For professionals
Retail, landscaping, municipalities & agriculture
Plan dosages, calculate projects, convince customers. With trial data, training and calculation tools in the partner portal.
2 % RETENTIS®
soil only
Basil under drought stress
21 days. Not a drop of water.
Two identical basil plants, one difference: on the left 2 % RETENTIS® in the soil, on the right ordinary soil. Both were watered in once and never again.
Drag the slider and see what happens over three weeks.
AgroBiogel pot trial under identical conditions.
Explained in a few minutes
How RETENTIS® works
From dry granules to a water reservoir in the root zone: absorb, store, release.
Video: AgroBiogel
Approvals and listings
Not just claimed.
Approved under § 9 of the Austrian Fertilizer Act
National product approval as a soil conditioner in Austria, valid until 2033. Marketable EU-wide under Regulation (EU) 2019/515.
Organic-tested in Austria
Tested by Easy-Cert according to EU Organic Regulation 2018/848 and the BIO AUSTRIA standard, listed on the EasyCert input list.
FiBL input list
Listed for organic farming in Germany and Spain.
„Natur im Garten“ quality label
RETENTIS® carries the quality label of the Austrian „Natur im Garten“ initiative.
You'll find all the documents under Product details & packaging and in the downloads.
For your garden
Beds, raised beds, containers & lawn
Mix into the soil once, water in, done. Your plants keep water in the root zone for longer and cope better with hot days.
References
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Rose Garden, Mirabell Gardens, Salzburg
Renovation of the historic rose garden with RETENTIS® successfully completed The rose garden in Salzburg’s Mirabell Gardens has been completely renovated, and we at AgroBiogel were delighted to be part...
Rose Garden, Mirabell Gardens, Salzburg
Renovation of the historic rose garden with RETENTIS® successfully completed The rose garden in Salzburg’s Mirabell Gardens has been completely renovated, and we at AgroBiogel were delighted to be part...
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Project N
Project N Garden redesign with RETENTIS® for a sustainable supply of water and nutrients In Project N, a modern garden was created around a private home, with a natural swimming...
Project N
Project N Garden redesign with RETENTIS® for a sustainable supply of water and nutrients In Project N, a modern garden was created around a private home, with a natural swimming...
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City of Amstetten
RETENTIS® in municipal use: the City of Amstetten reduces the watering effort for public green spaces Well-kept green spaces, healthy urban trees and attractively designed traffic areas contribute significantly to...
City of Amstetten
RETENTIS® in municipal use: the City of Amstetten reduces the watering effort for public green spaces Well-kept green spaces, healthy urban trees and attractively designed traffic areas contribute significantly to...
What experts, users and institutions say
“A watering can in powder form.”
“RETENTIS has massively reduced the failure rate in my forest. Great product!”
“Maschinenring sees great potential in Retentis for a responsible use of water. That is why we have been running trials in arable farming and specialty crops since 2024, as part of our energy efficiency project.”
“Great product, we also use it for our sweet chestnuts at Simon Hof.”
AustroCel Hallein produces RETENTIS® and calls it a “globally groundbreaking innovation”.
“an excellent reservoir for important plant nutrients”
RETENTIS® carries the quality label of the Austrian „Natur im Garten“ initiative.
Trials & results
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HydroBeet: An Innovative Water Management System for Sugar Beet Cultivation
The EIP project HydroBeet investigates how soil water storage, sensor technology and adapted cultivation methods can make sugar beet cultivation more resilient to dry periods. AgroBiogel contributes a lignin-based water...
HydroBeet: An Innovative Water Management System for Sugar Beet Cultivation
The EIP project HydroBeet investigates how soil water storage, sensor technology and adapted cultivation methods can make sugar beet cultivation more resilient to dry periods. AgroBiogel contributes a lignin-based water...
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Use of RETENTIS® in tomato cultivation
A two-year greenhouse trial in Almería, Spain demonstrates that the biological water-retention granulate RETENTIS® enables a 20% reduction in irrigation in tomato cultivation while simultaneously increasing yield, plant vitality, and...
Use of RETENTIS® in tomato cultivation
A two-year greenhouse trial in Almería, Spain demonstrates that the biological water-retention granulate RETENTIS® enables a 20% reduction in irrigation in tomato cultivation while simultaneously increasing yield, plant vitality, and...
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Use of RETENTIS® in New Almond Plantings
Falling water reserves, irrigation restrictions and growing pressure on farms make it clear: efficient water management is vital. A two-year field trial (2023–2024) investigated how the biological water storage granulate...
Use of RETENTIS® in New Almond Plantings
Falling water reserves, irrigation restrictions and growing pressure on farms make it clear: efficient water management is vital. A two-year field trial (2023–2024) investigated how the biological water storage granulate...
