In 1909, on six large rubber plantations, mostly on the windward side of the island of Maui, there were planted 444,450 ceara trees, 66,700 hevea trees, and 600 castilloa trees.
About the only indigenous fruit-bearing plants are the Chilean strawberry (Fragaria chilensis) and the ohelo berry (Vaccinium reticulatum), both of which grow at high elevations on Hawaii and Maui.
In the older valleys on the islands of Kauai, Oahu and Maui, as well as on the lowland plain of Molokai, the soil is deeper and usually, too, the moisture is retained by a heavy clay.
The sugar farms are mostly on the islands of Hawaii, Oahu, Maui and Kauai, at the bases of mountains; those on the leeward side have the better soil, but require much more irrigating.
Rubber trees have been planted with some success, particularly on the eastern part of the island of Maui; they were not tapped for commercial use until 1909.
