Zone 3b planting calendar

What to plant in June — zone 3b

Zone 3b averages its last spring frost around May 25 and its first fall frost around September 15. Everything below is timed from those two dates, so it stays useful whether you're planting for summer or for a fall harvest.

Last frost: May 25
First frost: September 15
Winter lows: -35 to -30 °F

Direct sow

  • Bush beanaround Jun 1

    Soil is ready 1 weeks after last frost.

  • Basilaround Jun 8

    Soil is ready 2 weeks after last frost.

  • Bush beanaround Jun 8

    Warm soil — first summer sowing of bush bean.

  • Beetaround Jun 22

    Warm soil — first summer sowing of beet.

  • Carrotaround Jun 22

    Warm soil — first summer sowing of carrot.

Start indoors for fall

  • Kalearound Jun 7

    Fall kale window opens — sow trays any time in the next four weeks.

  • Broccoliaround Jun 18

    Seedlings need 5 weeks before they go out for a fall harvest.

Transplant out

  • Tomatoaround Jun 8

    Safe to set out 2 weeks after last frost. Bury 2/3 of the transplant stem — roots form along the buried stem for a stronger plant.

  • Basilaround Jun 8

    Safe to set out 2 weeks after last frost. Pinch flower spikes the moment you see them — leaves stay sweet all season.

Direct sow for fall

  • Parsleyaround Jun 9

    Fall parsley window opens — sowing now beats the last-minute date by a month of growth.

  • Bush beanaround Jun 14

    Fall bush bean window opens — sowing now beats the last-minute date by a month of growth.

  • Lettucearound Jun 15

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

  • Peaaround Jun 19

    Fall pea window opens — sowing now beats the last-minute date by a month of growth.

  • Cilantroaround Jun 20

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

  • Carrotaround Jun 20

    Fall carrot window opens — sowing now beats the last-minute date by a month of growth.

  • Beetaround Jun 24

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

  • Dillaround Jun 24

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

Garden care

  • Mulch every bedaround Jun 15

    3-4 in of straw or leaves now holds water, blocks weeds, and cools roots for the whole summer.

  • Set up deep wateringaround Jun 22

    Switch to fewer, longer soaks (1-1.5 in/week at the root) instead of daily sprinkles.

Succession sow

  • Bush beanaround Jun 22

    Sowing 2: replant every 14 days so one planting never has to feed you all season.

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