Meyer Lemon Trees produce both male and female flowers, so hand-pollination is not generally necessary. However, if you choose to hand-pollinate a Q-tip or small paintbrush can be used to gently remove pollen from open male flowers. Lightly brush the collected pollen into open female flowers, which can be recognized by their bulbous stamens in the center. Do not pinch open or otherwise disturb the flowers. They are not mature and ready for fertilization until they open naturally.