I never quite know what to expect from the yellow ones from season to season, but this year they seem to have opted for a form somewhere in between a 'normal' yellow plumosa and that odd sport from last year that I named "Pineapple." And then there's that real oddball (I posted it a while back) that seems to have *gasp* reverted back to its original 'Castle Yellow' form after having morphed into several incarnations over the past 5-6 years (I really can't remember when I last planted the yellow ones!) and looks strangely normal amongst the other freaks. But have I mentioned how much fun it is to see these return every year, wondering what costume they'll have on each time?
Now, I know that some Celosia purists would probably turn up their noses at having them sport so freely in the garden, so to those folks, I say, fine ... pull your dead plants after frost and only buy new stock each spring so the freaks don't start populating your sunny bed. As for us, (as you surely now know), we love the adventure of seeing Nature frolic profligately (thank you, dear friends the bees!) in the garden and look forward to what new surprises we'll have in successive years.
Remember, remember, the waning days of September ... and if you still want brilliant color that will literally last until frost, include some Celosia in your garden next year! There are a lot of really nice varieties and mixes available (Park Seed has some spectacular ones) and they're really pretty easy to grow. They start easily indoors in starter pots in late Winter, but don't set them out until you are sure there will be no further frosts or you'll lose them. They can also be fall sown as well (as they do naturally), but a mild warning: you won't usually see them coming up until the ground is really warm (say late June or July here), and though they grow rapidly, your best bet is probably to either buy nursery grown plants or start them from seeds inside. Just give them lots of sun and they'll be quite happy. They're fairly impervious to dry conditions (or soils) once they've been established, so you can pretty much just get them going and come back to admire them when they catch your eye ... they don't mind a little neglect and still will reward you with their bright spires of fiery colors!
--end of sales pitch, I'm ready for my commission now--