The Robinson Family had a number of encounters with members of the vegetable kingdom beyond the plants growing in their hydroponic garden. In fact, there is a distinct theme of plants seeking to take over or even annihilate the crew of the Jupiter 2 running through a number of shows over the three year run of Lost in Space. In “The Space Croppers” the crop referred to in the episode title is plants that, whatever their benefit to their sowers, consume every living thing in their path; the process itself is quite gruesome according to the description given to Dr. Smith by Sybilla.