I dont have the patience to wait for wood to age naturally outside so I searched and searched and came up with a few different recipes for aging wood but the most common one is to put steel wool into vinegar let it sit for a couple of days (The mixture may not look much different but it will work) then brush that mixture on your wood. your wood of course must be free of all paint or stains .
I did it for the crates and here is the difference it makes
I tried a batch of age stain in an old coffee container that had some grounds left in it and it made that stain go a bit browner then just the plain type. found a new one - pennies in vinegar supposed to make it blue/gray - have to try this yet. So no clue if it actually works but you know I am gonna give it a go!!!