|I’d recommend buying a new toothbrush solely for this purpose. Take a look at all of the pollen covering this one, and you’ll see what I mean.|
All you have to do is wait for your plants to start producing flowers. Place the bristles of the toothbrush on the stems of the flowers (not on the flowers themselves), and turn it on. This will cause the flowers to vibrate and release pollen, similar to how a bumblebee would help to fertilize the flowers by causing them to vibrate. You only need to vibrate the flowers for a few seconds.