regarding the whole crop rotation thing (which still puzzles me - see my earlier post) What happens with greenhouses etc - do you need to remove the soil and swap it with some from somewhere else ?
It shouldn't puzzle you - read a good book. But greenhouse soil - good question - one that is seldom asked.
1. Grow different plants each year.
2. Grow plants with a built-in disease resistance.
3. Do what you do and wait for trouble to strike before changing things. A LOT of effort.
4. Sterilise the soil each year.
5. Use gro-bags or ring culture? - Tim
Thanks for thoses tips - how do you go about sterilising the soil ? Chemically ? remember I'm trying to be organic :-)
Jeyes Fluid, or Armillatox - now available again under a new name. I'm not the authority, but I regard them as 'organic'.
Everything of ours is sterilised annually with the latter. I have plenty here if you're passing!! - Tim
just to add to that - I note that HDRA make no mention of sterilising the soil - merely that there should be a 4 year rotation (and toms, aubs and peppers all count as one family) - or one can 'cover the soil with black plastic and grow in pots or bags for a year'. Tim