Two sprinklers in action. Morning and evening are usually good for watering: less wind, less evaporation… Still, sprinklers (a necessary evil at this point) are hardly efficient.
No April showers to speak of this year means it’s irrigation time already. Sprinklers aren’t anywhere near efficient, but they cover a lot of area quickly. This makes them a labor-saving choice for germination and tiny seedlings, where frequent but light watering is required in dry weather.