Posted: 05/08/2012 at 14:27
I lost all my outdoor plants to blight last year, and someone told me I can;t grow toms in that patch for 7 years. Someone else said 5 years and another 3 years! Anyone know which advice I should follow? The link to the rhs site didn;t say either.
If it was a bona fide Blight - Early Blight, say - you can grow toms in the same spot again the next season. There will likely be fungal spores on the soil surface. Turn the soil over and bury them. I've done it many times. Fungal spores can't do any damage underground. When a new lot arrive next season - and they will, because they're everywhere, you can't avoid them - they will be airborne. They travel on any breeze.
If, on the other hand, you had one of the several tomato virus diseases, you wouldn't want to plant in the same spot again. The viral pathogens can live on in soil.
So if you're sure it was fungal, turn the soil over very well and happily plant away next season.