What should I plant in December in St. Louis, MO?

In December in St. Louis, MO (zone 6b), you can plant Chives, Parsley, Brussels Sprouts, Celery, Leek, and more. These dates are based on local climate data for your area.

When do I plant Chives in St. Louis, MO?

In St. Louis, MO (zone 6b), Chives: start seeds indoors Jan 1 – Apr 30 and Dec 24 – Dec 31, transplant outdoors Mar 1 – Jul 8.

When do I plant Parsley in St. Louis, MO?

In St. Louis, MO (zone 6b), Parsley: start seeds indoors Jan 1 – Jun 15 and Dec 24 – Dec 31, transplant outdoors Mar 1 – Aug 23.

When do I plant Brussels Sprouts in St. Louis, MO?

In St. Louis, MO (zone 6b), Brussels Sprouts: start seeds indoors Jan 1 – Feb 7 and Oct 24 – Dec 31, transplant outdoors Mar 1 – Jun 15.

What to Plant in December

St. Louis, MO · Zone 6b

Last frost: Apr 8 Frost-free days: 200

Full year calendar for St. Louis

The garden rests under snow or mulch. This is planning season — review what worked, order seeds, and sketch out next year's bed layouts.

December at a Glance

Indoor Transplant Direct Sow

1 5 10 15 20 25

Chives

Parsley

Brussels Sprouts

Celery

Leek

Onion

Start Indoors 6

Start these seeds indoors under grow lights or on a sunny windowsill.

Plant now

Brussels Sprouts

Oct 24 – Dec 31

1 per sq ft 80–110 days

Leek

Dec 9–31

4 per sq ft 90–150 days

Onion

Dec 9–31

9 per sq ft 100–120 days

Later this month

Chives

Dec 24–31

9 per sq ft 60–90 days

Parsley

Dec 24–31

4 per sq ft 70–90 days

Celery

Dec 24–31

4 per sq ft 80–120 days

December Gardening Tips

Start Celery, Brussels Sprouts, Leek indoors now to give them a head start before transplanting outside.
Get a soil test now — results come back fast in the off-season and you can amend before spring.