Collaboration with Andrea Heistinger – Sustainable Gardening with RETENTIS®

Drought stress, limited water resources, and the desire for healthy plants also pose challenges for home and hobby gardeners. At the same time, the demand for ecological solutions that can be easily integrated into everyday life is growing. This is exactly where RETENTIS® comes in: the 100% organic, wood-based water storage gel developed by AgroBiogel GmbH reliably supports plants with water supply and contributes to soil improvement.

We are pleased to announce our future collaboration with the renowned organic gardening expert Andrea Heistinger, who will bring her knowledge and experience to the application of RETENTIS® in the home and garden sector.

Andrea Heistinger – Expertise for Sustainable Gardening

Andrea Heistinger is the author of numerous specialist books, an expert in organic farming, and a sought-after consultant for garden and landscape projects. Her vision: to help people grow healthy plants ecologically and sustainably – from school gardens to raised beds at home.

Something New and Surprising

In her current newsletter, she aptly describes RETENTIS® as a “watering can in powder form” – a product that reduces garden maintenance while keeping plants vital.

RETENTIS® in Home and Garden – Benefits at a Glance

Easy water saving: RETENTIS® stores up to ten times its own weight in water and releases it to the roots as needed. This means: less watering, more security.

Healthy plant development: Especially during dry phases or high temperatures, vegetables, herbs, and ornamental plants benefit from consistent water supply.

Simple application: The granules are mixed directly into the soil or substrate – in raised beds, flower pots, or garden beds. Even small amounts noticeably reduce watering needs.

👉 Learn more about the application here

Sustainability: RETENTIS® is made from lignin, a by-product of wood processing. It is organically certified, free from synthetic polymers, and leaves no microplastic residues.

Practical Applications

• Mix directly into the planting hole when planting vegetables or herbs in raised beds.
• Blend with soil in balcony boxes or potted plants to ensure consistent moisture.
• Use during the seedling stage to reliably supply delicate roots with water.

Conclusion and Outlook

The collaboration with Andrea Heistinger connects the scientifically developed product RETENTIS® with long-standing practical knowledge in organic gardening. Together, we want to show gardening enthusiasts how easy sustainable gardening can be – with less effort and healthier plants.

“A good gardener is someone who understands roots.”
— Andrea Heistinger

PS: Follow us and Andrea Heistinger on Instagram and subscribe to Andrea Heistinger’s newsletter – so you don’t miss any of her practical gardening tips and inspiration!