Find a new use for that fallen tree by creating a natural planter for your home. Ensure that the log you select or cut has evenly cut flat ends so that it stands upright and does not wobble. A dried out log will be easier to work with, and also, when the log has had a chance to dry out, the bark naturally falls away leaving you with a nice, smooth outer edge for your planter.
Use a drill bit and a corded drill to bore holes into the top end of the log. A corded drill is better than a cordless in this instance, because the bit will require a lot of consistent power. Use the widest paddle bit to clear the most space with each drill plunge. Using a tri-flute spade bit like shown here will also help you to bore through the wood with ease.
Bore the bit repeatedly until you have created your first hole in the log, a pilot hole. Continue drilling into the wood around the edges of that pilot hole to create a wider space for plants. Use the vacuum periodically as you bore into the wood to clear away shavings, and deepen the hole until it is deep enough to accommodate plant roots – 8” deep is a good goal. The drill will not leave you with a perfectly smooth interior as you might find with a professionally manufactured planter, but it will shape plenty of negative space in the log in which the herbs can grow.