What should I plant in April in zone 3b?

In April in zone 3b, you can plant Marigolds, Sweet Peas, Alyssum, Basil, Parsley, and more. Check indoor start, transplant, and direct sow dates for your specific zone.

When do I plant Marigolds in zone 3b?

In zone 3b, Marigolds: start seeds indoors Apr 15--May 1, transplant outdoors Jun 1--10, direct sow Jun 1.

When do I plant Sweet Peas in zone 3b?

In zone 3b, Sweet Peas: direct sow Apr 15--May 1.

When do I plant Alyssum in zone 3b?

In zone 3b, Alyssum: start seeds indoors Apr 1, transplant outdoors May 15, direct sow May 15--Jun 1.

What to Plant in April

USDA Zone 3b

Last frost: May 15 – Jun 1 Frost-free days: 90–120

Zone:

The season is opening up. Direct sow cold-hardy crops like peas, spinach, and radishes as soon as the ground thaws. Continue starting warm-season seedlings indoors.

April at a Glance

Indoor Transplant Direct Sow

1 5 10 15 20 25

Marigolds

Sweet Peas

Alyssum

Basil

Parsley

Mint

Tomatoes

Broccoli

Cauliflower

Cabbage

Brussels Sprouts

Kale

Lettuce

Spinach

Peas

Swiss Chard

Start Indoors 13

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

Parsley

Mar 15 – Apr 1

4 per sq ft 70–90 days

Tomatoes

Mar 15 – Apr 1

1 per sq ft 65–80 days

Broccoli

Mar 15 – Apr 1

1 per sq ft 60–100 days

Cauliflower

Mar 15 – Apr 1

1 per sq ft 55–100 days

Cabbage

Mar 15 – Apr 1

1 per sq ft 70–100 days

Brussels Sprouts

Mar 15 – Apr 1

1 per sq ft 80–110 days

Alyssum

Apr 1–8

Mint

Apr 1–8

4 per sq ft 60–90 days

Kale

Apr 1–15

1 per sq ft 50–65 days

Lettuce

Apr 1–15

4 per sq ft 45–60 days

Marigolds

Apr 15 – May 1

Basil

Apr 15 – May 1

4 per sq ft 25–35 days

Swiss Chard

Apr 15–22

4 per sq ft 50–60 days

Direct Sow 3

Plant these seeds directly into the soil outdoors.

Sweet Peas

Apr 15 – May 1

Spinach

Apr 15 – May 15

9 per sq ft 35–50 days

Peas

Apr 15 – May 15

8 per sq ft 55–70 days

April Gardening Tips

Start Lettuce, Broccoli, Cabbage indoors now to give them a head start before transplanting outside.
Direct sow Peas, Spinach, Sweet Peas straight into the garden — no transplanting needed.
Soil temperature matters more than air temperature for germination. Use a soil thermometer before direct sowing.