Zone 5a planting calendar

What to plant in June — zone 5a

Zone 5a averages its last spring frost around May 10 and its first fall frost around October 1. 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 10
First frost: October 1
Winter lows: -20 to -15 °F

Plan & order

  • Order fall seedaround Jun 3

    Fall brassicas and greens get sown in the heat of summer — have the seed on hand before that window opens.

Start indoors for fall

  • Broccoliaround Jun 6

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

  • Kalearound Jun 23

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

Succession sow

  • Bush beanaround Jun 7

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

  • Sweet cornaround Jun 7

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

  • Cucumberaround Jun 14

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

  • Zucchiniaround Jun 14

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

  • Basilaround Jun 14

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

  • Bush beanaround Jun 21

    Sowing 3: replant every 14 days so one planting never has to feed you all season.

  • Winter squasharound Jun 21

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

  • Sweet cornaround Jun 21

    Sowing 3: replant every 14 days so one planting never has to feed you all season.

  • Beetaround Jun 28

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

  • Carrotaround Jun 28

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

Direct sow

  • Beetaround Jun 7

    Warm soil — first summer sowing of beet.

  • Carrotaround Jun 7

    Warm soil — first summer sowing of carrot.

Garden care

  • Set up deep wateringaround Jun 7

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

  • Side-dress heavy feedersaround Jun 21

    Tomatoes, peppers, corn and squash get compost or fish emulsion once fruit sets.

  • Prune and stake tomatoesaround Jun 28

    Pull suckers and lower leaves for airflow — the main defense against blight in humid heat.

Direct sow for fall

  • Parsleyaround Jun 25

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

  • Bush beanaround Jun 30

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

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