Thanks everyone for your help!!!
Today the sun is shining so when it will hit the garden I will go to take off some of the older yellowed leaves and il will LEAVE the others Ken, you made me laugh!
I will keep on searching for slugs or other nice things living out there. I used salt but tomorrow we're expecting rains so salt will be gone.
@florange there's no way I will take one of those creeping things and squish them with my hands. I read that iron in grains is lethal for them and good for plants so I may go that way to avoid chemicals. In this garden I suppose chemicals won't do much damage because I have flowerbeds they are like large tubs or tanks filled with soil and remainings of the buildings (i often find piece of stone here and there), I don't think there's a connection with the underground. Anyway, maybe iron it's an idea.
Very kind of you helping Pietro. I would love to come to live there, it's a dream I have for many reasons, I may give you a call so you can help me too!
all!
