2 links
Royal New Zealand Institute of Horticulture
rnzih.org.nz
The mission of the RNZIH is to encourage, promote, and improve horticulture in New Zealand.
The Royal Horticultural Society
rhs.org.uk
Britain's Gardening Charity, founded in 1804 to encourage the science, art, and practice of horticulture in all its branches.
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