The first thing that comes to my mind is water. Daylilies are tough and drought tolerant after they are established. But they need water to bloom and grow. I water my beds by hand. So I mostly choose early-midseason bloomers because I know by Jul-Aug I'm going to be tired of it and may not give late bloomers enough water.
I also get tired of removing the dead flowers every morning; another reason for early bloomers. But if you want a long bloom season, you can find daylilies that bloom early, midseason and late. Stella d Oro, short, yellow, blooms almost all summer.
I mostly stay with moderate heights (25-30 inches) because we have a lot of wind. Though the wind doesn't seem to bother my Wild Horses at 37 inches.
Like you I prefer the bright colors red, orange, yellows. I buy from local nurseries, Wal-Mart, Lowe's.....Most of my mail orders are from Oakes in Tennessee.
https://www.oakesdaylilies.com...
Their prices are not always the best, but I have never been disappointed with a plant from them. Their shipping rates are reasonable and they send a minimum of three fans. They have a good assortment of "under $10" plants. But if you can find a local supplier that would likely be best.
One of my favorites is Mauna Loa, a burnt orange; Fooled Me, yellow with a red center; Indian Paintbrush, another orange; Good Impression, yellow; Don Stevens, yellow with a rust throat. I have found some red's are not bright red. There are several threads on this board of good red's. I like Christmas Ruby, bright red. I have been disappointed in Little Business and Pardon Me.
Do you have critters? I would be concerned that alfalfa pellets might attract rabbits, deer or other hungry critters to your flowerbeds.