What Grows in Kingston, ON?
Lake Ontario moderates temperatures — slightly longer season than inland Ontario.
Zone
Last frost
First frost
Frost-free days
Kingston is in Canadian Zone 5 with about 150 frost-free days, and you can grow tomato, pepper, zucchini, bean, and more here.
Planting tips for Kingston
Lake effect extends fall harvest; great for garlic and late greens.
What to plant, and when
Timing by your frost dates — last frost May 5, first frost October 10.
Tomato, Cherry Tomato, Bell Pepper, Chili Pepper, Cucumber, Zucchini, Eggplant, Pumpkin
Lettuce, Spinach, Kale, Broccoli, Carrot, Radish, Beets, Onion
Green Beans, Potato, Sweet Potato, Corn, Microgreens, Rhubarb
Garlic
What grows well in Kingston
Tomato
Grows well
Cherry Tomato
Grows well
Bell Pepper
Grows well
Chili Pepper
Grows well
Cucumber
Grows well
Zucchini
Grows well
Green Beans
Grows well
Lettuce
Grows well
Spinach
Grows well
Kale
Grows well
Broccoli
Grows well
Carrot
Grows well
Radish
Grows well
Beets
Grows well
Onion
Grows well
Garlic
Grows well
Potato
Grows well
Sweet Potato
Grows well
Corn
Grows well
Peas
Grows well
Cabbage
Grows well
Brussels Sprouts
Grows well
Eggplant
Grows well
Swiss Chard
Grows well
Arugula
Grows well
Microgreens
Grows well
Pumpkin
Grows well
Leek
Grows well
Asparagus
Grows well
Rhubarb
Grows wellLocal favourites in Kingston: tomato, pepper, zucchini, bean, lettuce, garlic.
Frequently asked questions
What hardiness zone is Kingston, ON in?
Kingston, ON is in Canadian Hardiness Zone 5. This drives everything about what you can reliably grow — it maps directly to how cold your winters get.
When is the last frost in Kingston?
The average last spring frost in Kingston is around May 5, and the first fall frost is typically October 10. Plan to move tender plants outside after May 5 and have them harvested (or protected) before October 10.
What grows well in Kingston?
Plenty — Kingston's Canadian Zone 5 climate supports 30+ crops. Some of the easiest and most reliable here are Cherry Tomato, Chili Pepper, Cucumber.
How long is Kingston's growing season?
Kingston typically has around 150 frost-free days per year (roughly May 5 to October 10). That's a full season — plenty of time for most annual vegetables plus a succession or fall crop of cool-season greens.
What should I plant first in Kingston?
Go with fast-maturing crops to get a quick win while the season is short: Microgreens, Arugula, Radish are among the quickest from seed to harvest in Kingston.
Can I grow vegetables in containers in Kingston?
Yes — Kingston's climate is container-friendly for the right crops. Tomato, Cherry Tomato, Bell Pepper all do well in pots, which also lets you start them a little earlier and move them in on cold nights.
When should I start seeds indoors in Kingston?
For warm-season crops like Tomato, Cherry Tomato, Bell Pepper, start seeds indoors 6–8 weeks before your last frost (around May 5), then transplant after the danger of frost has passed.