My Planting Calendar

What to plant in June in Connecticut

In Connecticut (CT), June is the heart of the growing season - about 7 weeks after the last frost (April 25) and 17 weeks before the first (October 15). The state averages 173 frost-free days a year (last frost April 25, first frost October 15; USDA zones 5b, 6a, 6b, 7a).

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

Dates here come from Connecticut frost dates (last frost Apr 25, first frost Oct 15). For one crop in detail, see when to plant tomato, lettuce or garlic in Connecticut.

Peak growing seasonSow or plant: 11Start indoors: 0Harvesting: 35

Connecticut: planting activity through the year

1
24
65
78
66
11
24
34
8
2
2
0
JanFebMarAprMayJunJulAugSepOctNovDec
Frost riskFrost-free: Apr 25 – Oct 15
Bars count the vegetables, herbs and fruit with a sowing or planting window in each month, from the state’s average frost dates. 11 have one in June; the busiest month is April (78).

For fall and winter harvests (2)

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

CropWhat to doWindowThis month
Brussels SproutsStart transplants for fallJun 15 – Jul 2Opens Jun 15
RutabagaSow for a fall cropJun 29 – Jul 16Opens Jun 29

Keep sowing (succession)

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

Harvesting in June

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

Lettuce · May 11 – Jun 10Turnip · May 14 – Jun 3Rapini (Broccoli Raab) · May 14 – Jun 3Chervil · May 14 – Jun 3Beet · May 17 – Jun 6Kohlrabi · May 19 – Jun 3Kale · May 24 – Jun 8Cilantro / Coriander · May 26 – Jun 20Green Onion / Scallion · May 27 – Jun 16Collard Greens · May 29 – Jun 18Swiss Chard · May 31 – Jun 10Napa Cabbage · May 31 – Jun 25Watercress · May 31 – Jun 10Amaranth (Leaf) · Jun 1 – Jun 21Cabbage · Jun 3 – Jul 13Carrot · Jun 3 – Jun 23Dill · Jun 4 – Jun 24Borage · Jun 5 – Jun 25Basil · Jun 8 – Jul 8Broccoli · Jun 10 – Jul 5Cauliflower · Jun 10 – Jul 10Radicchio · Jun 10 – Jul 20Fava Bean (Broad Bean) · Jun 11 – Jun 26Zucchini / Summer Squash · Jun 16 – Jul 1Tarragon · Jun 17 – Jul 17Potato · Jun 20 – Aug 9Parsley · Jun 20 – Jul 10Bush Bean · Jun 21 – Jul 1New Zealand Spinach · Jun 21 – Jul 11Fennel (Bulb) · Jun 22 – Jul 17Summer Savory · Jun 26 – Jul 11Mint · Jun 27 – Jul 17Lemon Balm · Jun 27 – Jul 17Cucumber · Jun 28 – Jul 18Okra · Jun 28 – Jul 13

Planting dates for popular crops in Connecticut

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

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

Peak growing season: June garden jobs in Connecticut

  1. 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.
  2. 17 weeks until the average first frost (October 15). Fall crops start now: brussels sprouts, rutabaga. See the fall and winter garden guide.
  3. Check the undersides of leaves twice a week - catching pests early is most of the battle (pest identification guide).
  4. Harvest often: lettuce, turnip, rapini (broccoli raab), chervil should be coming in. Picking regularly keeps beans, squash and cucumbers producing.

USDA zone chart for Connecticut

Connecticut spans USDA zones 5b, 6a, 6b, 7a. Colder zones, usually higher or further inland, have a later last spring frost and an earlier first fall frost than the state average.

ZoneLast frostFirst frostSeason
Zone 5Apr 30Oct 5160 days
Zone 6Apr 15Oct 15185 days
Zone 7Apr 5Oct 25200 days

Questions gardeners ask

What vegetables can I plant in Connecticut in June?

11 crops have a window in June: brussels sprouts, rutabaga and more. The tables above give the exact dates for each.

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

For this year, yes - the tomato windows in Connecticut have closed. The next step is to start seeds indoors from about February 28.

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

Not too late - it's actually a little early. In Connecticut the next lettuce window opens around August 10: sow for a fall crop.

When is the first frost in Connecticut?

The statewide average first fall frost is around October 15 and the last spring frost around April 25. Your town can be a week or two either side - look yours up by ZIP code.

What can I harvest in Connecticut in June?

From plantings made on time: lettuce, turnip, rapini (broccoli raab), chervil, beet, kohlrabi, kale, cilantro / coriander, green onion / scallion, collard greens.

← May in ConnecticutJuly in Connecticut →Full-year Connecticut planting calendar →Connecticut frost dates →

What to plant in June in other states

MaineMassachusettsNew HampshireNew YorkRhode IslandVermontAlabamaAlaskaAll states →

Dates are computed from Connecticut’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.