Zone 4B — June
What to Plant in June in Zone 4B
June in Zone 4B:
0 crops to start indoors,
12 to plant or direct sow outside, and
90 entering harvest window.
Last frost averages May 11. Reference city: Duluth, MN.
0 Start Indoors
12 Plant Outside
90 Harvest
Start Indoors in June
Nothing to start seeds indoors in June for Zone 4B.
Next window: February — 2 varieties, including King Richard Leek, Viola and pansy edible flowers.
Plant Outside in June
| Plant | Type | Action | Target Date | Harvest Window |
|---|---|---|---|---|
| Banana Peppers | pepper | Transplant | Jun 1 | Aug 12 |
| Big Bertha Peppers | pepper | Transplant | Jun 1 | Aug 10 – Aug 13 |
| California Wonder Peppers | pepper | Transplant | Jun 1 | Aug 12 – Aug 15 |
| Carmen Peppers | pepper | Transplant | Jun 1 | Jul 31 – Aug 20 |
| Cubanelle Peppers | pepper | Transplant | Jun 1 | Aug 2 – Aug 10 |
| Dwarf Long Pod Okra | vegetable | Direct Sow | Jun 1 | Jul 26 – Jul 31 |
| Gypsy Peppers | pepper | Transplant | Jun 1 | Jul 31 – Aug 5 |
| Jimmy Nardello Peppers | pepper | Transplant | Jun 1 | Aug 20 – Aug 30 |
| King Arthur Peppers | pepper | Transplant | Jun 1 | Jul 30 |
| Lunchbox Mini Peppers | pepper | Transplant | Jun 1 | Jul 26 – Jul 31 |
| Padron Peppers | pepper | Transplant | Jun 1 | Jul 31 |
| Shishito Peppers | pepper | Transplant | Jun 1 | Jul 31 – Aug 5 |
Harvest in June
| Plant | Type | Planted / Sown | Harvest Window |
|---|---|---|---|
| Bouquet Dill | herb | Apr 27 | Jun 16 – Jul 1 |
| Charleston Wakefield Cabbage | brassica | Apr 20 | Jun 29 |
| Di Cicco Broccoli | brassica | Apr 27 | Jun 11 – Jun 14 |
| Dukat Dill | herb | Apr 27 | Jun 6 – Jun 16 |
| Early Jersey Wakefield Cabbage | brassica | Apr 20 | Jun 24 – Jul 4 |
| Fenugreek | herb | Apr 27 | Jun 1 – Jun 16 |
| King Richard Leek | allium | Apr 13 | Jun 27 |
| Mammoth Dill | herb | Apr 27 | Jun 11 – Jul 1 |
| Medium Red Clover Cover Crop | cover crop | Apr 27 | Jun 26 – Jul 11 |
| Michihili Cabbage | brassica | Apr 20 | Jun 29 |
| Rapeseed Cover Crop | cover crop | Apr 27 | Jun 11 – Jul 6 |
| Scarlet Flax Flowers | flower | Apr 27 | Jun 21 – Jul 6 |
| Viola and pansy edible flowers | flower | Apr 27 | Jun 26 – Jul 6 |
| Yellow Sweet Blossom Clover Cover Crop | cover crop | Apr 27 | Jun 26 – Jul 26 |
| America Spinach | lettuce | May 10 | Jun 22 – Jul 4 |
| Baby's Breath Flowers | flower | May 11 | Jun 25 – Jul 10 |
| Beauty Pink Radishes | root vegetable | May 18 | Jun 13 |
| Beauty Purple Radishes | root vegetable | May 18 | Jun 12 – Jun 17 |
| Beauty White Radishes | root vegetable | May 18 | Jun 17 – Jun 27 |
| Black Seeded Simpson Lettuce | lettuce | May 10 | Jun 24 – Jun 25 |
| Blonde de Paris Lettuce | lettuce | May 10 | Jun 29 – Jul 9 |
| Bloomsdale Longstanding Spinach | lettuce | May 10 | Jun 24 – Jul 1 |
| Bok Choy | lettuce | May 10 | Jun 24 – Jul 9 |
| Broadleaf Classic Endive | lettuce | May 10 | Jun 29 – Jul 9 |
| Buckwheat | cover crop | May 11 | Jun 10 – Jun 25 |
| Burgundy Boston Lettuce | lettuce | May 10 | Jun 29 – Jul 4 |
| Buttercrunch Lettuce | lettuce | May 10 | Jun 25 – Jul 4 |
| Butterhead Lettuce | lettuce | May 10 | Jun 29 – Jul 14 |
| Calypso Cilantro | herb | May 11 | Jun 30 – Jul 5 |
| Canary Yellow Swiss Chard | lettuce | May 10 | Jun 29 – Jul 9 |
| Champion Radishes | root vegetable | May 18 | Jun 12 – Jun 17 |
| Cherry Belle Radish | root vegetable | May 18 | Jun 12 |
| Chinese Broccoli (Gai Lan) | brassica | May 10 | Jun 9 – Jun 29 |
| Dill | herb | May 11 | Jun 20 – Jul 5 |
| Dutch Lamb's Lettuce | lettuce | May 10 | Jun 19 – Jun 29 |
| Dwarf Jewel Mix Nasturtium Flowers | flower | May 11 | Jun 30 – Jul 10 |
