Glossary
Agricultural Hydrogel
Polymer that stores irrigation water and releases it to the roots when the substrate dries.
Agricultural hydrogel is not the gel from lava lamps. It is mixed with soil, hydrated beforehand, and reduces the frequency of watering in exposed terraces.
How it Works
It absorbs many times its weight in water and releases it based on humidity differences. It does not replace an aerated substrate or real drainage.
Limitations
Poorly dosed, it can rot. In humid interiors, it is excessive. In seedbeds, it can be a hindrance. Always read the label for formats of 1, 5, or 10 kg.
What We Recommend at Control Garden
Water-retaining hydrogel in 1 kg for testing and 5-10 kg for raised beds. Start small.
Recommended products
View catalogue
FAQs
Is it fertilizer?
Can it be seen in the pot?
Is it suitable for grass?
Keep reading
All universesHydrogel in Pots: When It Helps and When It Rotts Roots
Hydrogel doesn't replace watering: it spaces it out. Mixed poorly, it suffocates roots.
How to Use Hydrogel in the Garden and on the Terrace
Protocol for incorporating hydrogel without suffocating roots or inflating the root ball.
Hydrogel for Drought in Pots
Space out watering for tomatoes, geraniums, and sun planters. Not for cacti or seedlings.
Seedling Tray
Container and technique for germinating with moisture control and separated roots.