Final answer:
Horticulture thrives best in environments that allow for resource sustainability and regeneration of soil nutrients, which can be found in both tropical climates with extensive horticulture practices and temperate zones conducive to intensive agriculture.
Step-by-step explanation:
Horticulture is best suited to an environment where resources are sufficient to support extended-family households, with potentially a modest surplus of produce. Such an environment often involves extensive horticulture, which is ideal for lands with fewer nutrients, often found in tropical climates. Tropical soils, lacking rich humus, benefit from the practice of slash-and-burn and letting plots lie fallow to regenerate nutrients. Meanwhile, in temperate zones, intensive agriculture can take advantage of the humus created from decomposed vegetation. Horticulturists nowadays also leverage their understanding of genetics and plant physiology to improve crop yields beyond the limitations of their local environment.