| Dwarf Siberian Kale | lettuce | May 10 | Jun 29 – Jul 4 |
| Easter Egg Radishes | root vegetable | May 18 | Jun 15 – Jun 19 |
| Endive / Escarole | lettuce | May 10 | Jun 24 – Jul 14 |
| Fairy Dwarf Mix Candytuft Flowers | flower | May 4 | Jun 18 – Jun 28 |
| Florida Broadleaf Mustard | lettuce | May 10 | Jun 19 – Jun 29 |
| Fordhook Giant Swiss Chard | lettuce | May 10 | Jun 24 – Jul 4 |
| French Breakfast Radish | root vegetable | May 18 | Jun 8 |
| French Lamb's Lettuce | lettuce | May 10 | Jun 19 – Jun 29 |
| Giant Red Mustard | lettuce | May 10 | Jun 24 |
| Green Ice Lettuce | lettuce | May 10 | Jun 24 |
| Green Mountain Celtuce | lettuce | May 10 | Jun 29 |
| Green Purslane | vegetable | May 18 | Jun 22 – Jul 7 |
| Green Wave Mustard | lettuce | May 10 | Jun 24 |
| Hailstone Radishes | root vegetable | May 18 | Jun 17 |
| Hot Pink Swiss Chard | lettuce | May 10 | Jun 29 – Jul 9 |
| Lacy Phacelia Flowers | flower | May 11 | Jun 25 – Jul 10 |
| Leaf Lettuce Mix | lettuce | May 10 | Jun 24 – Jul 4 |
| Little Gem Lettuce | lettuce | May 10 | Jun 29 – Jul 5 |
| Lollo Bionda Lettuce | lettuce | May 10 | Jun 29 – Jul 9 |
| Marvel of Four Seasons Lettuce | lettuce | May 10 | Jun 24 – Jul 9 |
| Matador Viking Spinach | lettuce | May 10 | Jun 24 – Jun 27 |
| Mizuna | lettuce | May 10 | Jun 19 – Jun 29 |
| Monstrueux de Viroflay Spinach | lettuce | May 10 | Jun 24 – Jun 29 |
| Mustard Greens | lettuce | May 10 | Jun 14 – Jun 29 |
| Nasturtium | flower | May 11 | Jun 30 – Jul 15 |
| New Zealand Spinach | lettuce | May 10 | Jun 29 – Jul 9 |
| Noble Giant Spinach | lettuce | May 10 | Jun 25 – Jun 29 |
| Old Fashion Mustard | lettuce | May 10 | Jun 24 – Jun 29 |
| Orange Swiss Chard | lettuce | May 10 | Jun 24 – Jul 4 |
| Peach Melba Nasturtium Flowers | flower | May 11 | Jun 30 – Jul 10 |
| Phacelia cover crop and bee forage | cover crop | May 11 | Jun 25 – Jul 10 |
| Premier Kale | lettuce | May 10 | Jun 29 – Jul 9 |
| Purple Plum Radishes | root vegetable | May 18 | Jun 15 – Jun 17 |
| Rainbow Mix Swiss Chard | lettuce | May 10 | Jun 29 – Jul 9 |
| Red Leaf Lettuce | lettuce | May 10 | Jun 24 – Jul 4 |
| Red Orach | lettuce | May 10 | Jun 24 |
| Red Russian Kale | lettuce | May 10 | Jun 19 – Jun 29 |
| Royal Carpet Alyssum Flowers | flower | May 4 | Jun 18 – Jul 3 |
| Salad Bowl Green Lettuce | lettuce | May 10 | Jun 28 – Jun 29 |
| Shungiku (Edible Chrysanthemum) | lettuce | May 10 | Jun 19 – Jul 4 |
| Slow-Bolt (Slo-Bolt) Cilantro/Coriander | herb | May 11 | Jun 8 – Jun 20 |
| Sparkler Radishes | root vegetable | May 18 | Jun 12 – Jun 17 |
| Swiss Chard | lettuce | May 10 | Jun 29 – Jul 9 |
| Tango Lettuce | lettuce | May 10 | Jun 25 |
| Tatsoi | lettuce | May 10 | Jun 4 – Jun 24 |
| Tendergreen Mustard | lettuce | May 10 | Jun 19 – Jun 29 |
| Tom Thumb Lettuce | lettuce | May 10 | Jun 29 – Jul 19 |
| Tri Color Amaranth (Joseph's Coat) | vegetable | May 18 | Jun 17 – Jul 2 |
| Vates Kale | lettuce | May 10 | Jun 29 – Jul 4 |
| Whirlybird Nasturtium Flowers | flower | May 11 | Jun 30 – Jul 10 |
| White Boston Lettuce | lettuce | May 10 | Jun 19 – Jun 29 |
| White Icicle Radishes | root vegetable | May 18 | Jun 17 |
| Winner Kohlrabi | brassica | May 10 | Jun 24 – Jun 29 |
| Winter Giant Spinach | lettuce | May 10 | Jun 24 – Jun 29 |
Key Tasks for June in Zone 4B
- 1 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.
- 2 Direct sow seeds at the recommended depth and spacing. Keep the seedbed consistently moist until germination is complete.
- 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.
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