As an initial site check, before planning new planting, consider the following points.
The existing vegetation may need surveying to assess its existing ecological value, in order to avoid the danger of spoiling something of value by planting trees on it.
There may be sufficient seed sources nearby so that natural regeneration of trees would proceed fairly rapidly if grazing or mowing ceased. Check for natural regeneration at the edges of the site or in any protected pockets, or look at any similar sites nearby which are not grazed or mown. natural regeneration of pioneer species such as birch or willow is likely to occur quickly into sparse ground vegetation on stony substrates, abandoned railway tracks, bonfire sites and so on, but will be slower into a thick grass sward.
Check the site for underground and overhead services, and for the proximity of buildings. The main problem with trees close to buildings occurs on clay soils, which may shrink during a dry summer as trees remove water from the ground by transpiration. When this is not replaced by rainfall, the clay shrinks, causing subsidence and cracking of buildings and pavements. Broadleaved trees remove more water than evergreens and conifers. The table on page 67 shows the minimum distances from buildings at which trees can be planted to avoid the danger of subsidence. note that these are ‘safe’ minimum distances, as recommended by house insurers. Many existing urban trees are far nearer to buildings than this recommendation. With drought an increasing problem, it is suggested that these guidelines are followed for new planting in clay soils. For advice on whether a particular location is subject to subsidence, consult with local householders, or inquire at estate agents or local builders who will be aware of any problem areas.
When mature, will the trees block views, or shade buildings or gardens? Check carefully on an accurate plan, and on site, and consult with local residents. Photos with mature trees ‘superimposed’ will give a good idea of what the mature planting will look like. Computer software packages are available for garden and landscape design, which can produce sophisticated graphics and 3D.
Has the fear of woodland harbouring crime been effectively addressed? Frequent wardening and the use of the woodland by the community for various activities will create feelings of safety. Careful design of paths and glades, with plenty of open, light woodland helps people feel safe. It will also attract more people to use it, making it safer.
