I can't speak to deer repelling ability (although a friend uses one for this purpose in a very limited area) but the motion-activated sprayer is great for keeping (our) cats out of certain garden areas like sand beds. They put them right off, without using too much water or damaging water sensitive plants. Leaving one to cover a large bed for a day puts the cats off for at least a week or more. In my experience the only long-term remedy for deer is to install a fence. I've had mine for 15 years and just last year spent some additional time/money to strengthen it in a couple places. You also need a gate to complete the circuit. J. John T Lonsdale PhD 407 Edgewood Drive, Exton, Pennsylvania 19341, USA Home: 610 594 9232 Cell: 484 678 9856 Fax: 315 571 9232 Visit "Edgewood" - The Lonsdale Garden at http://www.edgewoodgardens.net/ USDA Zone 6b -----Original Message----- From: email@example.com [mailto:firstname.lastname@example.org] On Behalf Of Pamela Harlow Sent: Thursday, October 06, 2011 12:15 PM To: 'Pacific Bulb Society' Subject: Re: [pbs] Deer Repellent One of my customers had great success repelling deer with a motion-activated water-sprayer, a commercial product made for this purpose. Potentially entertaining!