I discovered a gorgeous website, innovative and informative, hosted and created by a tag company, of all things!
John Henry is a tag printing company out of Michigan.
From their website: John Henry is a leader in print, packaging, and merchandising solutions for the horticulture industry with more than 100 years of experience. Among their many products and services, John Henry makes those helpful little tags that remind you how to plant and care for your garden center purchases. John Henry has a plant reference library of over 165,000 annuals, perennials, trees, and shrubs.
There is extensive amounts of information, along with plant combinations, suggestions for foundation plantings, deer resistant plantings, and even suggestions for plantings by color.
The most attractive aspect of this website to me is the photos are real life. In real plantings. You can search plants by light requirements or moisture and such, just like Proven Winners, but the Bloom IQ site features plants in real life plantings. Like this:
This photo is in the "Sun" plantings tab. It goes on to break down the planting by variety. With close up pics of each plant featured.
Another nice component is the "Containers" link. Lots of different combinations, tropicals, perennials, foliage, and annuals. Here's the link: Bloom IQ.