Split irrigation run time into measured cycles and soak periods so slow-intake soils and slopes can absorb the target depth with less runoff.
Quick answer
Cycle and soak divides a zone's total irrigation run time into shorter watering cycles separated by non-watering soak periods. It helps when water begins to puddle or run off before the target depth can infiltrate, especially on clay, compacted soil, slopes, or high-precipitation spray zones.
The method does not add water. Three 10-minute cycles still equal 30 minutes of valve run time. The pauses give surface water time to move into the soil before the next cycle.
Know when it is needed
Run the zone while watching representative slopes, edges, compacted paths, and low spots. Record when sheen, puddling, or movement toward pavement begins. A safe cycle must end before consistent runoff starts.
Catch cans reveal precipitation rate and distribution, but runoff observation reveals intake limits. Repeat the check after aeration, soil work, nozzle changes, or seasonal drying because infiltration behavior can change.
Choose cycle and soak lengths
Start with the total run time required to deliver the measured target depth. Divide it into cycles shorter than the observed runoff-start time. Choose a soak interval long enough for standing surface water to disappear and infiltration to resume.
There is no universal 10-minute cycle or 20-minute soak. A rotor zone, spray zone, sandy flat area, and clay slope can require different settings even on the same property.
Example without making it a rule
Suppose catch cans show that a zone needs 36 total minutes to deliver the chosen depth, but runoff begins after 9 minutes. Four 9-minute cycles separated by observed soak periods preserve the same 36-minute total while reducing continuous surface loading.
Recheck the final catch depth and probe the soil. If runoff still occurs, shorten cycles or correct the physical limitation. If water never reaches the useful root zone, longer soak time alone may not solve compaction or hydrophobic soil.
Program the controller carefully
Some controllers have a cycle-and-soak feature; others require multiple start times. Confirm whether the controller repeats the full program, each zone, or only the selected station. A misunderstanding can multiply the intended water volume.
Use an early-morning window long enough for cycles and pauses. Verify the actual valve activity on the first run, confirm rain-shutoff behavior, and check that overlapping programs do not operate simultaneously or reduce pressure.
What cycle and soak cannot fix
Scheduling cannot repair broken heads, mixed precipitation rates, low pressure, poor head spacing, severe compaction, failed drainage, or water aimed at pavement. Correct system and site defects first where practical.
Cycle and soak also cannot justify watering a lawn that is already wet. The irrigation decision still begins with rainfall, turf stress, root-zone moisture, and local restrictions.
Cycle-and-soak setup
- Measure the target zone's output and distribution.
- Observe and record the time when runoff begins.
- Calculate total run time for the needed depth.
- Divide total time into cycles shorter than runoff onset.
- Test a soak interval and confirm surface water infiltrates.
- Program and observe one complete early-morning run.
- Verify delivered depth, root-zone wetting, and runoff before saving the schedule.
