Buy a 1-kilo bag of Agria seed potatoes. Agria is a great main crop potato for the home garden. Maturity in 90-100 days.
With a smooth cream flesh and yellow skin, this is a floury potato suitable for baking, wedges and mashing. A high yielding diseases resistant variety. The Agria potato was bought into NZ in the late 1980's so it is a relative newcomer but has quickly become popular with home gardeners and cooks alike.