https://www.amazon.com/Raindrip-061050-8-Inch-Watering-500-Feet/dp/B000H5WQI2

Because you are growing flowers, you should stay away from overhead watering. It will burn the petals. Instead, consider running something like this.

Drip irrigation will be better suited for your purposes.

Edit: alternatively you could run 5/8 solid poly and use spaghetti drip line if you want to focus the water right on the plant. This will cost a bit more, but save you on weeding.