Cold resistant plants?

Cold resistant plants?

I was sorting my seed packs out and noticed that peas, lettuce and other things say "plant in early spring." Does that mean they'll be ok if we get a couple of frosts or do I need to wait and plant them with things that say "after last frost?" I've never grown most of this stuff before so I'm a little lost. I'm eager to get things into the ground straight away but I will cry if everything dies if we get a cold snap. We live in Zone 7.
Mr. Hummingbird visiting my lantana

Mr. Hummingbird visiting my lantana

Asking manufacturers for free samples

Asking manufacturers for free samples

In the garden again!

In the garden again!

Newbie

Newbie

Plant id help, please :)

Plant id help, please :)

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