Loder was active as a plant collector, breeder and grower. He developed hybrid rhododendrons from crosses between R. fortunei and R. griffithianum. The plants were named the Loderi hybrids and group in his honour. Three, Loderi King George, Loderi Pink Diamond and Loder's White, have received the Award of Garden Merit from the Royal Horticultural Society. He developed the garden at his home at Leonardslee extensively.[5]
Loder kept a menagerie in the grounds of Leonardslee, the family ancestral home in Sussex. Many of the animals were made into osteology specimens, and 200 skulls and skeletons are now are in the collection of World Museum, National Museums Liverpool, being presented to the museum in 1961.[7] A number of the game heads from Loder's museum are in Rowland Ward's Records of Big Game.[8] These were accumulated through Loder's hunting expeditions, but also purchase.[8]