What factor is most important when matching a plant to a site?

Matching a plant to a site is a critical aspect of successful gardening and landscaping, and plant hardiness is the most important factor in this selection process. Plant hardiness refers to a plant's ability to survive and thrive in a specific climate, including temperature extremes, seasonal changes, and other environmental conditions.

When considering plant hardiness, it is essential to choose species that can withstand the particular climate and soil conditions of the site where they will be planted. This consideration impacts the overall health and longevity of the plants, ensuring they can adapt to local conditions without requiring excessive intervention or maintenance. A plant that is not hardy for a given area may struggle, leading to poor growth, increased susceptibility to pests and diseases, and even death.

While other factors like plant color, accessibility of water, and cost are important for aesthetic preferences, practicality, and budget considerations, they become secondary if the plant is not suited to the environmental conditions. If a plant is not hardy for the area, no amount of color, irrigation, or low cost will compensate for its failure to thrive. Therefore, understanding and selecting based on plant hardiness is foundational to successful planting.