Original: In Northern Europe, Canada, the northern states of the U.S., and the South Island of New Zealand it will grow best if sown under glass in a peat pot, then planted out in late spring/early summer (when there is little chance of a frost).
Simplified: In Northern Europe, the northern states of the U.S., and the South Island of New Zealand it will grow best if sown under glass in a peat pot. It can be planted out in late spring/early summer, when there is little risk of frost.