I smell a bad idea for multiple reasons.

#1, 100% H2O2 Will pretty much react badly with any impurity. (they use it for rockets for a reason)
#2, if you have ever frozen low percentage alcohol (beer), you know you don't end up with a nice layer of alcohol and a nice layer of water. You get a slush. Not sure how that helps you get 100% h2o2.
#3, it would be much cheaper in the end to start off at 35% Peroxide, but it would also be much more dangerous.

-edit-

#4, low cost 3% peroxide is often impure and has chemical additives to stabilize it (another reason to use food grade 35%)

ouchhhhhhhh .........cut

My O2 booster would be Hydrazine, but then again I dont fuck with toy bottle rockets.


CHEMICAL™

Not really something that should be treated as a "toy". I would hate to see your skin after exposure to 100% H2O2... I find 35% to be bad enough.

Hydrazine is also rarely, if ever, used in "toy bottle rockets".

They use it in commercial satellites for a reason. Unlike black powder bottle rockets.

Beer turns to slush because it's in solution, the water freezes in pockets around the h202 in hydrogen peroxide, I don't think it would work.

What he said

H2O2 decomposes into Water & Oxygen giving your roots extra air to breathe.

New news to me. Makes sense though.

How much would you use and how often?

Im well aware of the purpose of hydrazine,And what kind of fool would allow any chemical contact with skin?


Chemical™

Not too sure, but it was more a comment as you seemed to be implying that hydrazine rockets are at the same level as "toy bottle rockets". Which they are not. Either that or I have no idea what the comment was in reference to.

And you would be surprised how many "fools" accidently get chemicals on their skin.

(from Mixing charts for gardening with hydrogen peroxide)
-edit-
I tried to post the charts, but It didn't work. checkout the URL above to see them.