I would have thought that just the opposite would be the case. In spring, brown green shoots appear with small cones at the tips that produce spores. The enriched soil would be a wonderful bed to encourage lots of new plants to germinate and any nutriment in the soil would also strengthen the existing plants. The contention seems to be the use of Kurtail (Kobosh) would be the best solution.

Certainly don't think that improving the soil is the solution to removing horsetail... As Jimmy has said it will love the new enriched ground and ramp away.

Thank you both, I don't know what I will do as, as you know Kurltail no longer available. It is also growing up in middle of plants and really everywhere in front garden and only a few places in back garden. Reason I half believed him was I am in middle of clearing and getting rid of previous owners compose piles as they are contaminated with glass, plastic, nails, and broken pots plus more yet there is no sign of Horsetail there. Weird.

We it sounds like the previous owners compost heaps are hardly full of goodness!

True, thats why I decided to clear them and start again. Found some nice dark soil at bottom of 1st one I cleared but considering what I also found that I listed, I decided not to chance it and just start a fresh. Thanks Jen

Google ProGreen, I think they sell Kurtail Gold. They don't say that it has been discontinued from stock.

Yep, Kurtail gold is still available.

Thanks all, I will have to look into buying some, last year I was given something by one of our customers, in a unmarked bottle so don't know what it was and that seemed to work but we won't see him for couple of years so can't ask him what it was or for more. Thanks again Jen