If you’re looking for a natural, non-toxic wood stain, you might want to raid your kitchen.
– Coffee, tea and black walnut hulls can be steeped to make a concentrated solution that case be used as a stain.
– Black raspberries are an effective wood stain when crushed and then rubbed onto wood. Allow the berry pulp to dry on the wood, and then wipe it away.
– Vinegar works as a wood stain when you add a metal object in the mix and let it sit in a glass container for a week. A handful of pennies will produce a beautiful pale Caribbean blue stain. A wad of steel wool will give you a rich reddish hue.
Now, as with any stain you should check out the results on a piece of scrap from the wood you’ll be staining. Not only will this allow you to see if you like the stain, but you’ll have the opportunity to apply several coats to see how the shade changes and deepens.
Keep in mind, too, that stained wood can change with age – often with attractive results, but be prepared to potentially end up with a different look later.
You can use a clear sealant on top of your stain, to keep it from fading.