Double Cosmos "Rose Bon Bon" is a new variety of cosmos at Renee's Garden introduced for the 2010 growing season. A sample seed pack of this annual was sent out in the media packet for garden writers from Renee's Garden, which is how I acquired these seeds. The pink double flower of this low maintainance garden annual looks a lot like a peony. The blooms, about three inches wide are flouncy. "Rose Bon Bon" was grown by French breeders and they do look quintessentially French, no?
I keep saying that I'm not a fan of pink flowers but they somehow keep appearing in my garden. Although, I forgive "Rose Bon Bon" for being pink, mostly because of the showy blooms and because the seeds were free. Looking at the blooms of this comos it is easy for me to anthropomorphize the flower and like it more than I really mean to.
Early in the growing season I noticed something unsual about the plants that I grew from these seeds. Some of them weren't "double" they were single or highly deformed blooms. I sent off a picture to Renee and she called me to talk about the conditions under which I was growing these cosmos.
Normally, I'd grow cosmos in poor soil and in the ground, but these I grew in a large container with good, well-draining potting soil. She assured me that she didn't notice any blooms like this when the plants were being trialed or had heard of this happening from other gardeners who had grown them.
At first I was under the impression that perhaps some other cosmos seeds were mixed in with this batch. As more of the blooms opened it became obvious that whether "Rose Bon Bon" is a hybrid or a sport, somewhere along the line it has the pink "Seashells" cosmos in its family tree. This isn't really a complaint, think of it as more of an observation on traits of flowers and plants. We may sometimes want them to be doubles, but their plant DNA says they are single blooms. Single blooms must be a dominant trait and no amount of oohing and aahing over the double blooms changed that.
When I saw the single or the deformed blooms open, I just pinched them off and tried to focus on the beauty of the double flowers. Cosmos "Rose Bon Bon" is a cut-and-come-again variety that makes them great for bouquets. Unfortunately, this meant that every time I cut off an "ugly" bloom, more of them would appear.
If you like double flowers or annual flowers that look like Peonies or are trying to achieve a cottage garden look, you'll definitely like Cosmos Double "Rose Bon Bon." Bees love cosmos blooms in the garden and "Rose Bon Bon" was visited by honeybees and sweat bees and the occasional wasp. The blooms lasted a long time in my container garden, only ceasing when I went on vacation and they weren't watered and dried up. I've seen this cultivar of cosmos also sold as "Double Click Rose Bonbon." The name might be slightly different, but it looks like the same fancy, romantic blooms. "Rose Bon Bon" was bred for the cut flower trade so don't forget to take a snip a few blooms and bring them indoors where they can be enjoyed up close. If you'd like to buy cosmos "Rose Bon Bon" Renee's Garden is where I got my seeds from.