If you are looking for the old fashion plant look for Rose Moss or Moss Rose seeds. If you are looking for the larger leafed plant that is currently fashionable I have only seen as plants.

It is too late to plant portulaca for flowers this year. You might end up with a few flowers but only until frost kills the plants. It would better to wait until December to purchase unless you find the seeds on the 10 for $1.00 racks that can appear at any time of the year.

Thank you for your follow-up. You may be interested to learn that my single portulaca seed self-sowed. I didn't have to plant seeds, since enough germinated (In zone 5b)to keep going year after year. I've relocated my home and was suprised to learn that I can't find seeds for single flowers for love nor money. Again, thank you for responding.

Go back to the old homestead and ask the new owner if you can have some soil from the Portulaca bed.

Good idea, but I'm the old/new owner. I returned here after almost 20 years away. I did find a source online in quantity at seedsavers exchange. I've reclaimed, and am trying to recreate, part of the garden as a nostalgia area. It's been fun.

I know it's 2 years later, but often times you can find single portulaca seeds on ebay- people like you and me (not businesses) collect them from their garden and sell them and they are not expensive. I grew up with them all over the yard and searched high and low for seeds a few years back and found them on ebay. Good Luck!!!