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Zone 4B — April

What to Plant in April in Zone 4B

April in Zone 4B: 229 crops to start indoors, 69 to plant or direct sow outside, and 0 entering harvest window. Last frost averages May 11. Reference city: Duluth, MN.
Updated August 12, 2026 · Frost data from NOAA 1991-2020 Climate Normals
229 Start Indoors
69 Plant Outside
0 Harvest
Frost window: Active

This is when frost can still happen in Zone 4B. The last spring frost typically lands on May 11, with a 10% chance of frost as late as May 25. Plan transplants with this window in mind.

See full Zone 4B frost outlook →

Start Indoors in April

Plant Type Start Indoors Transplant Outside Harvest Window
Alaska Early Pea legume Apr 13 Apr 20 Jun 14 – Jun 19
All Season Cabbage brassica Apr 13 Apr 27 Jul 6 – Jul 16
All Year Round Cauliflower brassica Apr 13 Apr 27 Jul 1
Berry Blue honeyberry shrubs berry Apr 27 Apr 27 Perennial — see plant page
Black Salsify root vegetable Apr 6 Apr 13 Perennial — see plant page
Blue Flax Flowers flower Apr 20 Apr 27 Perennial — see plant page
Bouquet Dill herb Apr 20 Apr 27 Jun 16 – Jul 1
Broad Windsor Fava Bean legume Apr 13 Apr 20 Jul 4 – Jul 14
Brunswick Cabbage brassica Apr 13 Apr 27 Jul 16 – Jul 26
Calabrese Broccoli brassica Apr 13 Apr 27 Jul 1
Carentan Leeks allium Apr 6 Apr 27 Jul 26 – Aug 15
Cascadia Sugar Snap Pea legume Apr 13 Apr 20 Jun 24 – Jun 26
Charleston Wakefield Cabbage brassica Apr 6 Apr 20 Jul 4
Chervil herb Apr 13 Apr 20 May 25 – Jun 4
Chinese Forget-Me-Not Flowers flower Apr 20 Apr 27 Jul 1 – Jul 21
Copenhagen Cabbage brassica Apr 13 Apr 27 Jul 1
Crimson Cherry Rhubarb Root vegetable Apr 6 Apr 13 Perennial — see plant page
Dandelion herb Apr 13 Apr 20 Perennial — see plant page
Danish Ballhead Cabbage brassica Apr 13 Apr 27 Aug 5 – Aug 15
Delicatesse Blue Kohlrabi brassica Apr 13 Apr 20 Jun 14 – Jun 19
Delicatesse White Kohlrabi brassica Apr 13 Apr 20 Jun 14 – Jun 19
Di Cicco Broccoli brassica Apr 13 Apr 27 Jul 1
Drumhead Cabbage brassica Apr 13 Apr 27 Jul 26 – Aug 5
Dukat Dill herb Apr 20 Apr 27 Jun 6 – Jun 16
Dutch Yellow Shallots allium Apr 6 Apr 13 Jul 12 – Aug 11
Early Jersey Wakefield Cabbage brassica Apr 6 Apr 20 Jun 24 – Jul 4
Early Purple Broccoli brassica Apr 13 Apr 27 Jul 1
Evergreen Parsley herb Apr 20 Apr 27 Jul 6 – Jul 21
Fenugreek herb Apr 20 Apr 27 Jun 1 – Jun 16
French Red Shallots allium Apr 6 Apr 13 Jul 12 – Aug 11
Giant Imperial Mix Larkspur Flowers flower Apr 13 Apr 20 Jul 29 – Aug 18
Giant Musselburgh Leeks allium Apr 6 Apr 27 Aug 5 – Aug 10
Glory of Enkhuizen Cabbage brassica Apr 13 Apr 27 Jul 26
Golden Acre Cabbage brassica Apr 13 Apr 27 Jul 1
Green Arrow Pea legume Apr 13 Apr 20 Jun 24 – Jun 29
Hamburg Rooted Parsley herb Apr 20 Apr 27 Jul 26 – Aug 15
