar 19 Mar 26 Jun 24 – Jul 24
Alexandria Alpine Strawberry berry Mar 19 Apr 30 Perennial — see plant page
All Season Cabbage brassica Mar 26 Apr 9 Jun 18 – Jun 28
All Year Round Cauliflower brassica Mar 26 Apr 9 Jun 13
Angelica herb Mar 26 Apr 23 Jul 12 – Jul 22
Barletta, Pearly White Onions root vegetable Mar 26 Apr 23 Jul 7 – Jul 12
Brilliant Celeriac root vegetable Mar 12 Apr 23 Aug 11 – Aug 21
Brunswick Cabbage brassica Mar 26 Apr 9 Jun 28 – Jul 8
Calabrese Broccoli brassica Mar 26 Apr 9 Jun 13
Carentan Leeks allium Mar 19 Apr 9 Jul 8 – Jul 28
Charleston Wakefield Cabbage brassica Mar 19 Apr 2 Jun 16
Copenhagen Cabbage brassica Mar 26 Apr 9 Jun 13
Curly Parsley herb Mar 19 Apr 23 Jul 2 – Jul 12
Danish Ballhead Cabbage brassica Mar 26 Apr 9 Jul 18 – Jul 28
Di Cicco Broccoli brassica Mar 26 Apr 9 Jun 13
Drumhead Cabbage brassica Mar 26 Apr 9 Jul 8 – Jul 18
Early Jersey Wakefield Cabbage brassica Mar 19 Apr 2 Jun 6 – Jun 16
Early Purple Broccoli brassica Mar 26 Apr 9 Jun 13
English Thyme herb Mar 26 Apr 23 Perennial — see plant page
English White Daisy Flowers flower Mar 26 Apr 23 Perennial — see plant page
Flat-Leaf Parsley herb Mar 19 Apr 23 Jul 2 – Jul 22
Giant Maximum Mix Snapdragon Flowers flower Mar 26 Apr 23 Jul 12 – Jul 27
Giant Musselburgh Leeks allium Mar 19 Apr 9 Jul 18 – Jul 23
Glory of Enkhuizen Cabbage brassica Mar 26 Apr 9 Jul 8
Golden Acre Cabbage brassica Mar 26 Apr 9 Jun 13
Golden Celery vegetable Mar 26 Apr 30 Jul 24 – Aug 3
Grano Red Onions root vegetable Mar 26 Apr 23 Aug 21
Grano White Onions root vegetable Mar 26 Apr 23 Aug 21
Igloo Cauliflower brassica Mar 26 Apr 9 Jun 13 – Jun 18
Imperial Star Artichoke vegetable Mar 19 Apr 23 Jul 22 – Aug 1
Michihili Cabbage brassica Mar 19 Apr 2 Jun 11
OG American Flag Leeks allium Mar 19 Apr 9 Jul 8 – Jul 18
Ox-Eye Daisy Flowers flower Mar 26 Apr 23 Perennial — see plant page
Red Acre Cabbage brassica Mar 19 Apr 2 Jun 16 – Jun 21
Red Burgundy Onions root vegetable Mar 26 Apr 23 Aug 11 – Aug 21
Savoy Perfection Cabbage brassica Mar 26 Apr 9 Jul 8 – Jul 13
Shasta Daisy Flowers flower Mar 19 Apr 23 Perennial — see plant page
Snowball Self-Blanche Cauliflower brassica Mar 26 Apr 9 Jun 13
Southport Red Globe Onions root vegetable Mar 26 Apr 23 Aug 21
Southport White Globe Onions root vegetable Mar 26 Apr 23 Aug 21
Spanish Sweet White Onions root vegetable Mar 26 Apr 23 Aug 11 – Aug 21
Tendercrisp Celery vegetable Mar 26 Apr 30 Jul 24 – Aug 8
Victoria Rhubarb vegetable Mar 19 Apr 9 Perennial — see plant page
Viola and pansy edible flowers flower Mar 5 Apr 9 Jun 8 – Jun 18
Violetta Purple Cauliflower brassica Mar 26 Apr 9 Jun 13
Carolina Reaper peppers pepper Mar 26 May 7 Aug 5 – Sep 4
Cherry Bomb peppers pepper Mar 26 May 7 Jul 21 – Jul 26
Datil peppers pepper Mar 26 May 7 Aug 5 – Aug 25
Trinidad Moruga Scorpion peppers pepper Mar 26 May 7 Jul 26 – Sep 4

