Columbia subject headings:
Harvard subject headings:
Gardening--Indexes--Periodicals.
Horticulture--Indexes--Periodicals.
Landscape architecture--Indexes--Periodicals.
Plants--Indexes--Periodicals.
Princeton subject headings:
Gardening--Periodicals--Indexes--Periodicals.
Horticulture--Periodicals--Indexes--Periodicals.
Indexes.
Landscape architecture--Periodicals--Indexes--Periodicals.
Organic gardening--Periodicals--Indexes--Periodicals.
Periodicals.