Answer: Congratulations on the seedstarting! Sorry the eggplants and peppers didn't work out, though. They are in the same family, by the way, along with tomatoes, potatoes and even petunias! They need a lot of warmth to get going, too, more than many other plants. Next year, try germinating them indoors in a warm spot. I face a spotlight on my seedling pots, which means I have to water more often, but the seeds appreciate it. Also, once they are up and growing, peppers grow better when the soil is on the dry side.
Another note -- plants don't need fertilizer until they have their first "true" leaves. The first leaves that emerge from the soil are the seed leaves, and the ones to grow after that are true leaves. That may save you some fertilizer. Best of luck!
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