They are frost hardy to frost tender. They will prefer moist, well-drained soil in full sun or partial-shade. They will need staking.
You can propagate from seeds, cuttings or tubers in spring. The seeds should be sown under glass in early spring in the bed in which they are to be grown.
Pests, diseases or disorders
Aphids and caterpillars of cabbage white butterfly and its relatives may cause problems.