Something occured to me recently about flowers, nectar and pollination. Once an insect takes the nectar from a flower, taking pollen with it; does the plant make more nectar and pollen for that particular flower? How often does that individual flower give more nectar and pollen for insects to take? Or does it happen just once?
It seems once the flower’s nectar has been taken, that is the end of that flower, there is no more. It dies. I had never thought of this before. I often see insect after insect visit the same flowers, but has there been anything for them to take? It seems, no. Once it is consumed, that is it.
However, we can help increase the flowering and therefore more nectar and pollen by deadheading dying flowers. This is a simple process of removing the dead flower heads, so that the plant will generate more flowers.
I have added a link here to the Royal Horticultural Society, which gives advice on such things.
You may like to visit your own countries version of the RHS, as plants will differ in times and systems of deadheading. But please look into this and do it as and when you have time. It is worthwhile.