Plant Outside in March

Plant Type Action Target Date Harvest Window
All Year Round Lettuce lettuce Direct Sow Mar 21 May 24 – Jun 2
America Spinach lettuce Direct Sow Mar 21 May 3 – May 15
Astro Arugula lettuce Direct Sow Mar 21 Apr 11 – Apr 30
Black Seeded Simpson Lettuce lettuce Direct Sow Mar 21 May 5 – May 6
Blonde de Paris Lettuce lettuce Direct Sow Mar 21 May 10 – May 20
Bloomsdale Longstanding Spinach lettuce Direct Sow Mar 21 May 5 – May 12
Blue Curled Scotch Kale lettuce Direct Sow Mar 21 May 15 – May 20
Bok Choy lettuce Direct Sow Mar 21 May 5 – May 20
Broadleaf Classic Endive lettuce Direct Sow Mar 21 May 10 – May 20
Broadleaf Full Heart Batavian Endive lettuce Direct Sow Mar 21 Jun 14 – Jun 19
Broadleaf Sorrel lettuce Direct Sow Mar 21 Perennial — see plant page
Burgundy Boston Lettuce lettuce Direct Sow Mar 21 May 10 – May 15
Buttercrunch Lettuce lettuce Direct Sow Mar 21 May 6 – May 15
Butterhead Lettuce lettuce Direct Sow Mar 21 May 10 – May 25
Canary Yellow Swiss Chard lettuce Direct Sow Mar 21 May 10 – May 20
Catalogna Chicory lettuce Direct Sow Mar 21 May 15
Chinese Broccoli (Gai Lan) brassica Direct Sow Mar 21 Apr 20 – May 10
Crimson Cherry Rhubarb Root vegetable Transplant Mar 26 Perennial — see plant page
Crisphead Lettuce lettuce Direct Sow Mar 21 May 28 – Jun 4
Curly Kale lettuce Direct Sow Mar 21 May 15 – May 25
Dark Green Romaine Lettuce lettuce Direct Sow Mar 21 May 20 – May 30
Delicatesse Blue Kohlrabi brassica Direct Sow Mar 21 May 15 – May 20
Delicatesse White Kohlrabi brassica Direct Sow Mar 21 May 15 – May 20
Dutch Lamb's Lettuce lettuce Direct Sow Mar 21 Apr 30 – May 10
Dutch Yellow Shallots allium Transplant Mar 26 Jun 24 – Jul 24
Dwarf Siberian Kale lettuce Direct Sow Mar 21 May 10 – May 15
Endive / Escarole lettuce Direct Sow Mar 21 May 5 – May 25
Florida Broadleaf Mustard lettuce Direct Sow Mar 21 Apr 30 – May 10
Fordhook Giant Swiss Chard lettuce Direct Sow Mar 21 May 5 – May 15
French Lamb's Lettuce lettuce Direct Sow Mar 21 Apr 30 – May 10
French Red Shallots allium Transplant Mar 26 Jun 24 – Jul 24
Georgia Southern Collard Greens lettuce Direct Sow Mar 21 May 20 – Jun 9
Giant Red Mustard lettuce Direct Sow Mar 21 May 5
Green Ice Lettuce lettuce Direct Sow Mar 21 May 5
Green Mountain Celtuce lettuce Direct Sow Mar 21 May 10
Green Wave Mustard lettuce Direct Sow Mar 21 May 5
Holland Red Shallots allium Transplant Mar 26 Jun 24 – Jul 24
Hot Pink Swiss Chard lettuce Direct Sow Mar 21 May 10 – May 20
Iceberg Lettuce lettuce Direct Sow Mar 21 May 28 – Jun 4
Kagraner Sommer Lettuce lettuce Direct Sow Mar 21 May 10 – May 18
Lacinato Kale lettuce Direct Sow Mar 21 May 20 – May 25
Large Leaf Sorrel lettuce Direct Sow Mar 21 Perennial — see plant page
Leaf Lettuce Mix lettuce Direct Sow Mar 21 May 5 – May 15
Little Gem Lettuce lettuce Direct Sow Mar 21 May 10 – May 16
Lollo Bionda Lettuce lettuce Direct Sow Mar 21 May 10 – May 20
Lollo Rossa Lettuce lettuce Direct Sow Mar 21 May 13 – May 16
Magenta Sunset Swiss Chard lettuce Direct Sow Mar 21 May 15 – May 20
Marvel of Four Seasons Lettuce lettuce Direct Sow Mar 21 May 5 – May 20
Matador Viking Spinach lettuce Direct Sow Mar 21 May 5 – May 8
