Marijuana Plants and Home Studies

Hey all, I am preparing my home for a foster care home study and my situation is a bit unique. I share a home with a lovely couple. They are upstairs and I am downstairs. Our apartments are separate (so they aren't able to get into my apartment and vice versa). All of us have a love for gardening and so we share the yard and patio space and even extra veggies between us. This would actually be quite lovely for a child to be around (fresh strawberries in the morning!) However, in addition to growing veggies, my neighbors grow marijuana. I do not smoke anything so that is a non-factor, but I am trying to prepare myself for the home study and the reaction from having marijuana plants growing in the backyard. I am trying to not infringe on my neighbors and require them to throw out the plant or anything, so I was wondering if any of you had experience with this. Of note, my neighbors are following all CA and local laws regarding their marijuana plant so it is completely legal, but I can see it being an issue for a foster child. Thanks for any help! :)