The 3 parts to good ri­par­ian de­sign

NZ Lifestyle Block - - Our Water -

Cer­tain plants grow best in cer­tain re­gions. If you’re un­sure which plants are suit­able for your area, con­tact your lo­cal nurs­ery or re­gional coun­cil for ad­vice on the best op­tions. Dairy NZ also has great re­gional list­ings of plants: go to www.dairynz.co.nz/en­vi­ron­ment/wa­ter­ways/ then click on ‘Re­gional Plant­ing Guides’ at the top of the menu on the right-hand side of the page and choose the one for your re­gion.

1 Outer mar­gin Spac­ing: 1 me­tre wide

This in­cludes dense, low-grow­ing pas­ture species to trap sed­i­ment and nu­tri­ents, but also so it’s easy to pre­vent plants from short­ing elec­tric fenc­ing or stock reach­ing plant­ings in­side the mar­gin.

2 Mid-mar­gin Spac­ing: 1-2m Popular op­tions:

cab­bage trees, manuka Plant with taller trees and shrubs that shade the water­way which will re­duce weed growth and cre­ate shel­ter for new seedlings to be­come es­tab­lished. In­clude veg­e­ta­tion that cre­ates shade to help to keep wa­ter tem­per­a­ture sta­ble and en­cour­age fish and in­sects. Over­hang­ing veg­e­ta­tion also pro­vides a source of food for trout and na­tive fish as bugs fall from veg­e­ta­tion into the wa­ter.

3 Chan­nel mar­gin Spac­ing: 0.5-1m Popular op­tions:

toe­toe, flax, gos­samer grass, na­tive sedges (eg, Carex species) and rushes (eg, Jun­cus species) This re­quires species that will tol­er­ate sed­i­ment de­po­si­tion, that don’t mind wet feet if an area is prone to flood­ing, and that will be able to ‘lay down’ in fast-flow­ing flood­wa­ters. Na­tive sedges and rushes can even sur­vive if they are un­der wa­ter for a cou­ple of days.

Outer mar­gin, eg pas­ture Mid-mar­gin, eg cab­bage trees, manuka, flax Chan­nel mar­gin, eg toe­toe, flax, gos­samer grass, na­tive sedges

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