Zone 5 Planting Calendar

Zone 5 has cold, snowy winters (annual lows of -20 to -10°F) and warm summers, giving a moderate but distinctly four-season climate with a roughly 5-month frost-free growing window. Spring warms slowly and the first hard fall freeze arrives by mid-October, so heat-loving crops must be started indoors and frost-tender work is bracketed tightly between mid-May and early October.

Last Spring Frost: May 15 First Fall Frost: Oct 8 146-Day Growing Season

States & regions in Zone 5: Iowa, Nebraska, southern Wisconsin, southern Minnesota, northern Illinois (Chicago area), Ohio, Indiana, Pennsylvania (interior), much of Colorado's Front Range foothills, central New York, New England interior (Vermont, New Hampshire valleys), northern Missouri

What to Plant by Season in Zone 5

The right crops and methods for each season, based on zone 5's climate and frost timing.

What to Plant in Spring

Spring is the busiest planting window in zone 5: cold-hardy greens, roots, peas and brassicas go in as soon as soil is workable (late March to April), while warm-season crops are started indoors under lights for transplanting after the May 15 last frost. Watch for late frosts through late May and harden off transplants gradually.

Garden Pea Direct sow

Late Mar - Apr

Sow as soon as soil can be worked; tolerates light frost.

Snap / Snow Pea Direct sow

Late Mar - Apr

Direct sow early; trellis tall varieties.

Spinach Direct sow

Late Mar - Apr

Cold-hardy; bolts once heat arrives, so sow early.

Lettuce Direct sow

Late Mar - May

Succession sow every 2 weeks; transplants also work.

Arugula Direct sow

Late Mar - Apr

Fast and frost-tolerant.

Radish Direct sow

Late Mar - May

Ready in 25-30 days; succession sow.

Carrot Direct sow

Apr - May

Sow once soil is workable; keep seedbed moist for germination.

Beet Direct sow

Apr - May

Tolerates light frost; thin for good roots.

Turnip Direct sow

Apr - May

Quick spring crop; harvest before summer heat.

Parsnip Direct sow

Apr - early May

Slow to germinate; flavor improves with fall frost.

Potato Direct sow

Apr - early May

Plant seed potatoes 2-4 weeks before last frost; hill as they grow.

Onion (Bulb) Transplant

Apr

Use long-day varieties; transplant seedlings or sets early.

Scallion / Green Onion Direct sow

Apr - May

Very cold tolerant.

Shallot Plant sets / crowns

Apr

Plant sets early; harvest mid-summer.

Leek Transplant

Apr - May

Start indoors in Feb-Mar; transplant and blanch stems.

Broccoli Transplant

Apr - early May

Start indoors 5-6 weeks earlier; tolerates light frost.

Cauliflower Transplant

Apr - early May

Needs steady moisture; blanch heads.

Cabbage Transplant

Apr - early May

Hardy transplant; set out before last frost.

Kohlrabi Transplant

Apr - May

Fast brassica; harvest before bulbs get woody.

Kale Transplant

Apr - May

Very cold-hardy; direct sow also works.

Swiss Chard Direct sow

Apr - May

Heat and cold tolerant; one of the longest-cropping greens.

Collards Transplant

Apr - May

Hardy and heat tolerant; long harvest.

Mustard Greens Direct sow

Apr - May

Fast spicy greens; bolt in heat.

Bok Choy / Pak Choi Transplant

Apr

Bolts in heat; best as a cool-spring crop.

Cilantro / Coriander Direct sow

Apr - May

Bolts in summer heat; succession sow.

Dill Direct sow

Apr - May

Direct sow; self-seeds readily.

Parsley Transplant

Apr - May

Slow germinator; start indoors or buy transplants.

Chives Transplant

Apr - May

Perennial; divides easily.

Fava Bean Direct sow

Late Mar - Apr

Cool-season legume; sow as early as soil permits.

Tomato Start indoors

Late Mar - Apr

Start indoors 6-8 weeks before May 15; transplant after frost.

Pepper (Bell & Hot) Start indoors

Mar

Start indoors 8-10 weeks early; slow growers.

Eggplant Start indoors

Mar

Needs warmth; start indoors 8-10 weeks before last frost.

Basil Start indoors

Apr

Very frost-sensitive; start indoors, set out late May.

Asparagus Plant sets / crowns

Apr - early May

Plant crowns in a permanent bed; first real harvest year 3.

Rhubarb Plant sets / crowns

Apr

Plant crowns; perennial, do not harvest first year.

Strawberry Transplant

Apr - May

Plant bare-root crowns in early spring; pinch first-year blooms.

What to Plant in Summer

Summer is the main warm-season window: after the May 15 last frost, transplant tomatoes, peppers and other heat-lovers and direct sow beans, squash and corn into warm soil. Mid-summer is also the time to start fall brassicas and to sow heat-tolerant successions before the days shorten.

