IPA: /ˌvɛdʒɪˈteɪʃənl/
KK: /ˌvɛdʒɪˈteɪʃənl/
Relating to plant life or the growth of plants in a particular area.
The vegetational changes in the region are evident with the changing seasons.
Vegetational → It is formed from "vegetation" (from Latin "vegetatio", meaning growth or development of plants) and the suffix "-al" (meaning relating to). The word "vegetational" refers to something that is related to or characteristic of plant life or vegetation.
Think of 'vegetation' which refers to plant growth, and remember that 'vegetational' means relating to that plant life.