Infrastructure Development Code


The timing of grass sewing shall be considered when the grass type is selected as there are two types of grasses, warm season grasses i.e. Couch and Kikuyu and cold season grasses i.e. Rye and Fescue.

Warm Season grasses grow actively over summer and are far more tolerant of coastal conditions however can not be established from seed.

Cold season grasses do not tolerate extreme dry or hot temperature and grow actively over winter/cooler months and are easily established from seed.

With the exception of the New Zealand Browntop component, all seed shall be certified and less than 12 months old at the time of sowing. A ryegrass component to be certified as having greater than 80% live endophyte content. Seed that has deteriorated because of wetting, fertiliser-burning, etc shall not be used.

Seed mixture is to be either:

NZ Browntop - (50 kg/ha)

High endophyte Turf Rye - (200 kg/ha)

or a mix containing:

No less than 80% High Endophyte Turf Rye (200 kg/ha) with the balance 20% made up of NZ Browntop and/or NZ fescues

All new grass areas shall be built on a subgrade prepared to a California Bearing Ratio (CBR) of not less than 5 and no greater than 7. 

A 100mm (minimum) deep layer of clean, friable peat loam or sandy loam topsoil free of all perennial weeds, stones and rubbish shall be placed on the subgrade. 

Consistent watering is required to ensure adequate turf establishment. 

Other grassing techniques are subject to Council approval.

Refer to CS-23 Grassing and Turfing and AM-2 Streetscape for topsoil, grass and fertiliser mixes.

Definitions in this section