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Walter Nicol (20 April 1769 – 5 March 1811) was a Scottish garden and hothouse designer, who wrote several books on practical horticulture.

Nicol was born in Niddrie. He was employed at a number of estates in Scotland and improved the design and layout of gardens and glasshouses. Nicol is in particular responsible for the walled garden layout at Dalhousie Castle in Midlothian.^[1]

• Walter Nicol: The Scotch Forcing and Kitchen Gardener, 1797
• Walter Nicol: The Practical Planter, 1799
• Walter Nicol: The Villa Garden Directory, 1809
• Walter Nicol: The Gardener’s Kalender, 1810 (2nd edition in 1812)
• Walter Nicol and Edward Sang, The planter's kalendar, 1812, Edinburgh link1 link2
• Walter Nicol and Edward Sang, The planter's kalendar, 1820

• C. Byrom: Walter Nicol (1769-1811): A Life Revealed, RCHS Journal, 2000
• Jonathan Cass: Biographical notice of Nicol, http://www.parksandgardens.org/places-and-people/person/997