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Dude I'm still putting seed in the soil at this time.
You are still in time to start your tomatoes. Just start them indoors keeping them above 20 degrees so they go faster.
I like to use an old oven that I keep the light on so it holds 22C.
Pumpkins, corn, beans, summer squash, salads, green beans, melon, radishes, carrots: all these can go directly in the soil now that it's warmer at night. The reason we plant them in pots beforehand is just to speed up the process but they should still give good results.