Columbia subject headings:
Harvard subject headings:
Agriculture--Periodicals
Botanical gardens--Periodicals.
Botany--Periodicals
Gardening--Periodicals
Gardens--Periodicals.
Periodicals
Plants, Cultivated--Periodicals
Princeton subject headings:
Agriculture--Periodicals.
Botanical gardens--Periodicals.
Botany--Periodicals.
Gardening--Periodicals.
Gardens--Periodicals.
Periodicals.
Plants, Cultivated--Periodicals.