New Zealand Spinach

New Zealand spinach is not related to real spinach, and it does not taste quite like real spinach, but it cooks like spinach and stays productive in summer heat that would send true spinach into a flowering stalk by June. The leaves are thicker and more succulent — they hold up better to hot weather and need less water than most greens. For gardeners in warm climates who want something leafy to harvest between May and September, this plant can be the answer.

The seed coat is the obstacle most people hit first. New Zealand spinach seeds have a thick, hard shell that can delay germination for weeks if you sow them dry. The fix is to soak the seeds in water for twenty-four hours before planting, or nick each seed coat lightly with a file. Either method gets water into the embryo faster, and germination tends to happen within a week instead of three. Skipping this step is the most common reason gardeners think the seeds failed.

Once established, the plants spread. New Zealand spinach is a low ground cover that can reach two to three feet across, branching out in all directions and rooting at the nodes where stems touch soil. That sprawling habit suppresses weeds effectively, but it also means you need more space than the eighteen-inch spacing might suggest — plan for each plant to claim at least a square yard by midsummer. In a small garden, one or two plants may be enough.

Harvest by pinching off the top few inches of each stem, leaving at least two sets of leaves behind. The plant will branch from where you cut, and each branch will produce more tips to harvest. Frequent cutting keeps the plant in leaf production and delays flowering, though eventually it will send up small yellow flowers regardless. The leaves stay edible after flowering starts, but they can develop a slightly bitter edge if you let the plant go too long without harvesting.

Water needs are lower than most garden vegetables — this is a plant adapted to coastal sand dunes and dry slopes. Overwatering or heavy soil that holds moisture tends to encourage root rot, especially in humid climates. If your garden soil is clay-heavy, a raised bed or a spot with good drainage will give better results.