Issue 01 — Spring 2026

Urban hydroponics, measured not guessed.

We test systems, lights and nutrients in a small Madrid apartment, then publish what worked, what didn't, and the numbers behind both.

Start with systems What is The Hydro Lab?

Hydroponic lettuce growing in a net pot with visible roots and water droplets

This week's experiment

Lighting & Climate39 min

How to Calculate Electricity Costs for Your Indoor Garden

Explore our comprehensive guide on How to Calculate Electricity Costs for Your Indoor Garden. Part of our technical series on lighting and climate technology, this report covers everything you need to optimize your yield and maintain a healthy grow environment.

1 jun 2026 · The Hydro Lab Admin

Latest from the lab