The facts behind ReGrow’s success.

ReGrow is full of goodness. It is a rich source of readily available nitrogen. i.e., ammonium-n.. and it contains useful amounts of phosphate, potash, sulphur, magnesium and trace elements. All of this goes into a liquid, which goes into the soil, which passes on all that goodness to your crops.

Did you know? Approximately 90% of the Nitrogen in ReGrow is readily available. When you think that Pig Slurry only has around 70% RAN and cattle slurry 45% RAN, ReGrow compares very favourably.


To get the most from ReGrow, it should be applied at the right time, in the right amount to the right crops, using precision application equipment. By increasing the amount of crop available nitrogen supplied, you will realise greater benefits. And greater financial rewards.

  • Always use an up to date analysis of ReGrow.
  • Use precision application equipment. Consider band spreaders, shallow injectors or
    rapidly incorporate ReGrow into the soil where appropriate.
  • Apply ReGrow when crops are actively growing. This way they will use the applied
    nutrients effectively.


ReGrow is certified under the Biofertiliser Certification Scheme as a product. This certification gives farmers assurances that the anaerobic digestate is safe, consistent and fit for purpose. BSI PAS110 is a benchmark standard for Anaerobic Digestate ensuring it is safe and reliable to use. ReGrow is regularly tested to maintain compliance. ReGrow has passed tests for:

  • Low levels levels of potentially toxic elements (copper, zinc, lead, nickel, mercury,
    cadmium and chromium).
  • Physical contaminants (Achieving 0% found)
  • Absence of Salmonella
  • Less than 10 CFU/g of E.coli against a limit of 1000 CFU/g


Always follow the Code of Good Agricultural Practice when using ReGrow. To minimise water pollution risks, renewable fertiliser (and other organic material) applications should not be made when:

  • the soil is waterlogged
  • the soil is frozen hard
  • the field is snow covered
  • the soil is cracked down to field drains or backfill
  • the field has been pipe or mole drained or sub-soiled over drains in the last 12 months
  • heavy rain is forecast within the next 48 hours.

Also, applications should not be made:

  • within 10 metres of any ditch, pond or surface water (or within 6 meters if digestate is applied using precision application equipment e.g., a band spreader or shallow injector); or
  • within 50 metres of any spring, well, borehole or reservoir that supplies water for human consumption or for farm dairies; or
  • on very steep slopes where run-off is a high risk throughout the year.


  • Choose fields which will get the most benefit from ReGrow
  • Target crops with a high nitrogen demand
  • Use MANNER-NPK (or calculate them here) to work out the crop available nitrogen
    supply. Then use these values in a recognised fertiliser recommendation system such
    as ‘The Fertiliser Manual RB209’
  • Calculate nutrients supplied and deduct them from crop requirement
  • Balance ReGrow use with ‘bag’ fertiliser. Aim to supply no more than 50-60% of crop
    requirement with ReGrow and balance the remaining need with ‘bag’ fertiliser.
  • Time applications for when crops are actively growing and need nitrogen.
  • Make sure application equipment has been calibrated correctly and is well maintained.

If you’d like more information on the potential value of ReGrow,
please visit the ReCalculator

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The Recalculator