This could have been the only kind of Christmas tree those Lost in Space folks had! Just a bushy thing that they found nearby! Crash landing on a desert planet didn't help. Much of Preplanus was truly arid. I am sure that the Jupiter 2 could not have fit a fake Christmas tree in its cargo hold!!!! There would have been no space. What was portrayed in the episodes Two Weeks in Space, or Blast off into Space was bad science.