Maybe what you could do is give her the drawing - which is VERY nice, btw
, maybe a single flower. It's the thought that counts, and you're showing both your talent and your attention. Does she have a specific favorite flower? Maybe getting 2 or 3 stalks and tying them together with a nice ribbon - you've just made your own bouquet, and it's usually much cheaper. Home Depot and Costo both have good quality flower bouqets that are significantly cheaper than a florist.