fertilize (part of speech: verb)
- With less vigorous plants and on dark days it is necessary to hand pollinate the flowers. - "Tomato Culture: A Practical Treatise on the Tomato", William Warner Tracy.
- Finally, the visits of insects are more likely to prove effectual, because any one that alights must touch several or many florets, and cross- pollinate them simply by crawling over a head. - "Wild Flowers Worth Knowing", Neltje Blanchan et al.