A few different people have told me this tip, so I had to make sure to share it! Apparently, if you've got some leftover regular black tea in the teapot - you might want to give your garden a bit of a boost by watering the tea right over the plants! One lady told me that her mother always used to do this, and they could trace the pattern of where her mom through out the leftover tea, because those plants always thrived the most.
So, enjoy that cup of tea, and then share a little with your plants!