The Groasis Waterboxx is a device designed to help grow trees in dry areas. It was invented and developed by Dutch former flower exporter Pieter Hoff, and won the Popular Science Green Tech Best of What’s New Innovation of the year award for 2010. Pieter Hoff has written "The Blue CO2 Booklet: CO2 a Gift From Heaven," in which he proposes to plant trees to solve problems with CO2 emissions to the earth's atmosphere.
Large land areas in the world are too dry for trees to survive. Although water may be present in the ground, it is often too deep for small trees to develop a root structure to reach. The Groasis Technology is a biomimicry technology that consists of: 1) improving the soil with mycorrhizae 2) leaving the capillary structure intact 3) using plants with appropriate types of primary roots 4) the use of the waterboxx and if necessary when planting on rocks 5) the use of the capillary drill. The technology is a copy of how nature solves the problem of planting plants in deserts, eroded areas, badlands and on rocks. This way it gives the possibility to replant deserts or eroded areas, restore the vegetation cover and make them productive with fruit trees and vegetables.
The Groasis is a polypropylene bucket with a lid. It has a vertical tunnel in the middle for two plants. A wick allows water from inside the box to trickle into the ground. The device mimics the insulating effect bird feces provide to germinating seeds. The Waterboxx lid mimics a lotus leaf, and has similar properties of superhydrophobicity. This papillae covered surfaces serves to funnel even the smallest amount of water down siphons into a reservoir.  
As of 2010, the development has taken 7 years at a cost $7.1 million.
Use of the box initially involves digging a hole in the ground by a human or a machine. One to three plants are planted in the hole, and a cardboard panel is placed around the plants. A wick is inserted in the bottom of the Groasis which is then lowered over the plants and filled with water. Two lids are put on, funnels inserted and a cap plugs the top lid.
The product functions as a plant incubator, sheltering both a newly planted sapling and the ground around it from the heat of the sun, while providing water for the plant. The lid collects water from rain and nighttime condensation, which is then stored in the bucket. The water-filled Groasis releases small amounts (around 50 ml per day) of water into the ground by a wick to water the tree and to encourage the tree to develop a root structure. The box acts as a shield for the water in the upper ground, and this water then spreads down and out instead of being drawn to the surface and evaporated. Both temperature and humidity beneath and inside the box are more stable night and day than without.
The box has been tested for 3 years at Mohamed Premier University in Morocco where nearly 90% of plants survived with the box compared to 10% without. Apart from projects in warm arid areas, the box is being tested in wineries and cold mountain regions. The Waterboxx is also being used to grow water loving trees in temperate regions, including growing giant sequoia (Sequoidendron Giganteum) in the Great Lakes Region.
- Applied ecology
- Ecological engineering methods
- Environmental technology
- Green Sahara
- Air well (condenser)
- Witkin, Jim. Developing a ‘Water Battery’ for trees New York Times, 9 April 2010. Accessed: 5 December 2010.
- Jannot, Mark. Best of What's New 2010: Our 100 Innovations of the Year Popular Science, 16 November 2010. Accessed: 5 November 2010.
- AquaPro Holland Groasis Waterboxx Popular Science. Accessed: 5 December 2010.
- "CO₂, a gift from heaven : the blue CO₂ booklet". WorldCat. Retrieved May 29, 2012.
- Hoff, Pieter Hoff "CO2 a gift from heaven", The Blue CO2 Booklet
- Susan Kraemer, "Inventor Uses Biomimicry To Create Dew", Cleantechnica.com
- Parsons, Sarah. Groasis Waterboxx can grow trees in any climate – even the desert Inhabitat, 4 December 2010. Accessed: 5 December 2010.
- Buczynski, Beth. New tree-growing device inspired by bird poop Care2, 30 November 2010. Accessed: 5 December 2010.
- Coxworth, Ben. Groasis Waterboxx lets trees grow up in unfriendly places GizMag, 18 November 2010. Accessed: 5 December 2010.
- Binns, Corey. Invention Awards: A box that keeps plants hydrated in the desert Popular Science, 25 May 2010. Accessed: 6 December 2010.
- A'Hearn, Peter. Groasis Waterbox tree planting demo (Video) TeacherTube, 20 September 2010. Accessed: 5 December 2010.
- Fernandes, Sunil. Oil & Gas page 34-36 Oil & Gas Review, May 2010. Accessed: 5 December 2010.
- Growing trees in the desert, with the aid of a 'Waterboxx' Voice of America, 12 August 2010. Accessed: 5 December 2010.
- Thinking inside the Groasis Waterboxx solves deforestation, water depletion, food shortage PR Newswire, 22 June 2010. Accessed: 5 December 2010.
- Kasica, Stephen. Eagle River gets restoration tips from the Sahara Vail Daily 23 May 2012. Retrieved: 6 June 2012.
- New Tree Seedlings Planted Along North Austin Bus Routes 30 March 2012. Retrieved: 6 June 2012.
- Waterboxx experiment Sustainable Neighborhoods of North Central Austin 23 May 2012. Retrieved: 6 June 2012.
|Wikimedia Commons has media related to Groasis Waterboxx.|
- Official website
- University of Valladolid starts in Spain the 2 billion hectares reforestation project with Groasis on YouTube
- How does the Groasis waterboxx work against desertification? on YouTube
- The Arid Arborist: A blog about results with Groasis Waterboxx