Jenny, love the single rose - much better by itself - IMHO. It is a much stronger composition.
Zali looks great in black and white. If you have never worked in B&W, it is a great medium to work in as there are so many possibilities for the conversion. I am not sure what you used for the conversion, but I use Nik's Silver Efex Pro 2 a lot, as do a number of others. It is a widely used plugin for Lightroom or Photoshop for black and white conversion and the entire suite is quite cheap, if you don't have it already. I would invite you to take a look at my "52" project and that of PeteD as well. We are both dedicating them to black and white imagery. If you have any questions, I am sure there are a number of folks here, myself included, who would be only to happy to answer them.
The water drop is neat. I always find them a bit tricky to photograph and you have done a great job here. I am not quite sure if the stem in the background is distracting or not, but, I might be tempted to clone it out, but that's just me.