Hello, I am looking for some help. I am just finishing a two tiered retaining wall in the back of my property and have used a soil retention stacking block called Verdura (http://www.soilretention.com/). These block stack in such a way that openings are created that allow for planting in between the blocks. I would like to plant various Oxalis species in these opening and need to find sources for these bulbs. Also, any suggestions for other plants with low growth habits would be welcome. Please contact me at my personal e-mail address should you be able to help direct me with any recommendations. I have approximately 156 feet wall (3' high) with at least 500 openings that can be used. Thanks, Tom Wells Southern California