[Izzy]

Earlier today I was discussing toms with a friend who has several successful years' experience of growing her own in a 30' polytunnel. She uses those green plastic rings into which the tomato plants are planted. The water and feed goes into the surrounding ring which presumably channels everything efficiently right to the roots. (Is this the 'ring culture' that I've heard about?) She also mentioned that With this system it was easy to dispose of the poisoned soil around the feeding roots at the end of the season. Do toms poison the soil?

[Possum]

I rotate veg in the polytunnel and have had a number of different fruit and veg after the tomatoes. No evidence of poisoning at all.

[Lesley Silvester]

I grow tomatoes in my greenhouse soil every year with no problem. I only change the soil occasionally although I will add well rotted manure now and again.

[Izzy]

Hmm. I think what my friend means is that she disposes of the really sour, spent soil in which her toms have been rooted. I don't think she really means poisoned. Thank you for those responses. I think I will just grow my toms in greenhouse soil as I originally intended. This is my first year with a greenhouse and I can't wait!

[DavidandCollette]

What Possum said. You either need to rotate your crops if you have the space or change the soil on an annual basis