I would like to plant some annuals that will reseed themselves. That
sounds okay; it's how flowers reproduce naturally. BUT I live in Zone
4, so some seeds will not survive the winter.

What about marigolds? lobelia? Will these seeds survive
temps below zero F?

I'm looking for something that will be a ground cover. There are plenty
of leggy or weedy-looking wildflowers; let's try for something full and low.

Thank you,

Ted Shoemaker