"用软管浇水" can be translated as "water (plants/the garden, etc.) with a hose" in English.
Here are a few example sentences to illustrate its usage:
I usually water the garden with a hose in the morning.
(我通常早上用软管给花园浇水。)
He was busy watering the plants with a hose when I arrived.
(我到达时,他正忙着用软管给植物浇水。)