I planted runner beans, corn and courgette plants two weeks ago. I also have potatoes that are now small plants. Over the last 4 days, the beans have turned from healthy plants to brown dead plants. The courgettes, corn and potatoes now all have brown patches on the leaves and are heading the same way. The stems and new leaves turn black. I cannot work out what it is - especially as it is affecting so many different plants.
any ideas or practical solutions would be greatly appreciated!
- 7 May, 2010