I am curious. While removing and disposing of some tomato plants that had contracted the dreaded blight I wondered if I should dispose of the remaining soil in the pots or would the UV rays from the sun kill any blight bacteria?
Apparently, high UV kills COVID-19 virus on surfaces so why not blight, especially as we can have UV of 9 and even 11 here in the Algarve?
But then on further consideration, if the UV rays kill the bacteria why do they not kill the bacteria on the tomato plants?
No matter what precautions I take, every year is the same. If the plants were growing in the ground I would not be removing all the surrounding soil. Do you?
1. Do you remove the soil?
2. Allow the soil to rest before replanting with another crop?
3. Dispose of all the soil in pots or allow to break down in the compost heap?
4. Other – suggestions, please.
I don’t have green fingers or the green thumb so for me gardening is down to green science.