What to plant in June in Delaware

In Delaware (DE), June is the heart of the growing season - about 9 weeks after the last frost (April 14) and 18 weeks before the first (October 22). The state averages 191 frost-free days a year (last frost April 14, first frost October 22; USDA zones 7a, 7b).

10 crops have a sowing or planting window this month, including brussels sprouts.

Dates here come from Delaware frost dates (last frost Apr 14, first frost Oct 22). For one crop in detail, see when to plant tomato, lettuce or garlic in Delaware.

Peak growing seasonSow or plant: 10Start indoors: 0Harvesting: 43

Delaware: planting activity through the year

JanFebMarAprMayJunJulAugSepOctNovDec

Frost riskFrost-free: Apr 14 – Oct 22

Bars count the vegetables, herbs and fruit with a sowing or planting window in each month, from the state’s average frost dates. 10 have one in June; the busiest month is April (89).

For fall and winter harvests (1)

Sowings counted back from Delaware's first fall frost, so the crop matures before the cold - or, for garlic and similar, planted after it.

Crop	What to do	Window	This month
Brussels Sprouts	Start transplants for fall	Jun 22 – Jul 9	Opens Jun 22

Keep sowing (succession)

Repeat sowings of crops already in the ground, for a steady harvest instead of a glut.

Cucumber: sow again on Jun 9 and Jun 30
Zucchini / Summer Squash: sow again on Jun 16
Bush Bean: sow again on Jun 2 and Jun 16 and Jun 30
Sweet Corn: sow again on Jun 2 and Jun 16 and Jun 30
Basil: sow again on Jun 9 and Jun 30
Edamame (Soybean): sow again on Jun 2 and Jun 16 and Jun 30
Southern Pea (Cowpea): sow again on Jun 9 and Jun 23
Sunflower: sow again on Jun 2 and Jun 16 and Jun 30
Amaranth (Leaf): sow again on Jun 2 and Jun 16 and Jun 30

Harvesting in June

First harvests expected this month from crops sown or planted on time earlier in the season.

Cilantro / Coriander · May 15 – Jun 9 Green Onion / Scallion · May 16 – Jun 5 Collard Greens · May 18 – Jun 7 Napa Cabbage · May 20 – Jun 14 Amaranth (Leaf) · May 21 – Jun 10 Cabbage · May 23 – Jul 2 Carrot · May 23 – Jun 12 Dill · May 24 – Jun 13 Borage · May 25 – Jun 14 Basil · May 28 – Jun 27 Broccoli · May 30 – Jun 24 Cauliflower · May 30 – Jun 29 Radicchio · May 30 – Jul 9 Fava Bean (Broad Bean) · May 31 – Jun 15 Zucchini / Summer Squash · Jun 5 – Jun 20 Tarragon · Jun 6 – Jul 6 Potato · Jun 9 – Jul 29 Parsley · Jun 9 – Jun 29 Bush Bean · Jun 10 – Jun 20 New Zealand Spinach · Jun 10 – Jun 30 Fennel (Bulb) · Jun 11 – Jul 6 Summer Savory · Jun 15 – Jun 30 Mint · Jun 16 – Jul 6 Lemon Balm · Jun 16 – Jul 6 Cucumber · Jun 17 – Jul 7 Okra · Jun 17 – Jul 2 Tomato · Jun 20 – Jul 15 Pole Bean · Jun 20 – Jun 30 Sweet Corn · Jun 20 – Jul 30 Sweet Marjoram · Jun 20 – Jul 10 Onion · Jun 22 – Jul 22 Shallot · Jun 22 – Jul 22 Bitter Melon · Jun 22 – Jul 12 Malabar Spinach · Jun 22 – Jul 7 Endive & Escarole · Jun 24 – Jul 9 Bell Pepper · Jun 27 – Jul 27 Southern Pea (Cowpea) · Jun 27 – Jul 27 Thyme · Jun 28 – Jul 13 Sage · Jun 28 – Jul 13 Brussels Sprouts · Jun 29 – Jul 29 Ground Cherry · Jun 30 – Jul 20 Sunflower · Jun 30 – Jul 30 Shiso (Perilla) · Jun 30 – Jul 20

Planting dates for popular crops in Delaware

Every crop has its own full-year dates for Delaware: indoor start, transplant or direct sowing, and harvest.

When to plant tomato in Delaware →When to plant lettuce in Delaware →When to plant garlic in Delaware →When to plant bell pepper in Delaware →When to plant carrot in Delaware →When to plant onion in Delaware →When to plant pea in Delaware →When to plant spinach in Delaware →Delaware frost dates by zone →

Peak growing season: June garden jobs in Delaware

Water deeply two or three times a week rather than a little every day - about an inch a week, more in heat. See watering a vegetable garden.
18 weeks until the average first frost (October 22). Fall crops start now: brussels sprouts. See the fall and winter garden guide.
Check the undersides of leaves twice a week - catching pests early is most of the battle (pest identification guide).
Harvest often: cilantro / coriander, green onion / scallion, collard greens, napa cabbage should be coming in. Picking regularly keeps beans, squash and cucumbers producing.

Questions gardeners ask

What vegetables can I plant in Delaware in June?

10 crops have a window in June: brussels sprouts. The tables above give the exact dates for each.

Is it too late to plant tomatoes in Delaware in June?

For this year, yes - the tomato windows in Delaware have closed. The next step is to start seeds indoors from about February 17.

Is it too late to plant lettuce in Delaware in June?

Not too late - it's actually a little early. In Delaware the next lettuce window opens around August 17: sow for a fall crop.

When is the first frost in Delaware?

The statewide average first fall frost is around October 22 and the last spring frost around April 14. Your town can be a week or two either side - look yours up by ZIP code.

What can I harvest in Delaware in June?

From plantings made on time: cilantro / coriander, green onion / scallion, collard greens, napa cabbage, amaranth (leaf), cabbage, carrot, dill, borage, basil.

← May in Delaware July in Delaware →Full-year Delaware planting calendar →Delaware frost dates →

What to plant in June in other states

District of Columbia Maryland New Jersey Pennsylvania Virginia West Virginia Alabama Alaska All states →

Dates are computed from Delaware’s statewide average frost dates (from NOAA/NCEI climate normals) and each crop’s timing in our crop database. Your garden may be a week or two either side - for dates tuned to your ZIP code, use the planting calendar.