Hard Red Wheat Cover Crop cover crop Apr 13 Apr 20 Jul 4 – Jul 24
Holland Red Shallots allium Apr 6 Apr 13 Jul 12 – Aug 11
Honeycrisp apple trees berry Apr 27 Apr 27 Perennial — see plant page
Igloo Cauliflower brassica Apr 13 Apr 27 Jul 1 – Jul 6
Invicta gooseberry shrubs berry Apr 27 Apr 27 Perennial — see plant page
Little Marvel Pea legume Apr 13 Apr 20 Jun 19 – Jun 22
Mammoth Dill herb Apr 20 Apr 27 Jun 11 – Jul 1
Mammoth Melting Sugar Snow Pea legume Apr 13 Apr 20 Jun 27 – Jul 3
Mary Washington Asparagus vegetable Apr 20 Apr 27 Perennial — see plant page
Medium Red Clover Cover Crop cover crop Apr 20 Apr 27 Jun 26 – Jul 11
Michihili Cabbage brassica Apr 6 Apr 20 Jun 29
Millennium Asparagus vegetable Apr 20 Apr 27 Perennial — see plant page
OG American Flag Leeks allium Apr 6 Apr 27 Jul 26 – Aug 5
Oregon Giant Snow Pea legume Apr 13 Apr 20 Jun 29 – Jul 3
Oregon Sugar Pod Snow Pea legume Apr 13 Apr 20 Jun 19 – Jun 27
Progress No. 9 Shelling Pea legume Apr 13 Apr 20 Jun 17 – Jun 21
Purple Passion Asparagus vegetable Apr 20 Apr 27 Perennial — see plant page
Rapeseed Cover Crop cover crop Apr 20 Apr 27 Jun 11 – Jul 6
Rapini Broccoli Raab brassica Apr 20 Apr 27 Jul 1
Red Acre Cabbage brassica Apr 6 Apr 20 Jul 4 – Jul 9
Red Lake currant shrubs berry Apr 27 Apr 27 Perennial — see plant page
Savoy Perfection Cabbage brassica Apr 13 Apr 27 Jul 26 – Jul 31
Scarlet Flax Flowers flower Apr 20 Apr 27 Jun 21 – Jul 6
Shungiku (Edible Chrysanthemum) lettuce Apr 20 Apr 27 Jun 6 – Jun 21
Snowball Self-Blanche Cauliflower brassica Apr 13 Apr 27 Jul 1
Sugar Ann Snap Pea legume Apr 13 Apr 20 Jun 11 – Jun 15
Victoria Rhubarb vegetable Apr 6 Apr 27 Perennial — see plant page
Vienna Purple Kohlrabi brassica Apr 13 Apr 20 Jun 14 – Jun 24
Vienna White Kohlrabi brassica Apr 13 Apr 20 Jun 24
Violetta Purple Cauliflower brassica Apr 13 Apr 27 Jul 1
Wando Pea legume Apr 13 Apr 20 Jun 22 – Jun 27
Yellow Sweet Blossom Clover Cover Crop cover crop Apr 20 Apr 27 Jun 26 – Jul 26
African Flake Daisy Flowers flower Apr 27 May 11 Aug 9 – Aug 19
Aji Amarillo Peppers pepper Apr 20 May 25 Aug 23 – Sep 22
Aji Dulce Peppers pepper Apr 20 May 25 Aug 23 – Sep 12
Alexandria Alpine Strawberry berry Apr 6 May 18 Perennial — see plant page
Alfalfa Cover Crop cover crop Apr 27 May 4 Perennial — see plant page
Amish Paste Tomatoes tomato Apr 27 May 25 Aug 7 – Aug 18
Anaheim Peppers pepper Apr 20 May 25 Aug 10 – Aug 18
Ancho Grande Hot Peppers pepper Apr 27 May 25 Aug 8 – Aug 18
Angelica herb Apr 13 May 11 Jul 30 – Aug 9
Baby's Breath Flowers flower Apr 20 May 11 Perennial — see plant page
Barletta, Pearly White Onions root vegetable Apr 13 May 11 Jul 25 – Jul 30
Bhut Jolokia Ghost Pepper pepper Apr 20 May 25 Aug 23 – Sep 22
Big Jim Hatch Chile pepper Apr 20 May 25 Aug 3 – Aug 8
Birds Eye Hot Peppers pepper Apr 27 May 25 Sep 2 – Sep 12
