What should I plant in January in Milwaukee, WI?

In January in Milwaukee, WI (zone 5b), you can plant Chives, Parsley, Brussels Sprouts, Leek, Onion, and more. These dates are based on local climate data for your area.

When do I plant Chives in Milwaukee, WI?

In Milwaukee, WI (zone 5b), Chives: start seeds indoors Jan 24 – Apr 23, transplant outdoors Apr 1 – Jun 30.

When do I plant Parsley in Milwaukee, WI?

In Milwaukee, WI (zone 5b), Parsley: start seeds indoors Jan 24 – May 23, transplant outdoors Apr 1 – Jul 31.

When do I plant Brussels Sprouts in Milwaukee, WI?

In Milwaukee, WI (zone 5b), Brussels Sprouts: start seeds indoors Jan 1 – Mar 8 and Dec 1 – Dec 31, transplant outdoors Apr 9 – Jul 16.

What to Plant in January

Milwaukee, WI · Zone 5b

Last frost: Apr 25 Frost-free days: 173

Full year calendar for Milwaukee

The garden is dormant outdoors, but it's time to start planning and get seed orders in. Some long-season crops like peppers and onions can be started indoors this month.

January at a Glance

Indoor Transplant Direct Sow

1 5 10 15 20 25

Chives

Parsley

Brussels Sprouts

Leek

Onion

Start Indoors 5

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

Plant now

Brussels Sprouts

Jan 1 – Mar 8

1 per sq ft 80–110 days

Leek

Jan 9 – Mar 31

4 per sq ft 90–150 days

Onion

Jan 9 – Apr 8

9 per sq ft 100–120 days

Later this month

Chives

Jan 24 – Apr 23

9 per sq ft 60–90 days

Parsley

Jan 24 – May 23

4 per sq ft 70–90 days

January Gardening Tips

Start Brussels Sprouts, Leek, Onion indoors now to give them a head start before transplanting outside.
Check seed starting supplies — grow lights, heat mats, and fresh seed-starting mix. Order seeds early for the best selection.