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Agrobiogel RETENTIS® Hydrogel Soil Water Retention

Agrobiogel RETENTIS® Hydrogel Soil Water Retention

Regular price €15,60 EUR
Regular price Sale price €15,60 EUR
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  • Now free shipping within Austria
  • Prepare your soil for autumn/winter now
  • Easy to use: only 20 g per liter of soil
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RETENTIS® transforms your planting projects into true water and nutrient reservoirs: With just a few simple steps - mixing, planting, and watering - the 100% natural wood granulate increases water storage capacity by up to 50%. The granules absorb up to 10 liters of water per kilogram and reduce watering requirements by up to 40%. During dry periods, RETENTIS® releases moisture and nutrients to the plants as needed, promoting healthy plant and root growth. At the same time, RETENTIS® decomposes in the soil into nutrient-rich humus, improving the structure and fertility of your soil in the long term.

One pack contains 750 g of Agrobiogel – enough for 40 liters of potting soil!

Easy to use

Add the granules to your planting substrate, mix thoroughly, plant your plants as usual, and finish with a thorough watering. This activates the hydrogel immediately and provides your plants with consistent moisture over a long period of time.

The correct dosage

Soil/Substrates: 10 – 20 g/liter of soil or substrate; mix evenly

New lawn/reseeding: 100 g/m²; work in dry, approx. 10 cm deep

Perennials & ground cover: 200 g/m²; mix into the top 20 cm

Planting pits (shrubs, trees, etc.) : 10 kg/m³; mix excavated material thoroughly with Retentis®

Root Protection Gel: Mix 0,5 - 0,7 kg with 10 liters of water. Wait 10-15 minutes until the granules have absorbed the liquid, stirring several times. Then immerse the roots for a few seconds.

Why RETENTIS®

Stores up to 10 liters of water per kilogram of granules and releases it back to the plants during dry periods

Saves up to 40% irrigation water – ideal for hot summers and holiday periods

Effective for 3 – 5 years in the soil, completely without microplastics

Promotes humus formation and soil structure; plants root deeper and are more resilient

pH-neutral - RETENTIS® does not change the pH of the soil and can be mixed with fertilizer

is certified for organic farming and is 100% biodegradable

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RETENTIS® im 20kg Sack aus Kraftpapier

Also available in a 20 kg bag

Need a larger quantity? Our product is also available in a 20 kg bag, exclusively through our partner. This way, you’ll always be well stocked when a little more is needed.

Order 20 kg bag now →
Illustration showing how to use RETENTIS® water storage gel: 1. Mix gel with soil or substrate, 2. Plant, 3. Water.

Easy to use

Work RETENTIS® evenly into the dry soil. As a rule of thumb, use 20 g of granules per 1 liter of potting soil.

Three steps:
1 Mix · 2 Planting · 3 Watering

Extra tip:
Work in fertilizer at the same time:
Mix your proven fertilizer directly into the soil with RETENTIS®. It binds the nutrients and releases them continuously to the plant roots over weeks – no leaching, no nutrient shock.

RETENTIS®Calc

The RETENTIS®Calc tools provide you with the perfect dosage, water-saving effect, and the right container size in seconds. Simply enter the area or number of plants for the respective application in RETENTIS®Calc, or select a round or square container for planters in RETENTIS®Calc, and get started.