Tomato Transplant

Late May - early Jun

Set out after May 15; stake or cage and mulch.

Pepper (Bell & Hot) Transplant

Late May - early Jun

Wait for warm nights (above 55°F) before transplanting.

Eggplant Transplant

Late May - early Jun

Loves heat; use row cover early to hold warmth.

Tomatillo Transplant

Late May - early Jun

Plant at least two for pollination.

Ground Cherry Transplant

Late May - early Jun

Sprawling habit; fruit ready when husks drop.

Cucumber Direct sow

Late May - Jun

Sow in warm soil; trellis to save space.

Zucchini Direct sow

Late May - Jun

Extremely productive; one or two plants is plenty.

Summer Squash Direct sow

Late May - Jun

Harvest young and often.

Winter Squash Direct sow

Late May - early Jun

Needs full season; sow promptly after frost to mature by October.

Pumpkin Direct sow

Late May - early Jun

Long season; sow early for Halloween-size fruit.

Husk-less / Pie Pumpkin Direct sow

Late May - early Jun

Sow promptly to reach maturity before fall frost.

Muskmelon / Cantaloupe Transplant

Late May - early Jun

Use black plastic mulch and row cover for heat in zone 5.

Watermelon Transplant

Late May - early Jun

Choose short-season varieties; needs warm soil and heat.

Corn (Sweet) Direct sow

Late May - Jun

Plant in blocks for pollination; soil must be warm.

Bush Bean Direct sow

Late May - Jul

Succession sow every 2-3 weeks for continuous harvest.

Pole Bean Direct sow

Late May - Jun

Trellis; produces over a long window.

Lima Bean Direct sow

Late May - Jun

Needs warm soil and full season; choose early varieties in zone 5.

Edamame (Soybean) Direct sow

Late May - Jun

Harvest pods when plump and bright green.

Pole/Runner Bean (Scarlet) Direct sow

Late May - Jun

Attractive flowers; pick pods young.

Cowpea / Southern Pea Direct sow

Jun

Heat-loving; sow once soil is thoroughly warm.

Okra Transplant

Jun

Needs steady heat; start indoors and transplant into the warmest spot.

Amaranth (Leaf) Direct sow

Late May - Jun

Heat-tolerant green; harvest leaves young.

New Zealand Spinach Direct sow

Late May - Jun

Heat-tolerant spinach substitute for summer harvest.

Basil Transplant

Late May - Jun

Pinch tops to keep it bushy; never let it frost.

Sunflower Direct sow

Late May - Jun

Direct sow; choose dwarf or mammoth as desired.

Zinnia Direct sow

Late May - Jun

Heat-loving cut flower; deadhead for more blooms.

Marigold Transplant

Late May - Jun

Good pest-deterrent companion among vegetables.

Cosmos Direct sow

Late May - Jun

Thrives in lean soil; great pollinator plant.

Nasturtium Direct sow

Late May - Jun

Edible flowers; trap crop for aphids.

Broccoli Start indoors

Jun - Jul

Start fall crop indoors mid-summer for a September harvest.

Cabbage Start indoors

Jun - Jul

Start fall heads now; transplant in late July.

What to Plant in Fall

Fall in zone 5 is for cool-season successions and harvest: quick greens and roots sown in late summer mature into the cooler, sweeter days of September and October, and fall-planted garlic goes in for next year. Use row covers and cold frames to push harvests past the October 8 first frost.

Spinach Direct sow

Aug - early Sep

Cold-hardy; can overwinter under mulch for an early spring crop.

Lettuce Direct sow

Aug - early Sep

Cooler fall days improve flavor; protect from first frosts.

Arugula Direct sow

Aug - Sep

Thrives in fall cool; very frost-tolerant.

Mizuna Direct sow

Aug - Sep

Fast mild mustard; great in fall salad mixes.

Tatsoi Direct sow

Aug - Sep

Cold-hardy Asian green; sweetens after frost.

Mustard Greens Direct sow

Aug - Sep

Spicy fall green; tolerates light frost.

Radish Direct sow

Aug - Sep

Quick fall crop; sow up to ~4 weeks before frost.

Daikon Radish Direct sow

Aug

Sow by mid-August for full-size roots before hard freeze.

Turnip Direct sow

Aug

Fall roots sweeten with frost; greens are edible too.

Beet Direct sow

Late Jul - Aug

Fall crop matures in cool weather; mulch to extend.

Carrot Direct sow

Late Jul - early Aug

Fall carrots are sweetest after frost; mulch heavily to overwinter.

Kale Transplant

Aug

Frost makes it sweeter; harvest well into November under cover.

Collards Transplant

Aug

Very frost-hardy; flavor improves after a freeze.

