Re: Leaf spot
Talk on list of organic alternatives - try these:
for soft rot: dust infected rhizomes with flowers of sulphur. I've done this
- it works.
or: use bordeaux mixture in a similar fashion.
for soft rot and leaf spot: use a copper fungicide, eg "Fungex" (copper
ammonium carbonate) as a drench.
The above are approved by the UK Soil Association (the body that monitors
organic growing to see that it really is organic)
Graham - who does use chemicals, but carefully and sparingly.