Zone 5B — March

What to Plant in March in Zone 5B

March in Zone 5B: 31 crops to start indoors, 2 to plant or direct sow outside, and 0 entering harvest window. Last frost averages April 17. Reference city: Kansas City, MO.
31 Start Indoors
2 Plant Outside
0 Harvest

Start Indoors in March

Plant Type Start Indoors Transplant Outside Harvest Window
Tatsoi tatsoi Mar 6 Mar 20 Apr 14 – May 4
Alexandria Alpine Strawberry strawberry Mar 13 Apr 24 Aug 2 – Aug 22
Black Beauty Zucchini vegetable Mar 31 Apr 28 Jun 12 – Jun 22
Brilliant Celeriac celeriac Mar 6 Apr 17 Aug 5 – Aug 15
Curly Parsley herb Mar 13 Apr 17 Jun 26 – Jul 6
Daikon Radishes daikon radish Mar 27 Apr 3 May 18 – May 28
Flat-Leaf Parsley herb Mar 13 Apr 17 Jun 26 – Jul 16
Imperial Star Artichoke artichoke Mar 13 Apr 17 Jul 16 – Jul 26
Mrs. Burns Lemon Basil basil Mar 27 Apr 24 Jun 23 – Jul 3
Sweet Marjoram marjoram Mar 27 Apr 24 Jul 8 – Jul 23
Anaheim Peppers pepper Mar 27 May 1 Jul 17 – Jul 25
Bhut Jolokia Ghost Pepper pepper Mar 27 May 1 Jul 30 – Aug 29
Big Jim Hatch Chile pepper Mar 27 May 1 Jul 10 – Jul 15
Broccolini vegetable Mar 27 May 1 Jun 20 – Jul 10
Brussels Sprouts vegetable Mar 27 May 1 Jul 25 – Aug 19
Caribbean Red Scotch Bonnet Pepper pepper Mar 27 May 1 Aug 4 – Aug 29
Cayenne Peppers pepper Mar 27 May 1 Jul 25 – Aug 4
Corno di Toro Pepper pepper Mar 27 May 1 Jul 15 – Jul 20
Fresno Peppers pepper Mar 27 May 1 Jul 15 – Jul 20
Green Cabbage vegetable Mar 27 May 1 Jun 30 – Aug 9
Habanero Pepper pepper Mar 27 May 8 Aug 6 – Sep 5
Hungarian Hot Wax Pepper pepper Mar 27 May 1 Jul 5 – Jul 15
Jalapeño Peppers pepper Mar 27 May 1 Jul 5 – Jul 15
Pinkeye Purple Hull Pea cowpea Mar 6 May 1 Jun 25 – Jul 8
Poblano Peppers pepper Mar 27 May 1 Jul 5 – Jul 15
Red Cabbage vegetable Mar 27 May 1 Jul 10 – Aug 19
Romanesco vegetable Mar 27 May 1 Jul 15 – Aug 9
Serrano Peppers pepper Mar 27 May 1 Jul 10 – Jul 20
Snow Crown Cauliflower vegetable Mar 27 May 1 Jun 20 – Jun 30
Thai Hot Peppers pepper Mar 27 May 1 Jul 15 – Jul 25
Waltham 29 Broccoli vegetable Mar 27 May 1 Jul 15 – Jul 30

Plant Outside in March

Plant Type Action Target Date Harvest Window
Tatsoi tatsoi Transplant Mar 20 Apr 14 – May 4
Texas 1015Y SuperSweet Onion root Transplant Mar 20 Jul 3 – Jul 13

Harvest in March

No crops entering harvest in March for Zone 5B.

Key Tasks for March in Zone 5B

  1. 1 Start 31 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.
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