Which of the following plants requires the most maintenance regardless of conditions?

The choice of rose as the plant that requires the most maintenance stems from several key factors inherent to its cultivation and care. Roses are renowned for their complex needs, which include specific soil requirements, consistent watering routines, and regular fertilization to promote growth and flowering. Additionally, they are susceptible to various pests and diseases, such as aphids, black spot fungus, and powdery mildew, necessitating vigilant monitoring and potential use of pesticides or fungicides.

Furthermore, pruning is essential to maintain their shape, encourage new growth, and remove dead or diseased wood, adding to the maintenance effort. This level of care demands both time and knowledge on the part of the gardener, differentiating roses from the other options listed. In contrast, hibiscus, marigolds, and begonias typically require less intensive ongoing care, making rose the most maintenance-intensive choice.