Jessaboo, we have a great list of bee plants that I am going to bring on here for you. Ann (Rienbow) and I both worked on this list. There are many, many annuals there that you can just drop on the ground. In nature, when plants sow seeds they are mostly not covered, most seeds will germinate without the covering of soil, many require soil depth.
BEE PLANT LIST
Centaurea Blue Boy Bachelors Button -- Bees and hover flies love
Borage officinalis -- Bees love it, cousin to comfrey, not affected by rain because of drooping blue flowers
Agastache (Anise Hyssop) -- loved by bees
Comfrey -- Bees love it
Centaurea Dwarf polkdot mix Bachelors Button -- Bees and hoverflies love it
Consolida (larkspur) Consolida ambigua -- attracts beneficials
Eryngium planum Sea holly -- Bees are mad about this variety
Thyme T. Vulgaris -- a good honey plant for bees (thymus vulgaris)
Fireweed -- excellent honey, bees love it
Canary Creeper T. peregrinum -- bees love it, late late pollen plant
Cosmos –- valuable for late nectar source
Phacelia tanacetifolia (Purple Tansy) -- attracts bee from miles
Poppy giganthemum p. somniferum poppyseed poppy
California poppy “Apricot chiffonâ€eschscholzia californica -- bees love it
Catnip Nepeta Cataria -- a good bee plant
Lemon Balm Melissa officinanlis -- Perennial, bees love it
Hyssop Hyssopus officinalis Perennial, -- bees, hoverflies
Lovage Levisticum officinale -- bees love it
Spearmint Mentha spicata blooms late summer, --- bees, hummingbirds
Helipterum (Acroclinium) helipterum roseum Sensation Giants Mix
Yellow rocket
Impatiens capensis grows wild around my house, great for late nectar/pollen, lasts til frost-kill
Great Blue Lobelia L. siphilitica perennial, dappled light, self-sows, flowers summer through autumn
Salvia Violet Queen S nemorosa -- particularly attractive to butterflies & bees Flowers 2nd year
Crimson clover Trifolium incarnatum outstanding cut flowers, -- annual, bees love it
Buckwheat Fagopyrum esculentum -- bees love it, turn under 10 days after flowering to avoid seed drop
White Dutch Clover Trifolium repens -- all beneficial insects
In this list you find many, many plants that are easy to grow. Hope this helps you out alot.
Bachelors Buttons is a really attractive one for the bees that is not really invasive. Bees really like blue flowers, I have a mountain of types of plants that self seed everywhere on my property, and the bees are in a seventh heaven here with them. Every year I add more to different places and they self-seed and this carries on, and on, and on. I am in the process now of all the seeds that I have gathered from most of the annuals of sowing them in new places around my property. It will be a work of beauty around here this summer. I successive sow many plants, so they continue right up until frost kill. I am just now going to sow the buckwheat because I see it germinating. When buckwheat germinates, the time is right for getting my gathered seeds spread. Have the most wonderful and beautiful day, love our lives we live. Cindi