Swiss Chard Direct sow

Late Jul - Aug

Keeps cropping into fall; protect from hard freezes.

Broccoli Transplant

Late Jul - Aug

Set out summer-started transplants for a fall harvest.

Cauliflower Transplant

Late Jul - Aug

Fall heads form in cool weather; needs steady moisture.

Cabbage Transplant

Late Jul - Aug

Fall cabbage stores well; tolerates frost.

Napa Cabbage Transplant

Late Jul - Aug

Best as a fall crop; bolts in spring heat.

Bok Choy / Pak Choi Direct sow

Aug

Fall planting avoids spring bolting.

Kohlrabi Direct sow

Aug

Fast fall bulbs; sweetens in cool weather.

Pac/Corn Salad (Mâche) Direct sow

Sep

Extremely cold-hardy; overwinters for very early spring greens.

Claytonia (Miner's Lettuce) Direct sow

Sep

Cold-frame green; harvests through winter under cover.

Cilantro / Coriander Direct sow

Aug - Sep

Fall cool keeps it from bolting quickly.

Garlic Plant sets / crowns

Late Sep - Oct

Plant cloves 4-6 weeks before ground freezes; mulch heavily.

Garden Pea Direct sow

Late Jul - early Aug

Fall pea crop matures before hard frost if sown early enough.

What to Plant in Winter

Outdoor planting essentially stops in zone 5 winter — the ground freezes and snow cover is common. This is the season for indoor seed-starting under lights, garden planning and ordering, protecting overwintering crops (mulched garlic, carrots, mâche in cold frames), and harvesting from cold frames or storage rather than sowing outdoors.

Pepper (Bell & Hot) Start indoors

Late Feb - Mar

Slow to germinate; start indoors under lights for May transplant.

Onion (Bulb) Start indoors

Jan - Feb

Long-day onions need an early indoor start to size up.

Leek Start indoors

Feb

Start indoors early; long season to maturity.

Celery Start indoors

Feb

Very slow from seed; needs a long indoor head start.

Celeriac Start indoors

Feb

Long season; start indoors in late winter.

Eggplant Start indoors

Late Feb - Mar

Needs warmth and a long start; sow indoors under lights.

Tomato Start indoors

Mar

Start 6-8 weeks before May 15; not before late winter to avoid leggy plants.

Full Planting Timing Table

Start-indoors, direct-sow, transplant, and harvest windows for every crop in zone 5.

