Yes, you can grow for her legally if she obtains a mmj card and makes you a caregiver. If you grow for her you then sell the product back to her. However with one patient you can only have 12 plants, and a maximum of 2.5 ounces of useable weed per patient. Now what you do with the rest of the product is up to you. So legally you can make a little money, but it will probably just cover your costs of growing(nutrients, electricity, etc..). Illegally there is money to be made but you have to be careful