when to put out plants

when to put out plants

i live in Ohio, and would like to know when i can safely put out my veggie and herb plants in pots on my balcony. i have no idea when frost danger has passed, or how to find out, and i don't want to kill my plants. THanks! :)
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More guessing in the garden

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Tulips

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Kentucky

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Help identifying my hanging plant

hooray!

hooray!

Plant ID

Plant ID