There are loads of plants that will help Bees,
I have a fairly small back garden in which I use to grow veg around the lawn, instead of the usual raised boxed rows of veg (nothing wrong with that method at all just thought I'd try something different) I planted the garden up with plants that attract pollinators mainly focussed on Bumblebees. In-between the pollinator plants and in growing tubs I put various food crops, so far its been really successful and I usually get a pretty good yield all naturally pollinated with the added bonus I get to watch all the insects, bees and butterfly bumbling about doing their thing while I am out in the garden.
Many of the plants I've used are also edible, cheery trees are a great example of this. if you are interested some of the plants I have had success with ie really seem to attract bumblebees are:
Stawberrys - They seem to prefer the wild Alpine variety rather than the heavily bread and cultivated ones
Rosemary
Lavender (they love these plants - especially white Lavender)
Thyme
Red currant (especially good as it flowers early so provides food for the early bees and attracts them for early crops).
Raspberry
Chives
Blackberry
Mint
Cherry
Some of the other plants I have used (not sure if they are edible or not):
Vipers Bugloss (hard to find in garden centers I managed to track down a seed pack a while ago but likes sandy soil.. not so good in my heavy clay soil)
Borage
Heather
Fuchsia
Lungwort
Lupins
Wisteria
I have a lot of others food crops and flowering plants but the list above seem to really attract the insects. I know Buddleia is meant to be really good too.. I just don't have space! interestingly since planting my garden up like this I really don't seem to get any wasps in the summer now (this is purely anecdotal I know!).
Anyone thinking of doing some veg growing for the first time or laying out a new garden I would really recommend this "traditional cottage garden" method. For instance I usually get enough potatoes to see myself and SWMBO through the year and it is a small garden, plus if nothing else it appeals to my inner child... searching through the plants to see what I can find "oooh found some Garlic ... forgot I planted that..."
If you are interested this is a good link to look at gardening for Bees. I had Bumblebee boxes for years with nothing taking residence in them, since planting the garden up I had my first colony!
http://beekind.bumblebeeconservation.org/