This list describes the various campus gardens and collections at Palomar College, featuring plant biodiversity and ecological representation from around the world.

• California Natives – Displays diverse combinations of native California plants.
• Melaleuca – Drought‑tolerant plants related to Eucalyptus.
• Monocot Garden – Planted in 2006 to show diverse forms of grass‑related plants.
• Cycad Garden – Features cycads from around the world; part of the Primitive collection.
• Medicinal Garden – Near the Natural Sciences building; displays valuable edible and medicinal plants.
• Galaxy Garden – Simple succulent display planted in spiral “constellations.”
• Meso‑American Garden – Near the pool; shows rainforest species and origins of important crops.
• Southern Africa Garden – Drought‑tolerant succulents and other regional plants.
• Protea Garden – Drought‑tolerant protea species from Southern Africa and Australia.
• North Africa & Arabian Peninsula – Palms and other plants arranged to resemble an oasis.
• Hawaiian Garden – Test garden for larger Polynesian collection; rare and endangered natives.
• Rose Gardens 1 & 2 – Show roses in various forms alongside related trees.
• Undersea Succulent Garden – Succulent garden arranged to resemble a coral reef.
• Tropical & Subtropical Mountain Plants – Drought‑tolerant palms, bushes, and shrubs from South America.
• Mexico Desert – Desert garden including some California natives.
• Mauritius Garden – Plants from the Indian Ocean islands, many of which are endangered.
• Australian Garden – Showcases plants native to Australia.
• Fibrous Roots Plants – Monocots chosen to avoid root interference with underground utilities.
• Hardwoods Garden – Displays trees and bamboo used in woodworking, mixed with California natives.
• Polynesian Garden – Features plants carried by Polynesians on voyages; an ethnobotanical educational tool.
• Myrtaceae Garden – Drought‑tolerant plants from Australasia and the Pacific.
• Riparian Area – Part of the Arboretum, representing warm temperate and Mediterranean stream plants.
• Palms, Legumes & Bamboo – Rare palms and bamboo.
• Malvaceae Garden – Diversity of tree and shrub species in the hibiscus family.
• Primitive Garden (A, B, C) – “Jurassic Park”‑style living fossils planted along the Arboretum.
• South American Garden – Rare and beautiful plants from across South America.
• Butterfly & Hummingbird Garden – Plants that attract hummingbirds and butterflies from around the world.
• Indo China & Southeast Asia – Informal grouping of common plants from this region.
• Madagascar Garden – Plants from the ecologically unique island of Madagascar.
• Legumes & Palms (No Bamboo) – Similar to the palms, legumes, and bamboo garden but without bamboo.
• Rhus Garden – Displays diversity within the genus Anacardiaceae.
• Cactus & Succulent Areas – Broad succulent displays across campus; largest near Comet Circle entrance.
• Caribbean Plants – Native to U.S. Caribbean‑border states down to northern South America.
• Canary Islands Garden – Plants from the Canary Islands, off Africa’s northeast coast.