October 26, 2026

What is a typical garden hose flow rate?

No single typical garden hose flow rate holds at every spigot, because your water pressure, the hose's inside width, its length and the nozzle all set it. The number worth having is yours. A bucket and a timer give it to you in about a minute, and the bed's area turns that number into inches of water.

Why hose flow varies

Pressure at the spigot pushes water down the hose. Friction against the inner wall takes some of that pressure with every foot of length. A wider hose moves the same water with less of it touching the wall, so a 5/8-inch hose usually outflows a narrower one on the same tap.

• Length. Every added section adds friction, so two hoses joined together deliver less than either one alone.
• Nozzles and wands. A spray pattern narrows the opening and throttles the flow.
• Kinks and splitters. Each one squeezes the path the water travels.
• Demand in the house. A running shower or washer draws from the same supply and drops pressure at the spigot. On a well, pressure rises and falls as the pump cycles.

How to measure your hose flow

Use the hose, nozzle and spigot setting you water with. A reading taken at the bare spigot overstates what reaches the bed.

• Pick a bucket whose volume you know. Many buckets have gallon marks molded inside.
• Open the spigot to your usual setting and let the flow steady.
• Start a timer as the hose goes into the bucket and stop it when the water hits the mark.
• Divide the gallons by the seconds, then multiply by 60 for gallons per minute.

Run the test twice and keep the slower result. If you water in the morning while the house is busy, test at that hour too.

Suppose your hose fills a 5-gallon bucket in 40 seconds. Five divided by 40, times 60, gives 7.5 gallons per minute.

How many gallons a bed takes

One inch of water over a bed fills a volume equal to the bed's area in square inches, times one inch. A US gallon is defined as 231 cubic inches, so divide that volume by 231 to get gallons.

Each of our raised beds is 94 inches long and 39 inches wide, which gives 3,666 square inches. One inch of water on that area takes about 16 gallons. Our ground bed is 118 inches on each side, close to 13,900 square inches, and needs about 60 gallons for the same inch.

At the 7.5 gallons per minute from the bucket example, a raised bed gets its inch in a little over 2 minutes. The ground bed takes about 8.

Rain follows the same arithmetic. Our wettest day this year dropped 2.46 inches, which on one raised bed equals about 39 gallons from the hose. For how deep that inch wets the soil and how long to keep the hose running, see how long to water with a hose.

How to check the water reached the roots

The gallon math assumes every drop soaks in where it lands. It can't tell you how much ran off a dry crust, pooled at the low end, or drained past the roots in a loose bed.

A soil moisture reading before and after watering shows where the water went. Read at root depth, water, give it time to move down, and read again. A number that barely moved means the water ran somewhere else. Our guide to soil moisture measurement covers where to place the probe.

Raised bed 3 in our garden read anywhere from 32% to 62% moisture from mid-July into early September. Very dry soil can shed water at first, so the same hose run soaks in less evenly at the low end of that range than at the high end.

Siltwell's Today screen checks rain for the whole garden on every plan. When today and tomorrow together forecast at least 5 mm of rain, the screen shows hold. Rain of 5 mm or more in the past 3 days shows as covered. On those days the hose can stay coiled. Map a soil probe to a bed and Siltwell can also alert you once two readings in a row from that bed drop under 25%. You get the name of the dry bed and choose when the hose runs.

Time your bucket this week and write the gallons per minute on a tag at the spigot. Then divide each bed's gallons per inch by that number, and you have a run time for every bed in the garden.