How to Grow Arugula Hydroponically (From Seed to Harvest)
Home > Hydroponic Systems > How to Grow Arugula Hydroponically (From Seed to Harvest) Last Updated: July 2026 | Reviewed for Brassicaceae glucosinolate synthesis, bolting physiology, and hydroponic EC precision Quick Answer: Arugula (rocket) is a fast-growing cold-hardy leafy green ready for first harvest in 21 to 28 days from seed. Grow arugula in DWC, NFT, or Kratky jars maintaining a reservoir pH of 5.8 to 6.3 and an EC of 1.2 to 1.6 mS/cm (600–800 PPM). Keep water temperatures strictly between 60°F and 65°F (15.5°C–18°C) to prevent premature bolting and extreme peppery bitterness. Calculate precise mineral targets using our EC to PPM Calculator. Difficulty: Beginner DIY Seed-to-Harvest Timeline: 21…
