"cpemberton" wrote :
How can I keep deer away from my roses? As soon as they
put out new shoots, they are nipped off by the deer.

A good high fence is the best way.

A spray containing garlic, hot pepper, and raw eggs seems to
work for me. The eggs are supposedly the worst part of the
smell for the deer, and the hot pepper is sort of a last defense
to make the roses unpalatable. Need to respray every so often:
after a good rain, or maybe once a week or so otherwise.

This is based on recipes I've seen here and elsewhere online.
I've upped the strength by adding more and more and more of
the ingredients, and adding alcohol, until it's something like this:

Mix a pint of denatured alcohol with 2 to 4 ounces of the hottest
cayenne pepper powder you can find (some health food stores
stock it in bulk). Let the solids settle and use the clear reddish
liquid: that contains most of the capsaicin.

Grind up 4 or more ounces of garlic (fresh cloves, or that ready-
minced stuff in jars) in a quart or so of water in the blender. Put
result through a fine mesh to catch the solids. I use a really fine
strainer; I suppose that a coffee filter might work, but maybe not.

Combine these two, add 4 to 6 raw eggs, process in blender or
beat thoroughly until eggs are completely combined. Dilute to
2 gallons in your sprayer. Spray generously over leaves, esp.
tender new shoots.

I have not found a hot sauce that can match the concentration of
capsaicin that I get by extracting with alcohol. Isopropyl rubbing
alcohol doesn't seem to work as well as denatured hardware-store
stuff. Be sure to dilute and mix this concotion with water before
any moving parts of the sprayer get in contact with it: I'm not sure
what the denatured alcohol, not much diluted, might do to them.

You MUST filter out the solids carefully or you'll jam most
sprayers. This mix seems to work for me...you can up the eggs,
I suppose, and that might make it stick longer and better to the
rose leaves.

Many commercial products depend on whole-egg solids, by
the way.

Mark., good luck