I have many weak-stemmed flowers that look like black-eyed Susans. I've seen stronger stemmed flowers that look like black-eyed Susans. Help?
There are about 20 species of Rudbeckia. Usually, finding one of the hardier perennial species will give you a more prostrate plant, though.
Here is a collection of articles that will help:
https://www.gardeningknowhow.com/ornamental/flowers/black-eyed-susan
A large portion of my front yard has fully grown trees...maybe 50ft+. We live in GA and get a lot of sunlight in our front yard even at the base of the trees throughout the year. Id say at least 6 hrs a day ( they are large deciduous trees. It rarely gets below 40 degrees here. I am wondering if it is possible to grow these vines around the base of one of the trees. The soil is moist, but not soggy, the weeds have all been pulled and pine mulch has been laid down. I am not sure if it would grow up the tree or damage it in any way and everything I've seen says trellis retaining wall or hanging pot. Does anyone use large trees as a sort of natural trellis for these under the right conditions?
Because these plants keep themselves in check, they are well suited for applications such as this! They would not harm the tree.
Here is an article that will give you more information on the care of the plant:
The plants used to get black spotd and the leaves would eventually turn brown, curl up and die. This year the pant is healthy but the flowers are pretty much non-existent
If this was not, actively, treated then It can still affect the function of the plant. Treating that, and correcting the conditions that caused it (overwatering) can help to bring conditions back for flowering, but you will still want to test the soil for deficiencies.
Here are some articles that will help you to treat the disease, treat the soil, and care for the plant:
https://www.gardeningknowhow.com/ornamental/flowers/black-eyed-susan/rudbeckia-leaf-spot.htm
https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/making-sure-soil-drains-well.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/test-soil-for-pests-and-diseases.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/soil-ph-plants.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/testing-soil.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/testing-moisture-in-plants.htm
https://www.gardeningknowhow.com/ornamental/flowers/black-eyed-susan/black-eyed-susan-flower.htm
Small purplish spot on leaves with small yellow raised area.
Unfortunately, it looks bacterial! This can happen with moist soils, as this plant prefers dry locations as. It is quite drought tolerant. It will not tolerate "wet feet" very well. From here, you may try a fungicide, and remove as much infected growth as possible.
https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm
https://www.gardeningknowhow.com/ornamental/flowers/black-eyed-susan/black-eyed-susan-flower.htm
My plants get very tall and have very tiny flowers . Hundreds of them.
I would not. It wouldn't shorten them, as they are set by genetics, and would likely halt flowering for the year if done before the first flush. You can deadhead the spent blooms, however.
https://www.gardeningknowhow.com/ornamental/flowers/black-eyed-susan/black-eyed-susan-flower.htm
What causes that and how can I stop it from happening?
Flower munchers tend to be earwigs or adult beetles. Neem oil can help but needs repeated applications.
https://www.gardeningknowhow.com/plant-problems/pests/insects/removing-earwigs-garden.htm
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm
Where can I purchase pink black eyed Susan seeds from ?
We don't make vendor or product recommendations, but I did an online search and I saw black-eyed-Susan vine available in pink from several seed catalogs. I did see a Cherry Brandy Rudbeckia hirta available in seeds, but it was an American company that did not ship internationally. You will have better luck finding a European seed company in your online search.
The native black-eyed-Susan perennial, Rudbeckia hirta, is typically yellow, yellow orange or with burgundy splotches around the center.
https://www.gardeningknowhow.com/ornamental/flowers/black-eyed-susan/black-eyed-susan-flower.htm