"Deer-proof" is too strong a phrase, unless it involves 10-12'(+?) fences.
I'll believe "deer-resistant", but I've seen too many hooved Hoovers that were too hungry to know they weren't supposed to like that bit of green they just munched. On the other hand, I've also watched herds of deer completely ignore hundreds of deer-magnet hostas on a customer site.
If they're hungry enough - and they've eaten everything else - they'll eat it.
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Cheers,
Everett
Green Man Enviroscaping LLC
www.greenmanenvy.com
Landscaping design, installation, and maintenance
~ emphasizing native plantings, natural solutions, and organic materials
~ specializing in woodlands & meadows
~ implementing edible forests & permaculture