Zone 4b Planting Calendar

Every listed crop, timed for zone 4b. Not sure this is your zone? Change it using the zone picker at the top of the page.

This zone has a single frost date, and the windows below are based on it.

Vegetables & Herbs

PlantSpacingWindowMethodStart indoorsDirect sow / transplantEst. harvest
Garlic4 per sq ft—Direct sow—Dec 26–Jan 2 '27~240 days after direct-sowing
Superhot Pepper (Ghost, Reaper, Scorpion)1 per sq ft—Start indoorsFeb 27–Mar 6May 29–Jun 5~135 days after transplanting
Celery4 per sq ft—Start indoorsMar 6–Mar 13May 1–May 8~120 days after transplanting
Leek9 per sq ft—Start indoorsMar 6–Mar 13Apr 24–May 1~110 days after transplanting
Rosemary1 per sq ft—Start indoorsMar 6–Mar 13May 29–Jun 5~90 days after transplanting
Pepper1 per sq ft—Start indoorsMar 20–Mar 27May 29–Jun 5~75 days after transplanting
Onion9 per sq ft—Start indoorsMar 20–Mar 27Apr 24–May 1~100 days after transplanting
Eggplant1 per sq ft—Start indoorsMar 20–Mar 27May 29–Jun 5~75 days after transplanting
Sweet Potato~4 sq ft each—Start indoorsMar 20–Mar 27Jun 5–Jun 12~110 days after transplanting
Thyme4 per sq ft—Start indoorsMar 20–Mar 27May 22–May 29~90 days after transplanting
Oregano4 per sq ft—Start indoorsMar 20–Mar 27May 22–May 29~80 days after transplanting
Chives9 per sq ft—EitherMar 20–Mar 27May 1–May 8~60 days after planting
Parsley4 per sq ft—EitherMar 20–Mar 27May 1–May 8~75 days after planting
Sage1 per sq ft—Start indoorsMar 20–Mar 27May 29–Jun 5~75 days after transplanting
Collard Greens1 per sq ft—EitherMar 27–Apr 3Apr 24–May 1~70 days after planting
Tomato1 per sq ft—Start indoorsApr 3–Apr 10May 29–Jun 5~70 days after transplanting
Kale1 per sq ft—EitherApr 3–Apr 10Apr 24–May 1~60 days after planting
Pea8 per sq ft—Direct sow—Apr 3–Apr 10~60 days after direct-sowing
Broccoli1 per sq ft—Start indoorsApr 3–Apr 10May 1–May 8~65 days after transplanting
Cabbage1 per sq ft—Start indoorsApr 3–Apr 10May 1–May 8~70 days after transplanting
Basil4 per sq ft—Start indoorsApr 3–Apr 10May 29–Jun 5~60 days after transplanting
Cauliflower1 per sq ft—Start indoorsApr 3–Apr 10May 1–May 8~70 days after transplanting
Brussels Sprouts1 per sq ft—Start indoorsApr 3–Apr 10May 1–May 8~95 days after transplanting
Arugula9 per sq ft—Direct sow—Apr 10–Apr 17~40 days after direct-sowing
Bok Choy1 per sq ft—EitherApr 10–Apr 17May 15–May 22~50 days after planting
Kohlrabi4 per sq ft—EitherApr 10–Apr 17May 1–May 8~55 days after planting
Fennel (Florence/bulbing)1 per sq ft—EitherApr 10–Apr 17May 29–Jun 5~90 days after planting
Lettuce4 per sq ft—EitherApr 17–Apr 24May 1–May 8~45 days after planting
Spinach9 per sq ft—Direct sow—Apr 17–Apr 24~40 days after direct-sowing
Swiss Chard4 per sq ft—EitherApr 17–Apr 24May 1–May 8~55 days after planting
Radish16 per sq ft—Direct sow—Apr 17–Apr 24~25 days after direct-sowing
Okra1 per sq ft—EitherApr 17–Apr 24May 29–Jun 5~58 days after planting
Cucumber2 per sq ft—EitherApr 24–May 1May 22–May 29~55 days after planting
Zucchini1 per sq ft—EitherApr 24–May 1May 22–May 29~50 days after planting
Carrot16 per sq ft—Direct sow—Apr 24–May 1~70 days after direct-sowing
Beet9 per sq ft—Direct sow—Apr 24–May 1~55 days after direct-sowing
Cantaloupe~4 sq ft each—EitherApr 24–May 1May 29–Jun 5~80 days after planting
Turnip9 per sq ft—Direct sow—Apr 24–May 1~50 days after direct-sowing
Mustard Greens4 per sq ft—Direct sow—Apr 24–May 1~40 days after direct-sowing
Cilantro9 per sq ft—Direct sow—May 1–May 8~50 days after direct-sowing
Potato1 per sq ft—Direct sow—May 1–May 8~90 days after direct-sowing
Scallion (Green Onion)9 per sq ft—Direct sow—May 1–May 8~60 days after direct-sowing
Dill4 per sq ft—Direct sow—May 8–May 15~55 days after direct-sowing
Winter Squash~4 sq ft each—Direct sow—May 22–May 29~100 days after direct-sowing
Pumpkin~4 sq ft each—Direct sow—May 22–May 29~110 days after direct-sowing
Bush Beans9 per sq ft—Direct sow—May 22–May 29~55 days after direct-sowing
Sweet Corn1 per sq ft—Direct sow—May 22–May 29~75 days after direct-sowing
Watermelon~4 sq ft each—Direct sow—May 29–Jun 5~85 days after direct-sowing

