Once u plant the blackoil sunflowers they come up every year as we got them started by feeding birds. Since they went into bloom the finches have been coming in daily even though i doubt the
seeds r ready for them. they get to be huge plants. Much bigger than the grey sunflowers. Small blooms but so many of them.
I signed up and am going to start checking to see how many bees visit our plants in 5 minutes like the site mentions. I think this is a neat idea. Just wish i knew what kind of bees they r. another good plant is Bee Balm. Last year i planted two tiny plants. one pink and one burgundy. This year I have a huge bed of them that came up and the bees just love them. Is a wonderful plant for bees, hummingbirds and butterfies.