Blossoms/immature fruit on peppers (and toms and eggplants etc) will also drop if the temperature is too low. I think it's average temps that matter, so you have to consider both daytime and nighttime temperatures as well. Peppers love heat, and the temperatures you describe are not all that high. I think if you are patient you will find fruit starting to set and mature as the season goes on. I would consider this early in Spring quite early to be getting pepper crops, but I'm not sure where you're located

Pale yellow- Hibisicus Dark/orangeish yellow- Marigolds! How about adding one for deep yellow? This would be the black-eyed susan...the one that grows upright, not the vining one. It's actually the Maryland State Flower. I've seen the most beautiful beds of them along the roadside traveling to the Eastern Shore. Breathtaking!!!!!

Something in the Solanaceae family, I would think. Compare to Physalis virginiana. Here is a link that might be useful: Physalis

THERE IS NO DOUBT IN MY MIND VIKANE KILLED THOUSANDS OF MY PLANTS AT MY HOME NURSERY SPECIALIZING IN MILKWEED. Other pesticide applications are also killing them. I have all the documentation. VIKANE DAMAGE PICTURES ARE BEING BLOCKED ON THE INTERNET! I want to fight this, and looking for more people with pictures of damage this pesticide that was designed as a CHEMICAL WEAPON. My hair fell out, myself and my husband almost died and have had to fight for my life for 2 years after allowed to tent 3x next door in 12 months and then again one month later a couple doors down for 4x in 13 months! Look at this distinctive burn mark on my stems. There were other pictures like this on the internet and now they are gone? Saw them when typed in Vikane damage. Now not there? Just found this document that shows the damage when high levels of Fluoride are introduced and shows the same pattern I have on my big green leaves all over the place. The only reason this is accessible is because from Korea. This info blocked from Americans by Terminix and Vikane makers. Read this study: https://pdfs.semanticscholar.org/e82d/c22d2556acedab1158000241e15e13ba1835.pdf