Shelter & Hedging

Shelter

Considerations

  • Porosity is important as the aim is to form a wind filter rather than a wind block. A filter will minimise wind speeds creating more effective shelter on the lee of the shelter belt. A wind block will just change the course of the wind and dump it elsewhere
  • How tall, formal or natural, mixture of plants or one plant type repeated
  • Row or is there space for a deeper planting
  • Wind direction – if wind is diverted, where will it flow to
  • Soil type – clay, sandy, etc
  • Soil moisture – consistently wet or dry, a mixture throughout the year
  • Climate – high rainfall, coastal winds, frosts

How to

  • Fence the area to be planted so stock is not able to damage the trees.
  • Clear weeds and grass from the area to be planted. For larger areas, spot spraying with herbicide is the quickest method.
  • In very exposed areas we recommend erecting a fence height line of shelter cloth to allow plants to establish more quickly.
  • Mixed species can be used usually when planting two or more rows deep in a zigzag fashion to provide an excellent filtered windbreak and a more natural look. With these mixed species borders/shelterbelts, there are many more plants that could be used other than what is listed.
  • Firewood crops could be planted in a mixed shelterbelt, or a fast-growing hardier species used on the windward side with a slower-growing but more desirable plant used on the sheltered side, with the first species being cut down (or used for firewood) once the others are established.
  • A mixed shelterbelt is also another excellent way to provide habitat for wildlife.
  • Once planted, some time spent each year on trimming and fertilising will give excellent results.

Spacing for shelter trees

  • Single rows  - plant shelter trees 1 to 1.5m apart
  • Space double rows 1.2m apart and plant the trees 2m apart in the lines
  • For multiple rows, space the rows 1.5m apart and the trees 2.5-3m apart in the lines
  • Randomise the spacing of the trees in the lines and between the rows to achieve a more natural appearance

After planting care

  • Keep plants clear of weeds for the first year or two
  • If you are intending to trim your shelter trees, this is better done each year to achieve a desirable shape
  • An annual application of general fertiliser is recommended in the first few years

Hedges

Considerations

  • Hedges can be practical or purely aesthetic and have been used for centuries in formal gardens, as hedgerows to divide paddocks, to provide shelter or as a food crop
  • Borders and low hedges tend to consist of one species, as do some shelter belts
  • Clipped formal, garden edging – tall or low, preferred final height
  • Soft, loose, defining a border or back edge of a garden or paddock
  • Purely for privacy, fast growing
  • Wind direction – if wind is diverted, where will it flow to
  • Soil type – clay, sandy, etc
  • Soil moisture – consistently wet or dry, a mixture throughout the year
  • Climate – high rainfall, coastal winds, frosts

Spacing for hedges

  • For large shrub-type plants, space 50cm – 1m apart (eg Corokia)
  • For small shrub-type plants, space 30cm - 50cm apart (eg Hebes etc)

After planting care

  • Keep plants clear of weeds
  • Trimming one to two times a year – early spring and early autumn are best
  • An annual application of general fertiliser is recommended when trimming 

Taking the above information to us or your landscaper will ensure the correct choice of plant