What to Plant in March
Kansas City, MO · Zone 6a
Last frost: Apr 10
Frost-free days: 193
Spring is building momentum. Start tomatoes and peppers indoors if you haven't already. Cool-season crops like peas, spinach, and lettuce can go outdoors once the soil is workable.
March at a Glance
Indoor
Transplant
Direct Sow
Start Indoors 24
Start these seeds indoors under grow lights or on a sunny windowsill.
Chives
Jan 1 – Apr 30
9 per sq ft
60–90 days
Lavender
Jan 1 – Mar 8
1 per sq ft
90–120 days
Mint
Jan 1 – May 8
4 per sq ft
60–90 days
Parsley
Jan 1 – Jun 8
4 per sq ft
70–90 days
Rosemary
Jan 1 – Mar 16
1 per sq ft
80–120 days
Celery
Jan 1 – Mar 16
4 per sq ft
80–120 days
Leek
Jan 1 – Apr 15
4 per sq ft
90–150 days
Onion
Jan 1 – Apr 15
9 per sq ft
100–120 days
Thyme
Jan 9 – Apr 15
4 per sq ft
70–90 days
Artichoke
Jan 9 – May 8
1 per sq ft
85–100 days
Broccoli
Jan 9 – Apr 15
1 per sq ft
60–100 days
Cabbage
Jan 9 – Apr 15
1 per sq ft
70–100 days
Cauliflower
Jan 9 – Apr 15
1 per sq ft
55–100 days
Kale
Jan 17 – Jul 23
1 per sq ft
50–65 days
Strawberry
Jan 17 – May 23
4 per sq ft
60–90 days
Oregano
Jan 24 – May 8
1 per sq ft
60–90 days
Sage
Jan 24 – Apr 30
1 per sq ft
75–90 days
Lettuce
Feb 1 – Apr 30
4 per sq ft
45–60 days
Spinach
Feb 1 – Apr 8
9 per sq ft
35–50 days
Swiss Chard
Feb 1 – Aug 16
4 per sq ft
50–60 days
Eggplant
Feb 22 – Mar 31
1 per sq ft
70–90 days
Pepper
Feb 22 – Apr 8
1 per sq ft
60–100 days
Growing guide
Tomato
Mar 1 – Apr 30
1 per sq ft
65–80 days
Growing guide
Sunflower
Mar 9 – May 16
1 per sq ft
70–100 days
Transplant 21
Move these seedlings from indoors to your garden beds.
Plant now
Chives
Mar 1 – Jul 8
9 per sq ft
60–90 days
Mint
Mar 1 – Jul 8
4 per sq ft
60–90 days
Parsley
Mar 1 – Aug 16
4 per sq ft
70–90 days
Broccoli
Mar 1 – Jun 8
1 per sq ft
60–100 days
Brussels Sprouts
Mar 1 – Jun 8
1 per sq ft
80–110 days
Cabbage
Mar 1 – Jun 8
1 per sq ft
70–100 days
Cauliflower
Mar 1 – Jun 8
1 per sq ft
55–100 days
Kale
Mar 1 – Sep 8
1 per sq ft
50–65 days
Leek
Mar 1 – Jul 8
4 per sq ft
90–150 days
Lettuce
Mar 1 – May 31
4 per sq ft
45–60 days
Onion
Mar 1 – Jul 8
9 per sq ft
100–120 days
Spinach
Mar 1 – May 8
9 per sq ft
35–50 days
Strawberry
Mar 1 – Jul 8
4 per sq ft
60–90 days
Swiss Chard
Mar 1 – Sep 15
4 per sq ft
50–60 days
Later this month
Lavender
Mar 17 – May 23
1 per sq ft
90–120 days
Oregano
Mar 17 – Jun 30
1 per sq ft
60–90 days
Rosemary
Mar 17 – May 31
1 per sq ft
80–120 days
Sage
Mar 17 – Jun 23
1 per sq ft
75–90 days
Thyme
Mar 17 – Jun 23
4 per sq ft
70–90 days
Artichoke
Mar 17 – Jul 16
1 per sq ft
85–100 days
Celery
Mar 17 – Jun 8
4 per sq ft
80–120 days
Direct Sow 8
Plant these seeds directly into the soil outdoors.
Plant now
Garlic
Jan 1 – Aug 16
9 per sq ft
180–240 days
Cilantro
Feb 22 – May 31
9 per sq ft
30–45 days
Beet
Feb 22 – Sep 23
9 per sq ft
50–70 days
Peas
Feb 22 – Jun 8
8 per sq ft
55–70 days
Radish
Feb 22 – May 31
16 per sq ft
22–30 days
Turnip
Feb 22 – Oct 8
9 per sq ft
30–60 days
Carrot
Mar 1 – Aug 16
16 per sq ft
70–80 days
Later this month
Potato
Mar 24 – Jul 23
1 per sq ft
70–150 days
March Gardening Tips
- Start Tomato, Pepper, Lettuce indoors now to give them a head start before transplanting outside.
- Lettuce, Broccoli, Cabbage can be transplanted outside this month. Harden off seedlings over 5–7 days before planting out.
- Direct sow Carrot, Peas, Potato straight into the garden — no transplanting needed.
- Add compost to beds now so nutrients are available when planting time arrives.
Nearby Cities
Ready to plan your garden?
Add these crops to your garden plan and get personalized planting reminders for Zone 6a.
Start Planning Free