Black Beauty Zucchini squash Apr 24 May 22 Jul 6 – Jul 16
Black Cherry Tomatoes tomato Apr 27 May 25 Jul 28 – Aug 8
Butternut Squash squash Apr 27 May 25 Sep 2 – Sep 22
Cantaloupe melon Apr 27 May 25 Aug 13 – Aug 23
Caribbean Red Scotch Bonnet Pepper pepper Apr 20 May 25 Aug 28 – Sep 22
Carolina Reaper peppers pepper Apr 13 May 25 Aug 23 – Sep 22
Casper Eggplant vegetable Apr 27 May 25 Aug 3
Catmint herb Apr 20 May 11 Perennial — see plant page
Cayenne Peppers pepper Apr 20 May 25 Aug 18 – Aug 28
Cherry Bomb peppers pepper Apr 13 May 25 Aug 8 – Aug 13
Chinese 5-Color Peppers pepper Apr 20 May 25 Aug 8 – Aug 18
Chocolate Bell Sweet Peppers pepper Apr 27 May 25 Jul 29 – Aug 13
Chocolate Habanero Hot Peppers pepper Apr 27 May 25 Aug 18 – Sep 7
Classic Tomatillos vegetable Apr 27 May 18 Aug 6 – Aug 11
Common Milkweed Flowers flower Apr 27 May 4 Perennial — see plant page
Common Sage herb Apr 20 May 18 Perennial — see plant page
Corno di Toro Pepper pepper Apr 20 May 25 Aug 8 – Aug 13
Crackerjack Mix Marigolds flower Apr 20 May 11 Jul 10 – Jul 25
Crego Mix Aster Flowers flower Apr 27 May 18 Aug 6 – Aug 16
Crimson Forest Bunching Onions root vegetable Apr 20 May 11 Jul 10
Curly Parsley herb Apr 6 May 11 Jul 20 – Jul 30
Dark Opal Basil herb Apr 27 May 25 Jul 24 – Aug 8
Datil peppers pepper Apr 13 May 25 Aug 23 – Sep 12
Devils Tongue Yellow Hot Peppers pepper Apr 27 May 25 Aug 23 – Sep 12
Dolce Fresca Basil herb Apr 27 May 25 Jul 24 – Aug 3
Emerald Giant Sweet Peppers pepper Apr 27 May 25 Aug 8 – Aug 18
English Lavender herb Apr 20 May 25 Perennial — see plant page
English Thyme herb Apr 13 May 11 Perennial — see plant page
English White Daisy Flowers flower Apr 13 May 11 Perennial — see plant page
Evergreen Bunching Onions root vegetable Apr 20 May 11 Sep 8
Fairy Dwarf Mix Candytuft Flowers flower Apr 27 May 4 Jun 18 – Jul 3
Firecracker Hot Peppers pepper Apr 27 May 25 Aug 13 – Sep 22
Fish Peppers pepper Apr 20 May 25 Aug 3 – Aug 13
Flat-Leaf Parsley herb Apr 6 May 11 Jul 20 – Aug 9
Florida Market Eggplant vegetable Apr 27 May 25 Aug 13 – Aug 23
Foxglove Flowers flower Apr 27 May 4 Perennial — see plant page
Fresno Peppers pepper Apr 20 May 25 Aug 8 – Aug 13
Genovese Basil herb Apr 27 May 25 Jul 24 – Aug 3
Giant Maximum Mix Snapdragon Flowers flower Apr 13 May 11 Jul 30 – Aug 14
Gochugaru Korean Peppers pepper Apr 20 May 25 Aug 8
Golden Celery vegetable Apr 13 May 18 Aug 11 – Aug 21
Golden Marconi Sweet Peppers pepper Apr 27 May 25 Jul 29 – Aug 13
Grano Red Onions root vegetable Apr 13 May 11 Sep 8
Grano White Onions root vegetable Apr 13 May 11 Sep 8
Green Globe Artichoke vegetable Apr 20 May 25 Perennial — see plant page
Green shiso leaves herb Apr 27 May 18 Jul 17 – Jul 27
Hatch Green Chile (NM 6-4) Peppers pepper Apr 20 May 25 Aug 3 – Aug 13
