NZ Sea grass planting for 1sq/m restoration

There are three current methods of sea grass restoration methods including:

Harvesting sea grass seed pods, inducing germination of the seeds and planting out in the wild to grow.

Growing the seed grass seeds in nurseries and planting back in to the wild as mature plants.

Or;

Sections of wild sea grass are harvested from plentiful areas and planted in new locations.

(This method is not prefered as it reduces existing Sea grass meadows.)