This is the first time I have seen this thread. I just looked up Johannesburg, South Africa's weather for next 8 days
https://www.google.com/search?ei=qcm...iz.S8I3oDhhXpc It's actually very close to the weather forecast for Dallas, Texas, USA. However, that's about the only thing in common.
Just guessing by this
https://www.holiday-weather.com/johannesburg/averages/ I would plant potatoes in June there.
That is roughly 14,677 km or 9119.865 miles away.