Zone 4b planting calendar

What to plant in July: zone 4b

A rule-of-thumb starting point for zone 4b: last spring frost around May 15, first fall frost around September 25. Zones are set by winter lows, not frost dates, so two gardens in the same zone can be weeks apart. Measure your ZIP below for dates from your area's own 30-year record.

These are zone-average dates. Check an area-level frost estimate from thirty years of nearby weather history and this calendar retimes itself.
Typical last frost: May 15
Typical first frost: September 25
Winter lows: -25 to -20 °F
Zone 4b Almanac. What growers here actually recorded: sowing weeks, days to first pick, and yields.

Succession sow

  • Beetaround Jul 3

    Sowing 2: replant every 21 days so one planting never has to feed you all season.

  • Carrotaround Jul 3

    Sowing 2: replant every 21 days so one planting never has to feed you all season.

  • Bush beanaround Jul 10

    Sowing 4: replant every 14 days so one planting never has to feed you all season.

  • Cucumberaround Jul 10

    Sowing 3: replant every 21 days so one planting never has to feed you all season.

  • Zucchiniaround Jul 10

    Sowing 3: replant every 21 days so one planting never has to feed you all season.

  • Basil2 sowings: Jul 10 and Jul 31

    Sowing 3: replant every 21 days so one planting never has to feed you all season. Sowing again a few weeks later keeps the harvest coming instead of arriving all at once.

  • Winter squasharound Jul 17

    Sowing 3: replant every 21 days so one planting never has to feed you all season.

Garden care

  • Prune and stake tomatoes3 sowings: Jul 3 and Jul 10 and Jul 17

    Pull suckers and lower leaves for airflow. The main defense against blight in humid heat. Sowing again a few weeks later keeps the harvest coming instead of arriving all at once.

Direct sow for fall

  • Beetaround Jul 4

    Fall beet window opens. Sowing now beats the last-minute date by a month of growth.

  • Dillaround Jul 4

    Fall dill window opens. Sowing now beats the last-minute date by a month of growth.

  • Spinacharound Jul 16

    Succession sowing 3 of 3. Sow every 21 days for a steady cut.

  • Lettucearound Jul 16

    Succession sowing 2 of 3. Sow every 21 days for a steady cut.

  • Parsleyaround Jul 17

    Counts back 70 days from your first frost. Takes a light frost with cover.

  • Cilantroaround Jul 21

    Succession sowing 2 of 3. Sow every 21 days for a steady cut.

  • Bush beanaround Jul 22

    Counts back 55 days from your first frost. Frost-tender: must finish before frost.

  • Peaaround Jul 27

    Counts back 60 days from your first frost. Takes a light frost with cover.

  • Carrotaround Jul 28

    Counts back 70 days from your first frost. Frost-hardy: light freezes sweeten it.

Start indoors for fall

  • Kalearound Jul 15

    Seedlings need 4 weeks before they go out for a fall harvest.

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