Testing native plants with grey water

1. Dysoxylum spectabile (Kohekohe)
maoridictionary.co.nz
Four native NZ tree and shrub species were supplied by PTC for us to gauge their tolerance to grey water and suitability for use in a wetland area.
1. Dysoxylum spectabile (Kohekohe)
2. Hebe elliptica var crassifolia (Kokomuka)
3. Peseudopanax arboreus (Five finger)
4. Melicope ternata (Wharangi)








2. Hebe elliptica var crassifolia (Kokomuka)
nzpcn.org.nz

The native plants were over-wintered in the school horticulture area until spring and then nine individual plants of each species were split into three equal groups and treated with 2 litres of collected tap water, grey shower water and eco-friendly grey shower water on a weekly basis.  This enables the scientist to check out how individual species cope with the different types of grey water against a tap water control experiment.






3. Peseudopanax arboreus (Five finger)
nzplants.auckland.ac
The height and maximum width of each individual plant
 was taken each week so plant growth could be estimated.
It was decided that the measurements would be used to
determine the volume of foliage as approximated by a
cone shape.









4. Melicope ternata (wharangi)
plant-phytography.blogspot.com

The plants were kept in an open glass house so that they
did not receive any additional water from the rain.












Measuring the height and width of a plant
The plants were weeded and regularly watered





































































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