This instructable details how I did this.
The tools I used were a leatherman, a jigsaw and a drill, (and a ruler and marker), and a hot glue gun.
You will need....
-Black wrap (black foil)
-Black Tack (black foil tape)
-25mm PVC pipe - about a meter
-silk flowers - 6 of
-plastic vase/urn thingy.
-1mm garden wire
-6 sprinkler head tubes (or other thin rigid but bendy tube)
-spray paint in brown, black and dark green.
Measure the squished flowers, add 10mm and this is the length of your pipe sections...
Cut the pipe into 6 lengths of this (this will make 6 flower heads)
Cut the ends of the sprinkler extender pipes if they have any, ensure there is nothing blocking them.
Once scrunched around the pipe and it's all nice and straight, black tack/tape the foil to the tube in an overlapping spiral. Once it's all secure, tape up the crease down the side.