farmerdill said:A week is a pretty short time period. Peppers can take a while depending on variety up to 20 days. Optimum starting temp for tomatoes is 40 degrees C. and drops off rapidly with higher temps. Watermelons usually are pretty fast to germinate in heat. I direct seed, but they are fairly easy to start in a soft drink cup with a good starter mix. They should be up in a week to 15 days.
stone said:So.... Are your tomatoes and pepper seed still in the paper towel?
I'm not a fan of using the paper towel method.
What might work better....
Is to scatter fresh tomato seed, and fresh pepper seed in a larger container, and use a plastic bag as a tent over the pot. This increases humidity, but.... You wouldn't want to place these pots in the sun....
After seeing signs of germination, you will want to remove the tent... Leave the tent, cook the seedlings.