A box and whisker plot is a graphical method of displaying variation in a set of data. In most cases a histogram provides a sufficient display; however, a box and whisker plot can provide additional detail while allowing multiple sets of data to be displayed in the same graph. Some types are called box and whisker plots with outliers.
Can you compost Leylandii branches and hedge clippings - Yes. We were quite surprised to learn some experienced composters advise not to add Leyandii cuttings as they are apparently too acidic. Composting bacteria can remain active in all but the most acidic conditions.
Start a compost heap. This will provide natural fertilizer to your plants, lessening your need for chemical varieties. You can have a compost heap outside, or maintain a compost heap in a container somewhere in your kitchen. You can either gather compost in a small pile, or keep it contained in a bin or pen.