Hi. So I'm a beginning gardener. Theres a great website with lots of social activism videos,articles and presentations called Films for action.com which I found out about permaculture. I decided to join this board since part of this community is sharing information right?
So to to the point. I do have soil in my backyard although in this urban setting there is a refinery down the street. I'm nor sure what element that plays in the health of the soil but none the less my grandmother is planting her own things in the garden and weeds it herself. So I decided without putting my stuff in her space I decided to make a project out of it and by this week hopefully I will be building a portable raised garden bed. I think doing it this way may help me learn more how I could contribute what I learned back to the other areas of Los Angeles sprawl plus we have concrete in the backyard so it works out. I figured It would look something similar to this picture below but with the dimensions of about something 8x4.
My questions are now
1.What type of wood is safe to use for the garden and growing of vegetables and should it be painted?
2. As far as soil would it be best if I bought some first to experiment with growing while trying to restore the original soil in the back yard if its needed?