Stack and glue candle holders! Such a good idea. You can get the height seen in this topiary by stacking a few dollar store candle holders together. Glue them with a glass-appropriate glue (like spray paint black, and then place a flower ball on top.
I like the tall vase in the middle and the little lanterns and tealight candles surrounding it. However I'm so tired of people calling things "rustic" when they're not even close. It's not rustic! I don't want rustic!