when busy lizzies die during the summer,would the seeds grow again without having to atend to them,like just let them drop on the ground from the flowers.

the seeds will fall and may grow again but that depends on the wildlife. the birds/snails/slugs n bugs will probably eat them before they get buried in the soil, and of course you have to account for wind dispersal. thats why they're called 'annuals'. you're supposed to plant them every year.

No,afraid not,they only grow once,they are called annuals.

During the early summer we remove the seeds before they swell up but during the end of the summer when the weather will kill them off anyway, we let the seed heads swell really large then go round and pop them into a paper bag. If you have a greenhouse or hot house you can use these seeds and they will grow, but very rarely in UK would they survive if just left out in the garden.

Yes, but it will grow too slowly outdoors.

It is better to take the seed pods indoors, squeeze them and the seed will come out. Keep the seed in an envelope and start it off in some compost indoors next year.

They grow pretty easy.

Busy Lizzies are very difficult to grow from seed, however I have had a couple seed themselves the following year. But the answer is no, buy new next year.