How much Comfrey can you grow on 13m2 ? - Comfrey Trial Results Year 1

Inspired by the work of Lawrence D Hills (1911–1991) who undertook extensive research on comfrey during his lifetime, we decided to start some comfrey trials of our own to see just how much biomass these plants can produce for us, how well they fertilise our crops, how attractive they are for garden wildlife and whether they have a beneficial impact on the soil. We sought to do this by planting out a test bed and measuring the weight of each cut we took. The biomass was then processed to make a liquid concentrate that was applied to our market garden crops. During the season we casually observed invertebrate activity in the patch and also during cutting times and finally each year after the cuts are complete we send a soil sample from the patch off to the lab for analysis of pH N,P and K to compare with a base sample taken before we established the patch. We also record all inputs of mulch, ash, compost and water applied to the bed. If you would like to learn more about comfrey an...