noun, noun or participle which takes 'suru', intransitive verb
flourishing; thriving; lush growth
Describes plants growing thickly and vigorously, often with a nuance of unchecked spread. Can be used for both desirable and undesirable growth.
夏になると雑草が繁茂する。
In summer, weeds grow thickly.
この地域は熱帯
Tropical plants flourish in this area.