If you want to try this for yourself, here's how: You'll need 2 Gallons of WHOLE MILK and your favorite LIVE flowers. Artificial flowers tend to sink after getting wet.
We let the hot water run until about half full, added in the milk and the heads of the flowers we chose. We LOVE sunflowers and yellow roses, and that's going to be the theme of the baby's room, so that was appropriate for us. Place the subject into the water after testing that it's not too hot. We actually had to add in cold water because it was still too hot. Then cut off the heads of your flowers and place them in the position you like, you will most likely have to keep moving flowers and leaves around due to water movement.
For the lace, believe it or not, we used a lace curtain panel! You can use almost any type of material or lace that you have. If you don't have any, head over to the local fabric store and grab about 2 yards off a bolt.
Then start shooting!! We didn't use a flash or any extra fill light, but you may need to depending on the type of lighting you have in your bathroom.