In order for the patch to be created, you will need to bring her 12 Acadia logs. Once you have brought the logs you will need to clear away a large sandstone boulder. The amount of Mining experience varies depending on your skill level. It may take several minutes to clear the boulder. Once it is gone, you will need to Construct the patch framework using the logs you brought Zahra; this will also give you level based experience.
Once you have helped her create the patch, you will be able to use the farming patch and she will guard it like many other gardeners.