Posted: 09/03/2015 at 18:04
I've never found garlic wash very successful against slugs, nor anything else very helpful to be honest. I grow alot of hostas in pots so you can imagine the slugs think this is the summer barbeque for them. The only thing I have found good is copper tape around the top of the pots - they don't cross that. The odd one climbs the wall and falls into the pot, but the tape has allowed me to continue with hostas when I had begun to think I could not have them any more.
Nematodes are great at the time, it is very hard work with all the dilutions, carrying of buckets etc., and they only work once. As nature abhors a vacuum, when your slugs have gone, all the neighbourhood ones move in soon after. I have used them for a particular patch that I might want clear for a few weeks for a special occasion, but quite honestly have given up on them.