How to grow Arugula hydroponically
Eruca sativa reaches harvest in 28–49 days in a hydroponic system, with a preferred pH of 6–7. This guide compiles the operating parameters published by university extension sources for this crop.
Target pH
Maintain reservoir pH at 6–7. pH controls how readily the roots can absorb each nutrient; outside this window the plant shows symptoms of deficiency even when the nutrients are physically present in solution.
Measure with a calibrated pH meter at the same time each day and log the reading. Drift of more than 0.3 units over 24 hours usually signals a reservoir change or a nutrient imbalance.
Nutrient schedule
Targets in ppm for the elemental nutrients most commonly tracked in home hydroponics. EC is shown per stage where the cited source publishes it; absence of a stage EC is intentional and not a data gap.
| Stage | N (ppm) | P (ppm) | K (ppm) |
|---|---|---|---|
| seedling | 210 | 31 | 235 |
| vegetative | 210 | 31 | 235 |
Compatible systems
Hydroponic methods that have been documented as workable for this crop in the cited literature.
- Deep Water Culture (DWC)
- Nutrient Film Technique (NFT)
- Ebb & Flow
- Kratky
Sources
All numeric parameters on this page are drawn from the following extension and research sources.
- e-GRO Research Alert 2017.02 — Symptoms of Common Nutrient Deficiencies in Hydroponic Arugula (Mattson & Merrill) (accessed 2026-04-20)
- UC Marin Master Gardeners — Arugula (accessed 2026-04-20)
- Cornell Garden-Based Learning — Arugula Growing Guide (accessed 2026-04-20)