As a house plant, the cactus requires minimal attention. There is a minimal charge for service.
Advanced English Dictionary
+adjective very small in size or amount; as small as possible: The work was carried out at minimal cost. + There's only a minimal amount of risk involved. + The damage to the car was minimal. Compare: MAXIMAL minimally adverb: minimally invasive surgery + The episode was reported minimally in the press.
Random quote: One that desires to excel should endeavour in those things that are in themselves most excellent.: Epictetus