Today's flower is pelargonium or geranium. Here in California, these are so easy to grow. A native of South Africa, they seem to thrive in our mild climate. They easily grow from cuttings stuck into the soil where you want them to grow. That's how these were planted 2 years ago.
In answer to Morning's question, I use Lavandula angustifolia (English lavender) for my wands, but Lavandula dentata (French lavender) also works well. I suspect you are using Lavandula stoechas or Spanish lavender. It's fat flower spikes (topped with flaglike bracts) would indeed be difficult to tame. Try using 15 stems and staggering the flower heads so it isn't so fat. And really give them a good squeeze after you tie them together. You could also use 15 stems, but cut some of the buds off to lessen the bulk. I hope one of these suggestions works. Good luck.
English lavender - French lavender - Spanish lavender