MB3 116a: Placing Fruits in the Ground Erev Shabbos for Use on Shabbos (311:8-9)

טלטול מן הצד only permissible if it's for the benefit of a permissible item. If you place vegetables in the ground, can you remove them on Shabbos or are we concerned they may have taken root?

Food never has the status of בסיס לדבר האסור.