enigmatic puzzle - Who is not in the garden?

Billy the gardener uses a grey lego bolt to plant beans inside the timber ring, Sallah!

Who is not in the garden?

Hint:

A fellowship of nine

Answer

Based mostly on the answer by Otaia (I changed some of the clues and arrived at a different answer.. Then based on more hints I changed more clues and arrived at his original answer... )

Aragorn is not in the garden.
The sentence refers to The Lord of the Rings.

Billy - Pippin, played by Billy Boyd
the gardener - Samwise
Grey - Gandalf the Grey
Lego - Legolas
Bolt - Merry, portrayed by Dominic Monaghan, who also played the Bolt in X-Men Origins (Credit user3453281)
Beans - Boromir, portrayed by Sean Bean
Timber - Frodo, played by Elijah Wood*
Sallah - played by John Rhys-Davies, who also played Gimli

* Though on an interesting note I found that many believe that the 'orn' at the end of Aragorn's name means 'tree'.) Which could make Timber refer to Aragorn and make Frodo the answer. I however think that is more of a stretch than timber referring to Frodo.