I'm going to first cover the green tape with a wrap of inexpensive single faced satin. This wrap will conceal the tape complete and look better than wrapping with only the sheer ribbon.
Start high on the bouquet, directly under the lowest calla head.
I secure the ribbon into place by pushing a pearl headed corsage pin upwards into the ribbon, concealing the sharp point by burying it deep into the calla stems.
Pull the satin ribbon firmly, wrapping down over the florist tape.
Once at the bottom fold the tape over and re-wrap the bouquet - this time working upwards instead of downwards.
Make a clean cut on the end of the ribbon, fold it over and secure into place with another corsage pin.