Please help. Everything I plant dies. Or get trampled on. Or eaten - by slugs and/or children.
I have a south facing garden, and a bed of rosebay willow herb in the shade of the bottom fence - so it never gets sun. Rosebay willow herb and Dock seem to be the only things that flourish there. And they are not particularly pretty plants, and everyone knows they are weeds so I can't even pretend 
So please.any ideas? My toddler keeps sampling plants after I took her strawberry picking so it needs to be fairly safe until I get her out of that habit. And she's killed the rosemary I planted by trampling on it. Not that it was doing very well anyway. The mints and thyme have been eaten by slugs and goodness knows what else. The lobelia and sweet peas are just looking sad and pathetic... I'm out of ideas.
The previous owners had very straggly and dying conifers there. Which we cut down.
Help?