We report a two year survey of saprotrophic fungi colonising woodchip mulch at two contrasting sites in Surrey, a formal garden and a roadside planting scheme. Two alien species (Stroparia aurantiaca and Psilocybe cyanescens) occurred at both sites, along with other notable species including Psilocybe percevalii, Agrocybe putaminum and Collybia biformis. Very little fruiting occurred on areas mulched with bark chippings. In the formal garden there was virtually no repeat fruiting in successive years. At the roadside site most species fruited profusely in the first season after deposition, then decreased greatly in numbers in the second year. It is concluded that ornamental woodchips but not bark chippings, can support diverse fungal communities including unusual species although these assemblages are short-lived.