Highbush Blueberries berry Apr 27 May 25 Perennial — see plant page
Holiday Marbles Hot Peppers pepper Apr 27 May 25 Aug 23 – Sep 12
Hungarian Hot Wax Pepper pepper Apr 20 May 25 Jul 29 – Aug 8
Imperial Star Artichoke vegetable Apr 6 May 11 Aug 9 – Aug 19
Isis Candy Cherry Tomatoes tomato Apr 20 May 18 Jul 27 – Aug 6
Jalapeño Peppers pepper Apr 20 May 25 Jul 29 – Aug 8
Kapoor Tulsi (Holy Basil) herb Apr 27 May 25 Jul 24
Kellogg's Breakfast tomatoes tomato Apr 20 May 18 Aug 1 – Aug 11
King's Cure-All Evening Primrose Flowers flower Apr 27 May 4 Perennial — see plant page
Lemon Habanero Hot Peppers pepper Apr 27 May 25 Aug 18 – Sep 7
Lemongrass herb Apr 20 May 25 Perennial — see plant page
Long Green Louisiana Eggplant vegetable Apr 27 May 25 Jul 29 – Aug 3
Long Ping Tung Eggplant vegetable Apr 27 May 25 Jul 19 – Jul 24
Long Purple Italian Eggplant vegetable Apr 27 May 25 Aug 8
Lunaria Silver Dollar Flowers flower Apr 27 May 4 Perennial — see plant page
Mariachi Peppers pepper Apr 20 May 25 Jul 30 – Aug 8
Marketmore 76 Cucumber cucumber Apr 27 May 25 Jul 22 – Aug 1
Matt's Wild Cherry Tomatoes tomato Apr 20 May 18 Jul 12 – Jul 22
Midnight Snack Tomatoes tomato Apr 27 May 25 Jul 29 – Aug 3
Mrs. Burns Lemon Basil herb Apr 20 May 18 Jul 17 – Jul 27
Mucho Nacho Jalapeño Peppers pepper Apr 27 May 25 Aug 1 – Aug 3
Napoletano Basil herb Apr 27 May 25 Aug 8
New England Aster Flowers flower Apr 27 May 4 Perennial — see plant page
NuMex Twilight Hot Peppers pepper Apr 27 May 25 Aug 23 – Sep 22
Orange Habanero Hot Peppers pepper Apr 27 May 25 Aug 18 – Sep 7
Orange Horizon Sweet Peppers pepper Apr 27 May 25 Aug 8 – Aug 13
Orion Florence Fennel vegetable Apr 27 May 18 Aug 6 – Aug 16
Ox-Eye Daisy Flowers flower Apr 13 May 11 Perennial — see plant page
Pandora Striped Eggplant vegetable Apr 27 May 25 Aug 8 – Aug 13
Pasilla de Oaxaca Hot Peppers pepper Apr 27 May 25 Aug 8 – Aug 18
Paul Robeson tomatoes tomato Apr 20 May 18 Jul 27 – Aug 11
Pepperoncini Pepper pepper Apr 27 May 25 Jul 29 – Aug 8
Pesto Perpetuo Basil herb Apr 27 May 25 Jul 24 – Aug 23
Pimento Sweet Peppers pepper Apr 27 May 25 Aug 18 – Aug 23
Pineapple Tomatillos vegetable Apr 27 May 18 Jul 27 – Aug 6
Pistou Basil herb Apr 27 May 25 Jul 24
Poblano Peppers pepper Apr 20 May 25 Jul 29 – Aug 8
Powderpuff Aster Flowers flower Apr 27 May 18 Aug 1 – Aug 11
Pretty Purple Hot Peppers pepper Apr 27 May 25 Aug 23 – Sep 22
Purple Basil herb Apr 27 May 25 Aug 3 – Aug 18
Purple Beauty Sweet Peppers pepper Apr 27 May 25 Aug 3 – Aug 8
Purple Tiger Hot Peppers pepper Apr 27 May 25 Aug 23 – Sep 2
Purple Tomatillos vegetable Apr 27 May 18 Aug 1 – Aug 11
Red Burgundy Onions root vegetable Apr 13 May 11 Aug 29 – Sep 8
Red Caribbean Habanero Hot Peppers pepper Apr 27 May 25 Aug 18 – Sep 7
Red Cayenne Hot Peppers pepper Apr 27 May 25 Aug 8 – Aug 18
