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Re: "They are not hardy below 7 °C (45 °F), so may be grown under glass in frost-prone areas" Later in the page two species are stated hardy to below freezing, so could this sentence be restated thusly: "Most are not hardy below 7 °C (45 °F), so may be grown under glass in frost-prone areas"? Briancady413 (talk) 21:53, 24 June 2020 (UTC)
- Justicia brandegeana, J. spicigera, and J chrysostephana are from experience cold hardy reliably to -12 C (~10F). J. carnea is hardy a little bit below 0C. S 75.148.233.170 (talk) 22:40, 2 August 2024 (UTC)