Flowers

PlantSpacingWindowMethodStart indoorsDirect sow / transplantEst. bloom
Tulip7 per sq ft—Direct sow—Sep–Oct~180 days after direct-sowing
Daffodil (Narcissus)5 per sq ft—Direct sow—Sep–Nov~150 days after direct-sowing
Crocus12 per sq ft—Direct sow—Sep–Nov~150 days after direct-sowing
Hyacinth5 per sq ft—Direct sow—Sep–Nov~150 days after direct-sowing
Ornamental Allium5 per sq ft—Direct sow—Sep–Nov~195 days after direct-sowing
Pansy / Viola2 per sq ft—Start indoorsFeb 20–Feb 27May 1–May 8~65 days after transplanting
Vinca (Madagascar Periwinkle)1 per sq ft—Start indoorsMar 6–Mar 13May 29–Jun 5~80 days after transplanting
Petunia1 per sq ft—Start indoorsMar 13–Mar 20May 29–Jun 5~70 days after transplanting
Snapdragon2 per sq ft—Start indoorsMar 13–Mar 20May 8–May 15~90 days after transplanting
Purple Coneflower~4 sq ft each—EitherMar 13–Mar 20May 29–Jun 5~365 days after planting
Salvia (Scarlet Sage)1 per sq ft—Start indoorsMar 20–Mar 27May 29–Jun 5~80 days after transplanting
Calendula1 per sq ft—EitherMar 27–Apr 3May 1–May 8~50 days after planting
Black-Eyed Susan1 per sq ft—EitherMar 27–Apr 3Apr 24–May 1~70 days after planting
Bachelor's Button (Cornflower)3 per sq ft—EitherMar 27–Apr 3May 1–May 8~75 days after planting
Sweet Alyssum3 per sq ft—EitherMar 27–Apr 3May 15–May 22~40 days after planting
Gaillardia (Blanket Flower)1 per sq ft—EitherMar 27–Apr 3May 22–May 29~80 days after planting
Portulaca (Moss Rose)1 per sq ft—EitherMar 27–Apr 3May 22–May 29~60 days after planting
Celosia2 per sq ft—EitherMar 27–Apr 3May 22–May 29~80 days after planting
Gomphrena (Globe Amaranth)1 per sq ft—Start indoorsMar 27–Apr 3May 22–May 29~90 days after transplanting
Angelonia (Summer Snapdragon)2 per sq ft—Start indoorsMar 27–Apr 3May 29–Jun 5~98 days after transplanting
Cleome (Spider Flower)1 per sq ft—EitherMar 27–Apr 3May 29–Jun 5~75 days after planting
Marigold4 per sq ft—EitherApr 3–Apr 10May 22–May 29~50 days after planting
Sweet Pea2 per sq ft—Direct sow—Apr 3–Apr 10~85 days after direct-sowing
Cosmos1 per sq ft—EitherApr 10–Apr 17May 22–May 29~70 days after planting
Moonflower2 per sq ft—EitherApr 10–Apr 17May 15–May 22~90 days after planting
Zinnia1 per sq ft—EitherApr 17–Apr 24May 22–May 29~65 days after planting
Larkspur1 per sq ft—Direct sow—Apr 17–Apr 24~95 days after direct-sowing
Hollyhock~4 sq ft each—Direct sow—May 1–May 8~180 days after direct-sowing
California Poppy2 per sq ft—Direct sow—May 1–May 8~80 days after direct-sowing
Lupine~2 sq ft each—Direct sow—May 1–May 8~80 days after direct-sowing
Gladiolus2 per sq ft—Direct sow—May 1–May 8~90 days after direct-sowing
Ranunculus5 per sq ft—Direct sow—May 8–May 15~105 days after direct-sowing
Sunflower~2 sq ft each—Direct sow—May 15–May 22~80 days after direct-sowing
Dutch Iris4 per sq ft—Direct sow—May 15–May 22~210 days after direct-sowing
Nasturtium1 per sq ft—Direct sow—May 22–May 29~55 days after direct-sowing
Four O'Clock~2 sq ft each—Direct sow—May 22–May 29~70 days after direct-sowing
Verbena~2 sq ft each—Direct sow—May 22–May 29~80 days after direct-sowing
Desert Marigold1 per sq ft—Direct sow—May 22–May 29~75 days after direct-sowing
Morning Glory~4 sq ft each—Direct sow—May 29–Jun 5~75 days after direct-sowing
Dahlia1 per sq ft—Direct sow—May 29–Jun 5~90 days after direct-sowing
Lantana~4 sq ft each—Buy as a start—May 29–Jun 5~90 days after transplanting
Hyacinth Bean Vine1 per sq ft—Direct sow—Jun 5–Jun 12~90 days after direct-sowing