I would agree with the above post, these are great resources. I'd like to add Jacqueline Butler from Petalsweet to the list. Her flowers are amazing, and while most of her methods are proprietary for her classes (which I would love to take), she does offer a great online class through Craftsy. The course teaches her hydrangeas, filler flowers, buds, & leaves. It also has instructions for Nicholas Lodge's gumpaste. She goes step by step and explains things really well.