The Trust’s view
In many of our woods (particularly our ancient woods), we prefer to let nature take its course through sensitive and gradual management over time. As such, we generally only introduce flowers into some woodland creation sites. Thinning trees, coppicing or clearing understorey allows more light to reach the ground, and can help stimulate the growth of wildflowers stored in the seed bank in more mature woods or those undergoing restoration work.
Many wildflowers won’t grow without the right sunlight and soil conditions, so it can be very beneficial to focus on developing these conditions to encourage species to colonise and spread. The Forestry Commission have an excellent leaflet (PDF) on managing woodland, which we recommend if you are new to woodland management and need some advice.