Position the empty pot in a sunny, sheltered spot. Ensure that the container has drainage holes, cover the base with a layer of crocks, and add multipurpose potting mix to within about 1 inch of the container’s lip.
Water the young chard plants and carefully remove them from their pots, holding them by the roots rather than leaves. Gently tease out the roots to help them establish quickly and space them about 4 inches apart.
Place the plants into holes made in the potting mix at the correct spacing, checking that the top of the root ball is just below soil level. Gently firm soil around each plant and water the container thoroughly.
Water the chard regularly to keep the large leaves firm and in good condition, especially during hot summer weather. You can also apply a nitrogen-rich fertilizer to help maintain vigorous healthy growth.