Want to add a little bit of romance to your boring shower? All you need is a hanging shower caddy, a plastic loofah, orchid bark and a few other epiphytic 'air' plants to turn a well-lit bathroom into a tropical spa getaway. Here's how to make your own! I've been growing a garden in my shower for a year now and though I've already shared the project on my friend Michael Nolan's blog and HGTV Gardens, I've decided that it's time I share it with you guys too. This hanging garden is easy to…