You might have to lay a pipe below the frost line and install a new faucet by the flower garden, or haul a hose, which is hard work. Installing an irrigation system could be a big labor-saver. When wind pushes flower stems off-vertical, their tips will turn upward, creating a nasty bend in them. So pick a site that has trees, shrubs, or buildings to shield your flower garden. A strip of ryegrass allowed to grow 4 feet high protects 24 to 32 feet behind it.
Some protection extends above the height of the windbreak.
Strips 5 to 10 feet wide provide enough density to really slow the wind. Most soils need their structure, fertility, and drainage improved before planting. If you're just getting started, the quickest route to improved soil is to add generous quantities of composted organic matter. In the fall, plow or dig your flower garden area, then seed it with annual ryegrass. The seeds will germinate, and plants will begin to grow, then go dormant when the weather turns cold.