Tomato plants flourish in straw bales, and no weeds or weeding! Check out the straw-bale gardening movement that has become one of this summer's hottest gardening trends. (AP Photo/Cool Springs Press, Tracy Walsh/Poser Design) Wonder if this would work?
(For Grandma) How to build a straw bale garden, this site has more information. I did it this year and I'm amazed at the size of my tomatoes! I put them around my Rhubarb patches and I was harvesting rhubarb into late September! Give this a try