Red Cherry Hot Peppers pepper Apr 27 May 25 Aug 8 – Aug 18
Red Mushroom Hot Peppers pepper Apr 27 May 25 Aug 8 – Aug 18
Red Robin Tomatoes tomato Apr 27 May 25 Jul 19
Red Rubin Basil herb Apr 27 May 25 Aug 5
Round Mauve Eggplant vegetable Apr 27 May 25 Aug 13 – Aug 23
Royal Carpet Alyssum Flowers flower Apr 27 May 4 Jun 18 – Jul 3
Rutgers Tomato tomato Apr 27 May 25 Aug 3 – Aug 13
Salad Burnet herb Apr 27 May 4 Perennial — see plant page
Santa Fe Grande Hot Peppers pepper Apr 27 May 25 Aug 8 – Aug 13
Scarlet Sage Flowers flower Apr 27 May 18 Perennial — see plant page
Serrano Peppers pepper Apr 20 May 25 Aug 3 – Aug 13
Shasta Daisy Flowers flower Apr 6 May 11 Perennial — see plant page
Single Mix China Aster Flowers flower Apr 27 May 18 Jul 27 – Aug 6
Smooth Blue Aster Flowers flower Apr 27 May 4 Perennial — see plant page
Soapwort flower Apr 27 May 18 Perennial — see plant page
Southport Red Globe Onions root vegetable Apr 13 May 11 Sep 8
Southport White Globe Onions root vegetable Apr 13 May 11 Sep 8
Spanish Sweet White Onions root vegetable Apr 13 May 11 Aug 29 – Sep 8
Sparky Mix Marigolds flower Apr 20 May 11 Jul 5 – Jul 20
Spicy Globe Basil herb Apr 27 May 25 Aug 3
Sugar Baby Watermelon melon Apr 27 May 25 Aug 8 – Aug 13
Sunbright Yellow Sweet Peppers pepper Apr 27 May 25 Aug 8 – Aug 13
Sweet Marjoram herb Apr 20 May 18 Aug 1 – Aug 16
Sweet Million Tomatoes tomato Apr 27 May 25 Jul 24 – Jul 29
Sweet Woodruff herb Apr 20 May 11 Perennial — see plant page
Tabasco Hot Peppers pepper Apr 27 May 25 Aug 13 – Aug 23
Tansy herb Apr 20 May 11 Perennial — see plant page
Tendercrisp Celery vegetable Apr 13 May 18 Aug 11 – Aug 26
Thai Basil herb Apr 27 May 25 Jul 24 – Jul 29
Thai Hot Peppers pepper Apr 20 May 25 Aug 8 – Aug 18
Tiny Tim Tomatoes tomato Apr 27 May 25 Jul 9 – Jul 19
Trinidad Moruga Scorpion peppers pepper Apr 13 May 25 Aug 13 – Sep 22
Tropical Milkweed Flowers flower Apr 20 May 18 Perennial — see plant page
Tumbling Tom Red Tomatoes tomato Apr 27 May 25 Jul 29 – Aug 3
Turkish Orange Eggplant vegetable Apr 27 May 25 Aug 18 – Aug 23
Verde Tomatillos vegetable Apr 27 May 18 Aug 1 – Aug 11
White Cloud Sweet Peppers pepper Apr 27 May 25 Aug 3 – Aug 8
White Lisbon Bunching Onions root vegetable Apr 20 May 11 Jul 15
Wormwood herb Apr 20 May 11 Perennial — see plant page
Yellow Jalapeno (Caloro) Hot Peppers pepper Apr 27 May 25 Aug 8 – Aug 18
Yellow Mushroom Hot Peppers pepper Apr 27 May 25 Aug 8 – Aug 18
Yellow Scotch Bonnet Hot Peppers pepper Apr 27 May 25 Aug 23 – Sep 22
Yolo Wonder Sweet Peppers pepper Apr 27 May 25 Aug 3 – Aug 13
Banana Peppers pepper Apr 27 Jun 1 Jul 31 – Aug 10
Big Bertha Peppers pepper Apr 27 Jun 1 Aug 10 – Aug 13
California Wonder Peppers pepper Apr 27 Jun 1 Aug 12 – Aug 15
Carmen Peppers pepper Apr 27 Jun 1 Jul 31 – Aug 20
