Have you read through this thread?
https://permies.com/t/1805/critters/Sepp-Holzer-recipe-animals-trees
There's quite a few people posting about their experiences with it
permafarmer Hatfield wrote:The Bone Sauce has worked so far. We visited our farm in late July, many trees had been browsed, but the trees that were given a dose of bone sauce had not been touched at all.
We planted maples and elderberries, all the maples in the area showed signs of being eaten, but not the ones that had been sauced.
I highly recommend the method and will continue to use it on more extensive plantings.
Kota Dubois wrote:...
Results....Neither anymore damage nor even their deer tracks in the meadow all summer long (which is rare). Did I put up an invisible fence?
I also had a groundhog try to move into my main gardens so I painted his burrow entrance with it. It didn't work for him. The porcipine wasn't detered nor were the wild turkeys.
I don't know how long it will last but I'd be tempted to do it every spring, just to be sure.
and,
Andrew Schreiber wrote:Howdy,
I can second the experience that The Sauce burns leaves. I've only put it on during winter dormancy.
We get a lot of bud and bark eating from deer in the depth of winter.
However, throughout this spring, I have seen deer activity all around the trees I have put The Sauce on.
No herbivory to the things I put the sauce on (including herbacious strawberries, which did get a little burned by the sauce but that is better than being eaten by deer). But lots of intense grazing to the understory herbs and grass.
I am very pleased with how The Sauce is working. I have not encountered anything that works this well. Literally 100% success at this point. As I wrote above, I slathered it all over everywhere on the tree. What a partner felt was excessive application....but it is working so I feel that it needs to be laid on thick all over the plant.
FYI, also I made the bone sauce and then mixed it with equal parts sheep tallow. It extends The Sauce, and still works fine.
I also made bone sauce, and it worked really well the first year. Deer would be eating the
trees, applied the sauce and BAM no more deer munching. The next year, I saw them munching again on my trees, and applied it again (it rains a LOT here) and the deer stopped eating the trees. This year, I noticed them eating my trees again this spring. I reapplied the sauce (which had gotten kind of moldy by this point) and the deer did not care. They ate all the leaves and apples they could reach. Either I did something a bit wrong when I made it so that it spoiled, or it just doesn't last "forever." I think I'll try remaking it next year so I have a fresh batch, as my first batch did a really good job of deterring deer those first two years!
One suggestions I would have if you make the sauce is to make sure to not OVERAPPLY it, or put it on the leaves, as it does seem to "burn" wherever you apply it. I just dab a dot on each branch with a paintbrush or feather.
EDIT: by the time I'd written my post, you both had already replied. Ooops!