shrubs for cut flowers

Hi buds, I'm redesigning my pal's garden for her and want to include a small shrubbery. (Will that word forever start the Monty Python theme going in my head!?).This will involve adding plants to an area currently backed by laurel and a humongous weigela. She's not a gardener and has two very small children, so low maintenance is key. The area is half shade and the soil loamy, if a bit sucked dry by the laurel. She loves white hydrangeas and I'd love to give her some shrubs she can cut for the house. So I'm planning a white lacecap and also a snowball viburnum. Any more 'must have' ideas, perhaps for later in the year? Bxx