There is no guaranteed final-frost date for every property. The NWU local frost guide explains that different parts of Potchefstroom can receive light to severe frost on the same morning. Use your property’s microclimate, the local forecast and a sheltered reserve group rather than one fixed annual date.
Look for three green lights
Before transplanting tender seedlings
- The seven- to ten-day forecast shows no frost or sharp temperature drop.
- Nights are warming gradually and the soil is not icy cold or waterlogged in the morning.
- Seedlings have spent longer outside each day for about a week.
- You have light frost cloth, a sheltered veranda or a small tunnel ready for a surprise.
Harden seedlings without shock
- Begin with two hours in bright shade, away from strong wind.
- Extend the outdoor time daily and add gentle morning sun.
- Transplant on a calm afternoon, water thoroughly and protect the first few nights.
Frequently asked questions
Is one warm week enough?
It is encouraging, but not sufficient on its own. Also consider the following nights, wind, cloud cover and the microclimate of your property.
What should I do if frost is suddenly forecast?
Move pots under cover, protect young plants before sunset with breathable material and remove the cover when the morning warms.
