Swiss Chard Plants - Perpetual Spinach One of the most useful and rewarding vegetables. Perpetual Spinach is one of the most useful vegetables, which can be picked continuously through to the autumn months. Useful on dry soil, where true spinach runs to seed. You don't have to have a large vegetable garden to grow these Swiss Chard plants. Even the smallest patio or balcony can accommodate a few containers that will give you a bumper crop of delicious fresh produce! Perpetual Spinach can be picked continuously through to autumn. It is a succulent and very hardy vegetable, suitable for autumn and winter crops. Cook leaves and stems like spinach and add them to your favourite dish. RHS Award of Garden Merit winner.