Irrigation Cycle Planner
Find how many times a day to irrigate, how much per event, and how long to run the pump for coco, rockwool, perlite, clay pebbles, and soil.
Irrigations are spaced across this window, skipping the first and last hour.
Above 1.3 adds a cycle, below 0.8 removes one.
For slabs use water-holding capacity, about 60 to 70% of nominal.
10 to 20% maintenance, 20 to 30% for flushing.
From the Cycle Frequency tab.
From the Shot Size tab.
Fill a measuring cup for 60 seconds, multiply by 60.
Irrigations per day0every 0.0 hours, first event 1 hour after lights on
- Overnight dryback target
- Suggested times (lights on = 0:00)
Shot size per plant0fl oz0 ml per event
- Daily per plant
- 0.00 gal
- Total daily volume, all plants
- 0.0 gal
- Shot as % of container
- 0%
Pump run time0:000 seconds total
- Flow per plant
- 0.0 GPH
- Timer setting
Calibrate: run one cycle and measure runoff. Adjust shot size up or down by 10%.
Starting points by medium
| Medium | Cycles/day veg | Cycles/day flower | Shot size | Runoff |
|---|---|---|---|---|
| Coco coir | 3 to 5 | 5 to 8 | 10 to 15% of container | 10 to 20% |
| Rockwool | 4 to 6 | 6 to 10 | 6 to 10% of slab | 10 to 20% |
| Perlite mix | 4 to 6 | 6 to 9 | 10 to 15% of container | 15 to 25% |
| Clay pebbles | 6 to 12 | 8 to 14 | Until saturation | 20 to 30% |
| Soil / Promix | 1 to 2 | 1 to 3 | Until 10 to 15% runoff | 10 to 15% |
Shot size = container volume × medium shot fraction × (1 + runoff). Run time = shot volume ÷ (emitter GPH × emitters). More frequent, smaller shots keep oxygen in the root zone. These are starting points; verify with a calibration bucket.