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- McPartland, John
- McPeek, Mark A.
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- McPherson Seed Co.
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- McPherson, Andy
- McPherson, Audrey
- Mcpherson, B F
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- Mcqueen'S Nurseries,
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- McRae, Jane M.
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- Mcrae, R H D
- McRae, R. D.
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- McVaugh, Rogers, 1909-2009
- McVay Seed & Floral Co.
- McVay Seed & Floral Company.
- McVay Seed and Floral Co.
- McVay Seed Co.
- McVay Seed Company.
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- Md.-Zain, Badrul Munir.
- M'donald, John D
- Md-Zain, Badrul Munir
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- Meachen, Geo. C.
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- Meador, Travis
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- Meadow Brook Farm.
- Meadow Brook Nurseries, Inc.
- Meadow Lawn Stud (Farm)
- Meadow Mountain Bulb Farm, Inc.
- Meadow Park Nurseries.
- Meadow, Jacob R.
- Meadows, A
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- Meadows, Peter S
- Meadows, William R. (William Ransom), 1875-
- Meadowvale Farm.
- Meadowvale Farms.
- Meadowview Rock Gardens.
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- Mealing, H. G., Mrs.,
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- Meanley, Brooke
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- Means, Thomas Herbert.
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- Mearelli, Mario
- Meares, John, 1756?-1809