Do bell pepper plants live through the winter? I live in Portland, Oregon.
They will not survive outside, but you may be able to overwinter them indoors. Here are directions: https://www.gardeningknowhow.com/edible/vegetables/pepper/overwintering-peppers.htm
Will my red bell pepper plants from this year come back next year or do I need to start new ones?
They are annuals in most parts of the world, so you will need to start new ones next year.
Can you grow bell peppers near corn? What are companion vegetables for bell peppers?
This article will help you:
How tall do the bell pepper plants get, and should they be kept pruned?
They normally don't get much higher than 4 feet tall. Some people do prune them, but they do not need to be pruned. Here is some information on it:
I currently have bell peppers, summer squash, and a tomato plant in my patio garden. I want to know if they can survive in pots or if they need to be planted in the ground.
The peppers and tomatoes do well in pots. Squash plants can be grown in pots, but they need a lot of water, so make sure that you are giving them enough water to grow well.
I have also grown tomatoes in pots, had a good crop last summer, watering well essential.
How long do I have to dry out fresh seeds before I can plant them?
You don't need to dry the seeds to grow them. You only need to dry them if you plan on storing them. You can plant them as soon as they come out of the pepper.
If I am watering too much, how do I know when to stop watering? Or how much to water? Last year my tomato and bell pepper plants did not get big and the fruit was so small. I am hoping this year to do better.
This article will help you with this: