An experiment to determine the benefit of using biochar within green roof substrates commenced on the 11th of June 2015. 3 (1.5×1.5×0.6) beds were prepared with various percentages of biochar with a control bed with no added biochar. Two ‘Germinal’ wildfllower seed mixes have been used. Initially the beds will be watered. But once the seeds have become established watering will cease and the effects of the biochar will be monitored visually by analysing plant health and growth and finally by measuring biomass.