There are two Pencil Catcus growing on the edge of the canyon behind my home. They are approximately 8-10' tall and 5-6' wide. There is a perfect sized empty plot in front of the cactus that I wish to use as a vegetable garden. To the right of the plot is a very large, very old Valencia Orange tree.(Fabulous producer) Is there a problem planting veggies due to cactus? I have grown a vegetable garden in this plot, several times, but before the cactus were rescued, as babies, and planted there. Thank You, I appreciate your help.