ZBRRA

9.1        TREE WATERING

9.1.1     To ensure that newly planted trees have optimal growing conditions to become established, watering is essential.  Increased growth will result if watering is done for two growing seasons after planting.

9.1.2     The recommended industry standard is that each newly planted tree should receive 2.5 cm (1 inch) of water each week.

9.2        TREE FERTILIZING

9.2.1     The application of fertilizer will increase the growth and vigour of trees.  In general, when trees are in a healthy state, problems caused by insects and diseases will be minimised.  The application of fertilizer will help trees overcome the effects of street bark damage, root loss, transplant shock and insect and disease damage.

9.2.2     The recommended industry standard states that newly planted trees should be fertilized annually for 2 years after planting and then once every three years.

9.2.3     Existing trees should be fertilized as required, especially when a stress factor occurs, e.g. bark removal due to trauma, excavation around the root system for utilities, grade changes, etc.

9.3        SMALL STREET TREE MAINTENANCE

9.3.1     The first few years after planting are the most crucial in terms of maintenance, to ensure good growth and the development of a strong, well-balanced tree.

9.3.2     Tree stakes must be removed before the tree ties girdle the tree trunks, normally one or two years after planting.  When stakes are loose or broken, replacement is required.

9.3.3     To improve water penetration and reduce competition from weeds and grass, maintenance around the tree base is required.