Week 8 · Staple crop

Potatoes as soil and supper

Edible Landscapes

Labour weekend has become shorthand for potato planting in much of New Zealand — late October when frost risk drops in many districts and soil warms enough for tuber growth. The tradition matches sound horticulture: potatoes tolerate cool starts, break compaction, and feed households while slower crops establish.

Chitting — placing seed potatoes in light to sprout short sturdy shoots — adds one to two weeks to the season without heated indoor space. Plant sprouted eyes upward; bury 10–15cm in trenches you can hill as stems grow. Hilling excludes light from green toxic tubers and increases yield along buried stems.

Potatoes originated in Andean polycultures; they succeed on silt, loam, and clay if drainage is honest. In Southland, wait for warmer soil; in Auckland, watch for early psyllid pressure — local conditions override calendar folklore.

Short sturdy sprouts beat long pale ones — bright indirect light, cool room.

Use certified seed to reduce virus load. Supermarket sprouted potatoes are a gamble. Cut large seed pieces with two eyes each; cure cuts 24 hours before planting.

Planting pass

  1. Select certified seed

    Choose early and main-crop varieties if space allows — stagger harvest and storage.

  2. Dig trench or holes

    30cm in-row on small plots; 60–75cm between rows for hoe access. Widen for main crop.

  3. Plant and cover

    Sprouts up. Loose soil on heavy clay — do not smear wet sides of the hole.

  4. Hill as stems grow

    When stems reach 15cm, rake soil up leaving top leaves exposed. Repeat until mounds hold.

Early vs main crop

Early varieties (Jersey Benne, Cliff’s Kidney) harvest before Christmas in many regions; main crop stores through winter. Plant both if space allows.

Rotation and pests

Rotate away from tomatoes and other solanums for three to four years. Wireworm follows old grass — break sod years before planting into pasture.

Ridges improve drainage on clay and give tubers room to form along buried stems.

Family note: Kids can count eyes, measure row spacing, and hunt for the first emergence — potatoes teach patience better than most classroom charts. If soil is still cold and waterlogged at Labour weekend, wait. A late potato out-yields a rotted early one.