Cubanelle Peppers pepper Apr 27 Jun 1 Aug 2 – Aug 10
Gypsy Peppers pepper Apr 27 Jun 1 Jul 31 – Aug 5
Jimmy Nardello Peppers pepper Apr 27 Jun 1 Aug 20 – Aug 30
King Arthur Peppers pepper Apr 27 Jun 1 Aug 2 – Aug 8
Lunchbox Mini Peppers pepper Apr 27 Jun 1 Jul 26 – Jul 31
Padron Peppers pepper Apr 27 Jun 1 Jul 31 – Aug 5
Shishito Peppers pepper Apr 27 Jun 1 Jul 31 – Aug 5

Plant Outside in April

Plant Type Action Target Date Harvest Window
Alaska Early Pea legume Transplant Apr 20 Jun 14 – Jun 19
All Season Cabbage brassica Transplant Apr 27 Jul 6 – Jul 16
All Year Round Cauliflower brassica Transplant Apr 27 Jul 1
Berry Blue honeyberry shrubs berry Transplant Apr 27 Perennial — see plant page
Black Salsify root vegetable Transplant Apr 13 Perennial — see plant page
Blue Flax Flowers flower Transplant Apr 27 Perennial — see plant page
Bouquet Dill herb Transplant Apr 27 Jun 16 – Jul 1
Broad Windsor Fava Bean legume Transplant Apr 20 Jul 4 – Jul 14
Brunswick Cabbage brassica Transplant Apr 27 Jul 16 – Jul 26
Calabrese Broccoli brassica Transplant Apr 27 Jul 1
Carentan Leeks allium Transplant Apr 27 Jul 26 – Aug 15
Cascadia Sugar Snap Pea legume Transplant Apr 20 Jun 24 – Jun 26
Charleston Wakefield Cabbage brassica Transplant Apr 20 Jul 4
Chervil herb Transplant Apr 20 May 25 – Jun 4
Chinese Forget-Me-Not Flowers flower Transplant Apr 27 Jul 1 – Jul 21
Copenhagen Cabbage brassica Transplant Apr 27 Jul 1
Crimson Cherry Rhubarb Root vegetable Transplant Apr 13 Perennial — see plant page
Dandelion herb Transplant Apr 20 Perennial — see plant page
Danish Ballhead Cabbage brassica Transplant Apr 27 Aug 5 – Aug 15
Delicatesse Blue Kohlrabi brassica Transplant Apr 20 Jun 14 – Jun 19
Delicatesse White Kohlrabi brassica Transplant Apr 20 Jun 14 – Jun 19
Di Cicco Broccoli brassica Transplant Apr 27 Jul 1
Drumhead Cabbage brassica Transplant Apr 27 Jul 26 – Aug 5
Dukat Dill herb Transplant Apr 27 Jun 6 – Jun 16
Dutch Yellow Shallots allium Transplant Apr 13 Jul 12 – Aug 11
Early Jersey Wakefield Cabbage brassica Transplant Apr 20 Jun 24 – Jul 4
Early Purple Broccoli brassica Transplant Apr 27 Jul 1
Evergreen Parsley herb Transplant Apr 27 Jul 6 – Jul 21
Fenugreek herb Transplant Apr 27 Jun 1 – Jun 16
French Red Shallots allium Transplant Apr 13 Jul 12 – Aug 11
Giant Imperial Mix Larkspur Flowers flower Transplant Apr 20 Jul 29 – Aug 18
Giant Musselburgh Leeks allium Transplant Apr 27 Aug 5 – Aug 10
Glory of Enkhuizen Cabbage brassica Transplant Apr 27 Jul 26
Golden Acre Cabbage brassica Transplant Apr 27 Jul 1
Green Arrow Pea legume Transplant Apr 20 Jun 24 – Jun 29
Hamburg Rooted Parsley herb Transplant Apr 27 Jul 26 – Aug 15
Hard Red Wheat Cover Crop cover crop Transplant Apr 20 Jul 4 – Jul 24
Holland Red Shallots allium Transplant Apr 13 Jul 12 – Aug 11
