Self seeding Periwinkle, Portulaca and Celosium

Many of the Periwinkle, Celosium and Zinnia seedlings that I had planted this year, died for reasons still unclear to me, as I had mentioned in my last post. Having paid so much for those seedlings when I could have them for free, motivated me to try to collect some seeds for next year.
And while I was on the collection spree I discovered some hidden treasures in the form of seedlings of Periwinkle, Portulaca and Celosium that had self seeded from last year! These I promptly transplanted into pots where they could grow unhindered.
Here are some Portulaca and Periwinkles which have self seeded in the Croton pot.

 Lots of little seedlings of Celosia Plume in an empty pot.

 Vinca and Portulaca in my Poinsettia pot.

Some Periwinkle seedlings in the Tuberose container which has been lying next to the Periwinkle plant (in the foreground) for many months now.

Some of the little treasures I discovered transplanted into new pots. Here, I have not yet taken out the wilted seedlings hoping against hope that they might still "wake up".