The HH-2 Horticultural System (HH-2)

The HH-2 Horticultural System (HH-2) is slowly gaining recognition as the most highly effective solution to many modern day agricultural and waste problems. There is an urgency to address worldwide food shortages and waste issues. HH-2 has the potential to be a “game changing” technology – but financial resources are required to bring this methodology into widespread use.

Problem One

Current systems of agriculture and horticulture plough and dig over the soil, thereby losing valuable moisture and carbon, which is consequently depleting the soil at an alarming rate. The world is losing 24 billion tons of topsoil every year. The depletion of the organic life in the soil increases the requirement for ever more chemical fertilisers and pesticides and the soil becomes lifeless.

In Africa and India the loss of topsoil is caused by overworking the soil, the overuse of chemicals, and thus over irrigation is employed which depletes the subterranean water aquifers.


Problem Two

Africa and other developing regions dump human waste into the ground in such a way that causes pollution by the contamination of water courses, the breeding of rats and flies etc., together these cause the largest loss of life in the world (WHO).



One Solution to Two Problems

With over 20 years of research The Good Gardeners International have perfected their HH-2 System as the solution by turning school, hospital, town, village and rural waste into a unique soil preserver and rejuvenator in only 90 days. This low cost technology is easily operated by the school pupils and staff, townspeople, villagers and others, thus creating a valuable food growing media and a valuable income for them – one of the surest ways to bring them out of poverty.

The HH-2 Horticultural system will:

  • Turn human and other wastes into a valuable soil preserver and rejuvenator – within 90 days
  • Eliminate water pollution, rats and flies and rubbish piles
  • Produce an optimum fertiliser to grow pest and disease free crops
  • Dramatically improve the nutritional content of food produced
  • Help educate users in simple ecological waste management and good practice agriculture
  • Create micro businesses with income generating activities
  • Help reduce malnutrition


How HH-2 works

The “secret” of the HH-2 system lies in the culture of the initial specific fungi and the subsequent bacteria that by thermophilic reaction make a potent fertiliser/soil “conditioner” from the measured inputs of waste products.

With the balanced inputs the insulated HH-2  units maintain the correct moisture balance that ensures an optimum heat curve in the first 14 days of the process.  The right fungi and bacteria grow and develop and thus all harmful pathogens are destroyed within the system.

This is all achieved with the use of the HH-2 “Hot Boxes” which can be filled to four feet deep with all manner of organic wastes including:

  • Farm waste, crop waste, biomass
  • Household waste
  • Cooked and uncooked food waste
  • Food processing waste
  • Animal waste, cow dung etc.,
  • All types of sanitation waste from the HH-3 toilet system


Additional locally sourced “essential ingredients” are then added to the mix to start the unique cultures growing. This results in HH-4, the most micro-organically active substance on Earth, with supremely effective moisture and carbon sequestration properties

No harmful pathogens have ever been found in HH-4

 These specially insulated Hot Boxes are designed with aeration vents, no moving parts or electrical hook up and can be operated by unskilled workers after training. The remarkable end product, HH-4, is produced in only 90 days. On extensive analysis no harmful pathogens have ever been found.

The Complete HH- 2 System includes HH-3

Richard, who is co chair of working group 3 with SuSanA (Sanitation to Agriculture) has designed and developed the HH-3 DRY Toilet that requires no water for flushing and works in conjunction with HH-2.

The HH-3 DRY Toilet collects fecal matter through an ordinary looking toilet. Two options are available for using this toilet system:

  1. For large communal applications the toilets are fitted in safe and secure cubicles on a raised toilet enclosure. The waste passes directly into the HH-2 Hot Boxes.
  1. Alternatively biodegradable liners are fitted inside the toilet units which very cleverly filter excess liquid into a collection system for recycling back into the system. A weekly collection is organised on a localised basis with replacement bioliners installed ready for use in the new receptacles after disposal into HH-2.

There is no need to flush the HH-3 DRY Toilet with water. There is no smell or unsightliness at any stage of the operation. Thus maximum amounts of water are saved. It is mostly drinking quality water that is flushed down toilets the world over.

The HH-2 and HH-3 will replace the need for the digging of pit latrines and can convert the inner working of UDDT toilets anywhere. Contamination of ground-water from badly managed sewage systems is the greatest cause of disease on earth (WHO).

When HH-3 DRY Toilets are fitted into individual homes, one pair of HH-2 hot boxes, strategically placed, will have the capacity to continually handle and sanitise the waste from 24 houses. This operational system will be income generating and self-sustaining.

The Unique Properties of HH-4

In a time frame of 90 days the HH-2 System produces a material, HH-4, which when applied correctly to the soil rapidly reproduces all the necessary organisms that make up a healthy soil structure. The larger of these organisms is worms and without them any agricultural situation is compromised. Healthy soil automatically reduces the incidence of pests in all crop types.

This HH-4 material facilitates the macro element, namely earthworms. These lowly creatures are ignored in modern day agricultural and horticultural systems and this is unfortunate as they produce 5x more Nitrogen, 7x more Phosphorus and 11x more Potassium in their castings than is found in surrounding soil (Balfour).

This system is more reliable and sidesteps the need for vermicomposting as it produces millions of worms in your soil which is where they naturally live and generate themselves in vast quantities. Fertile land will hold up to 16 million earthworms per acre (Howard and Darwin).


So potent is this HH-4 “fertiliser/conditioner” that the need for yearly ploughing ceases. The natural soil profile is restored, compaction is avoided, rainfall is captured and carbon is continually sequestered. This together with revised surface water management soil erosion can be avoided and a reverse in climate change can be effected. (more carbon is lost to the atmosphere by ploughing the world over than through any other source, BBC world-service)

Any school or community can grow abundant fruits and vegetables and will thus increase their potential for a more Vegan lifestyle which reduces the stress on land resources. With a much increased standard of nutrition than conventionally grown food whole communities will be able to improve their cognitive development which will in turn reduce the incidence of mental and physical health problems.

This all starts with the cessation of ploughing and digging the soil and by improving the microbial fauna and flora in the soil. The health of  plants grown in this improved soil will dramatically affects both the health of animals and man that consume crops grown on it.  The children and staff in each of our school where we can install this project will have increased health benefits. The Nutritional quality of their diet will change and the children’s full capacity for development will be realised. Plus they will be learning the most important skill of how to produce their own healthy food and prevent their sanitation from polluting their water sources.

With the HH-2 and HH-3 systems they will be able to produce abundant food without the risk of polluting their irrigation and drinking water, the need and expense of ploughing will disappear. Weeds and pests will disappear also and large amounts of water and carbon will be sequestered back into the land..