Mesclun Mix lettuce Direct Sow Mar 21 Apr 11 – Apr 20
Mizuna lettuce Direct Sow Mar 21 Apr 30 – May 10
Monstrueux de Viroflay Spinach lettuce Direct Sow Mar 21 May 5 – May 10
Morris Heading Collard lettuce Direct Sow Mar 21 Jun 4 – Jun 9
Mustard Greens lettuce Direct Sow Mar 21 Apr 25 – May 10
Mâche (Corn Salad) lettuce Direct Sow Mar 21 May 20 – Jun 13
Napa Cabbage brassica Direct Sow Mar 21 May 30 – Jun 19
New Zealand Spinach lettuce Direct Sow Mar 21 May 10 – May 20
Noble Giant Spinach lettuce Direct Sow Mar 21 May 6 – May 10
Old Fashion Mustard lettuce Direct Sow Mar 21 May 5 – May 10
Orange Swiss Chard lettuce Direct Sow Mar 21 May 5 – May 15
Premier Kale lettuce Direct Sow Mar 21 May 10 – May 20
Radicchio lettuce Direct Sow Mar 21 May 20 – Jun 14
Rainbow Mix Swiss Chard lettuce Direct Sow Mar 21 May 10 – May 20
Rapini Broccoli Raab brassica Direct Sow Mar 21 May 25
Red Leaf Lettuce lettuce Direct Sow Mar 21 May 5 – May 15
Red Orach lettuce Direct Sow Mar 21 May 5
Red Romaine Lettuce lettuce Direct Sow Mar 21 May 20 – May 30
Red Russian Kale lettuce Direct Sow Mar 21 May 10 – May 20
Red Vein Sorrel lettuce Direct Sow Mar 21 Perennial — see plant page
Red-Stem Malabar Spinach lettuce Direct Sow Mar 21 May 15 – May 30
Romaine Lettuce lettuce Direct Sow Mar 21 May 25 – Jun 4
Ruby Red Swiss Chard lettuce Direct Sow Mar 21 May 15 – May 20
Salad Bowl Green Lettuce lettuce Direct Sow Mar 21 May 9 – May 10
Shungiku (Edible Chrysanthemum) lettuce Direct Sow Mar 21 Apr 30 – May 15
Summer Bibb Lettuce lettuce Direct Sow Mar 21 May 15 – May 20
Swiss Chard lettuce Direct Sow Mar 21 May 10 – May 20
Tango Lettuce lettuce Direct Sow Mar 21 Apr 22 – Apr 30
Tatsoi lettuce Direct Sow Mar 21 Apr 15 – May 5
Tendergreen Mustard lettuce Direct Sow Mar 21 Apr 30 – May 10
Texas 1015Y SuperSweet Onion root vegetable Transplant Mar 26 Jul 9 – Jul 19
Tom Thumb Lettuce lettuce Direct Sow Mar 21 May 10 – May 30
Très Fine Maraîchère Frisée lettuce Direct Sow Mar 21 May 20
Tuscany Black Kale lettuce Direct Sow Mar 21 May 20 – Jun 4
Vates Collard lettuce Direct Sow Mar 21 May 20 – Jun 4
Vates Kale lettuce Direct Sow Mar 21 May 10 – May 15
Verona Red Chicory lettuce Direct Sow Mar 21 Jun 14 – Jun 21
Vienna Purple Kohlrabi brassica Direct Sow Mar 21 May 15 – May 25
Vienna White Kohlrabi brassica Direct Sow Mar 21 May 25
White Boston Lettuce lettuce Direct Sow Mar 21 Apr 30 – May 10
Winner Kohlrabi brassica Direct Sow Mar 21 May 5 – May 10
Winter Density Lettuce lettuce Direct Sow Mar 21 May 14 – May 20
Winter Giant Spinach lettuce Direct Sow Mar 21 May 5 – May 10
Witloof White Chicory lettuce Direct Sow Mar 21 Jul 5 – Jul 28

Harvest in March

Nothing to harvest in March for Zone 6B.
Next window: April — 13 varieties, including Astro Arugula, Chinese Broccoli (Gai Lan), Dutch Lamb's Lettuce.

Key Tasks for March in Zone 6B

  1. 1 Start 52 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 Direct sow seeds at the recommended depth and spacing. Keep the seedbed consistently moist until germination is complete.
  4. 4 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 6B planting calendar
February March in Zone 6B April

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