Vegetables

Plant Start Indoors Direct Sow Transplant Harvest Notes
Amaranth (Leaf) Late May - Jun Heat-tolerant green; harvest leaves young.
Arugula Late Mar - Apr Thrives in fall cool; very frost-tolerant.
Asparagus Apr - early May Plant crowns in a permanent bed; first real harvest year 3.
Beet Late Jul - Aug Tolerates light frost; thin for good roots.
Bok Choy / Pak Choi Aug Apr Fall planting avoids spring bolting.
Broccoli Jun - Jul Late Jul - Aug Set out summer-started transplants for a fall harvest.
Bush Bean Late May - Jul Succession sow every 2-3 weeks for continuous harvest.
Cabbage Jun - Jul Late Jul - Aug Fall cabbage stores well; tolerates frost.
Carrot Late Jul - early Aug Sow once soil is workable; keep seedbed moist for germination.
Cauliflower Late Jul - Aug Fall heads form in cool weather; needs steady moisture.
Celeriac Feb Long season; start indoors in late winter.
Celery Feb Very slow from seed; needs a long indoor head start.
Claytonia (Miner's Lettuce) Sep Cold-frame green; harvests through winter under cover.
Collards Aug Very frost-hardy; flavor improves after a freeze.
Corn (Sweet) Late May - Jun Plant in blocks for pollination; soil must be warm.
Cowpea / Southern Pea Jun Heat-loving; sow once soil is thoroughly warm.
Cucumber Late May - Jun Sow in warm soil; trellis to save space.
Daikon Radish Aug Sow by mid-August for full-size roots before hard freeze.
Edamame (Soybean) Late May - Jun Harvest pods when plump and bright green.
Eggplant Mar Late May - early Jun Loves heat; use row cover early to hold warmth.
Fava Bean Late Mar - Apr Cool-season legume; sow as early as soil permits.
Garden Pea Late Mar - Apr Sow as soon as soil can be worked; tolerates light frost.
Garlic Late Sep - Oct Plant cloves 4-6 weeks before ground freezes; mulch heavily.
Husk-less / Pie Pumpkin Late May - early Jun Sow promptly to reach maturity before fall frost.
Kale Aug Frost makes it sweeter; harvest well into November under cover.
Kohlrabi Aug Apr - May Fast brassica; harvest before bulbs get woody.
Leek Feb Apr - May Start indoors early; long season to maturity.
Lettuce Late Mar - May Cooler fall days improve flavor; protect from first frosts.
Lima Bean Late May - Jun Needs warm soil and full season; choose early varieties in zone 5.
Mizuna Aug - Sep Fast mild mustard; great in fall salad mixes.
Mustard Greens Aug - Sep Spicy fall green; tolerates light frost.
Napa Cabbage Late Jul - Aug Best as a fall crop; bolts in spring heat.
New Zealand Spinach Late May - Jun Heat-tolerant spinach substitute for summer harvest.
Okra Jun Needs steady heat; start indoors and transplant into the warmest spot.
Onion (Bulb) Jan - Feb Apr Long-day onions need an early indoor start to size up.
Pac/Corn Salad (Mâche) Sep Extremely cold-hardy; overwinters for very early spring greens.
Parsnip Apr - early May Slow to germinate; flavor improves with fall frost.
Pepper (Bell & Hot) Mar Late May - early Jun Slow to germinate; start indoors under lights for May transplant.
Pole Bean Late May - Jun Trellis; produces over a long window.
Pole/Runner Bean (Scarlet) Late May - Jun Attractive flowers; pick pods young.
Potato Apr - early May Plant seed potatoes 2-4 weeks before last frost; hill as they grow.
Pumpkin Late May - early Jun Long season; sow early for Halloween-size fruit.
Radish Late Mar - May Ready in 25-30 days; succession sow.
Rhubarb Apr Plant crowns; perennial, do not harvest first year.
Scallion / Green Onion Apr - May Very cold tolerant.
Shallot Apr Plant sets early; harvest mid-summer.
Snap / Snow Pea Late Mar - Apr Direct sow early; trellis tall varieties.
Spinach Late Mar - Apr Cold-hardy; can overwinter under mulch for an early spring crop.
Summer Squash Late May - Jun Harvest young and often.
Swiss Chard Late Jul - Aug Keeps cropping into fall; protect from hard freezes.
Tatsoi Aug - Sep Cold-hardy Asian green; sweetens after frost.
Tomatillo Late May - early Jun Plant at least two for pollination.
Tomato Mar Late May - early Jun Set out after May 15; stake or cage and mulch.
Turnip Aug Quick spring crop; harvest before summer heat.
Winter Squash Late May - early Jun Needs full season; sow promptly after frost to mature by October.
Zucchini Late May - Jun Extremely productive; one or two plants is plenty.

Herbs

Plant Start Indoors Direct Sow Transplant Harvest Notes
Basil Apr Late May - Jun Pinch tops to keep it bushy; never let it frost.
Chives Apr - May Perennial; divides easily.
Cilantro / Coriander Aug - Sep Fall cool keeps it from bolting quickly.
Dill Apr - May Direct sow; self-seeds readily.
Parsley Apr - May Slow germinator; start indoors or buy transplants.

Fruits

Plant Start Indoors Direct Sow Transplant Harvest Notes
Ground Cherry Late May - early Jun Sprawling habit; fruit ready when husks drop.
Muskmelon / Cantaloupe Late May - early Jun Use black plastic mulch and row cover for heat in zone 5.
Strawberry Apr - May Plant bare-root crowns in early spring; pinch first-year blooms.
Watermelon Late May - early Jun Choose short-season varieties; needs warm soil and heat.

Flowers

Plant Start Indoors Direct Sow Transplant Harvest Notes
Cosmos Late May - Jun Thrives in lean soil; great pollinator plant.
Marigold Late May - Jun Good pest-deterrent companion among vegetables.
Nasturtium Late May - Jun Edible flowers; trap crop for aphids.
Sunflower Late May - Jun Direct sow; choose dwarf or mammoth as desired.
Zinnia Late May - Jun Heat-loving cut flower; deadhead for more blooms.

Zone 5 Growing Tips

Frequently Asked Questions

What can I plant in spring in zone 5?

In zone 5, spring planting includes Garden Pea, Snap / Snow Pea, Spinach, Lettuce, Arugula, Radish, Carrot, Beet, and more. See the spring section above for each crop's timing.

What is the last frost date for zone 5?

The average last spring frost date for USDA zone 5 is May 15. The first fall frost typically arrives around Oct 8, giving a growing season of approximately 146 days.

When can I start seeds indoors in zone 5?

In zone 5, start crops like Tomato indoors around Late Mar - Apr. Check the seasonal sections above for each crop's indoor-sowing window.

What can I plant in fall in zone 5?

Fall planting in zone 5 includes Spinach, Lettuce, Arugula, Mizuna, Tatsoi, Mustard Greens, Radish, Daikon Radish, and more.

How long is the growing season in zone 5?

Zone 5 has an average growing season of 146 days, from the last spring frost around May 15 to the first fall frost around Oct 8.