(Question)
Is it too early to plant pansies in boxes in front of my house? The house faces west. It is sunny.
(Answer)
No, it is not too early to plant pansies outside. They are frost resistant and can cope very well with the fluctuating temperatures of early spring. They can even withstand some snow. Snow will damage any flowers that are open, but the plants themselves will be fine.
Attached is a pansy plant profile that will give you all sorts of information on growing pansies.
https://www.thespruce.com/pansies-growing-a-cool-weather-favorite-1402913