Specifications

STANDARD SPECIFICATION - BUILDINGS
DPI REFERENCE TEXT - APRIL 2009
PAGE 40
Apply to the area to be seeded a thoroughly mixed
slurry of seed, fertiliser, vegetative emulsion, mulch
and water, free of weed, seed or germination
inhibitors, using a purpose made mechanical mixer
and high pressure pumping equipment Use local
applicators experienced in this work and using
approved methods.
21.11 Mowing
Mow to maintain the grass height within the required
range of 40 to 80 mm. Carry out the last mowing not
more than seven days before the end the planting
establishment period. Remove grass clippings from
the site after each mowing.
21.12 PLANTING
Excavation
Excavate plant holes a minimum of twice the size of
the volume of the specied pot size.
Plants
General: Provide plants with the following
characteristics:
• Large healthy root systems, with no evidence of
root curl, restriction or damage;
• Vigorous, well established, free from disease and
pests, of good form consistent with the species or
variety and;
• Hardened off, not soft or forced, and suitable
for planting in the natural climatic conditions
prevailing at the site.
Trees: Provide trees which, unless required to be
multi-stemmed, have a single leading shoot.
Labelling
Label at least one plant of each species or variety in
a batch using a durable, readable tag.
Planting conditions
Carry out planting on the same day that plants are
delivered to the site.
Do not plant in unsuitable weather conditions such
as extreme heat, cold, wind or rain. In other than
sandy soils, suspend excavation when the soil is
wet, or during frost periods.
Backlling
Backll planting holes with imported blended
topsoil.
Watering
Thoroughly water plants before planting and
immediately after planting.
Fertiliser
Provide proprietary materials, delivered to site in
sealed bags marked to show manufacturer or vendor,
weight, fertiliser type, N:P:K ratio, recommended
uses and application rates.
LANDSCAPE
21.9 GRASS SEEDING
Seed
Use seed mixtures which are thoroughly pre-mixed
with a bulking material such as safower meal.
Deliver to the site in bags marked to show weight,
seed species and supplier’s name. Use fresh, clean
new seed. Do not use wet, mouldy, or otherwise
impaired seed.
Preparation
Prepare the areas to be sown. Spread the fertiliser
evenly over the cultivated bed not more than 48
hours before sowing, and rake lightly into the
surface. If a prepared area becomes compacted
from any cause before sowing can begin, rework
the ground surface before sowing.
Sowing
Sow the seed only in favourable conditions and
using a suitable mechanical spreader. Roll the seed
bed immediately after sowing.
Watering
Water the seeded area with a ne spray until the
topsoil is moistened to its full depth. Continue
watering until germination to keep the surface damp
and the topsoil moist but not waterlogged.
After germination: Water to maintain a healthy
condition, progressively hardened off to the natural
climatic conditions. Remove weeds that occur in
sown areas.
Germination
A dense continuous sward of healthy grass over the
whole of the seeded area. Reseed areas that do
not germinate within 1 month.
21.10 SPRAYGRASS (Hydroseeding)
Preparation
Cultivate insitu soil to a minimum of 100mm
and bring existing soil to a ne tilth 50mm below
nished levels. Remove all deleterious material.
Add “Tropigro-Clay-Breaker” to manufacturers
specications. Spread 50mm topsoil and incorporate
additional “Terra Firma Organic Life” at 6kg/m3.
Application
Apply seed at 10g/m2 using:
30% Cynodon dactylon
35% Paspalum notatum pensicola
35% Paspalum notatum argentina
• To nish ush, after tamping, with adjacent
nished surfaces of ground, paving edging, or
grass seeded areas.
Tamping
Lightly tamp to an even surface immediately after
laying. Do not use a roller.
Watering
Water immediately after laying until the topsoil is
moistened to its full depth.
Specifications March 2009.indd 40 11/03/2009 11:47:13 AM