The National Tropical Botanical Garden (NTBG) is a Hawaii-based not-for-profit institution dedicated to tropical plant research, conservation, and education. It operates a network of botanical gardens and preserves in Hawaii and Florida.

Allerton Garden, also known as Lāwaʻi-kai, is a botanical garden, originally created by Robert Allerton and John Gregg Allerton, located on the south shore of Kauai, Hawaii. The garden covers an 80-acre (320,000 m2) area and is situated beside the Lāwaʻi Bay, in a valley transected by the Lāwaʻi Stream. It is one of the five gardens of the non-profit National Tropical Botanical Garden.