Hello. I have some of these too that have self seeded. Can share how and when you collect seed. Thanks, frani

Are you asking how and when to collect seed or that you can share how and when to collect seed? I couldn't quite tell from your post.
If you wanted to know, as the bloom dry up and drop off, they leave behind a pod. Once they dry up, they split open at the tip. I just took a cup, hold it under the seed pod and shake the seeds out.

Thanks so much! Sorry I was not clear but you understood me perfectly. I want to collect the seeds. I wasn't sure if the seedlings in my garden were weeds, but decided to take a chance and let them grow. (I had planted a few nicotiana plants 2 years ago and they did not do well) What a great surprise to have these wonderful scented beauties leading up to my front door! I would also like to save seeds from my favorite heirloom tomatoes this year if anyone knows how to do that. So glad I found this site!!

For help with the tomatoes, try this forum: http://garden.org/forums/view/...

Here is a link to an article about saving tomato seeds: http://garden.org/ideas/view/R...

Thanks Patti!