Honeycrisp apple trees berry Transplant Apr 27 Perennial — see plant page
Igloo Cauliflower brassica Transplant Apr 27 Jul 1 – Jul 6
Invicta gooseberry shrubs berry Transplant Apr 27 Perennial — see plant page
Little Marvel Pea legume Transplant Apr 20 Jun 19 – Jun 22
Mammoth Dill herb Transplant Apr 27 Jun 11 – Jul 1
Mammoth Melting Sugar Snow Pea legume Transplant Apr 20 Jun 27 – Jul 3
Mary Washington Asparagus vegetable Transplant Apr 27 Perennial — see plant page
Medium Red Clover Cover Crop cover crop Transplant Apr 27 Jun 26 – Jul 11
Michihili Cabbage brassica Transplant Apr 20 Jun 29
Millennium Asparagus vegetable Transplant Apr 27 Perennial — see plant page
OG American Flag Leeks allium Transplant Apr 27 Jul 26 – Aug 5
Oregon Giant Snow Pea legume Transplant Apr 20 Jun 29 – Jul 3
Oregon Sugar Pod Snow Pea legume Transplant Apr 20 Jun 19 – Jun 27
Progress No. 9 Shelling Pea legume Transplant Apr 20 Jun 17 – Jun 21
Purple Passion Asparagus vegetable Transplant Apr 27 Perennial — see plant page
Rapeseed Cover Crop cover crop Transplant Apr 27 Jun 11 – Jul 6
Rapini Broccoli Raab brassica Transplant Apr 27 Jul 1
Red Acre Cabbage brassica Transplant Apr 20 Jul 4 – Jul 9
Red Lake currant shrubs berry Transplant Apr 27 Perennial — see plant page
Savoy Perfection Cabbage brassica Transplant Apr 27 Jul 26 – Jul 31
Scarlet Flax Flowers flower Transplant Apr 27 Jun 21 – Jul 6
Shungiku (Edible Chrysanthemum) lettuce Transplant Apr 27 Jun 6 – Jun 21
Snowball Self-Blanche Cauliflower brassica Transplant Apr 27 Jul 1
Sugar Ann Snap Pea legume Transplant Apr 20 Jun 11 – Jun 15
Victoria Rhubarb vegetable Transplant Apr 27 Perennial — see plant page
Vienna Purple Kohlrabi brassica Transplant Apr 20 Jun 14 – Jun 24
Vienna White Kohlrabi brassica Transplant Apr 20 Jun 24
Viola and pansy edible flowers flower Transplant Apr 27 Jun 26 – Jul 6
Violetta Purple Cauliflower brassica Transplant Apr 27 Jul 1
Wando Pea legume Transplant Apr 20 Jun 22 – Jun 27
Yellow Sweet Blossom Clover Cover Crop cover crop Transplant Apr 27 Jun 26 – Jul 26

Harvest in April

Nothing to harvest in April for Zone 4B.
Next window: May — 4 varieties, including Astro Arugula, Chervil, Mesclun Mix.

Key Tasks for April in Zone 4B

  1. 1 Start 229 varieties indoors this month under grow lights or in a sunny south-facing window. Use a seed-starting mix and bottom heat (70–75°F) for best germination rates.
  2. 2 Harden off transplants before moving outdoors — set them outside in a sheltered spot for increasing hours over 7–10 days before planting in the ground.
  3. 3 Check soil moisture before watering — stick a finger 2 inches into the soil. Water only when the soil is dry at that depth. Consistent moisture is more important than frequency.
Back to full Zone 4B planting calendar
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