During this time, pollen must be transferred by bees or by a person using an artist's paintbrush or Q-Tip. If not, the female blossom will close without being fertilized, the squash will not enlarge and, in a few days, it will drop from the plant to the ground. The male blossom may open a second day, but the pollen will no longer be fertile and the blossom will close, wilt and drop from the plant that day or the next. And, as you likely know, there are many more male blossoms than female blossoms on a squash plant. There may be three to four male blossoms opening for several days to a week before the first female blossoms open.
Some gardeners discourage borer problems by applying an insectide when the flowers bloom.
I have some geraniums that have bloomed all year long. The plants have gotten quite large. You can trim geraniums to shape the plants almost any time. Just trim any leggy stems back a few inches to encourage bushy, compact growth. Then pinch-prune throughout the growing season to induce bushiness.