Can I grow my green beans in soil that was used for garlic last year? Can I grow garlic beside my green beans?
Yes, you can grow beans and garlic together or where one or the other was growing. You can grow the beans up just about anything as long as their tendrils can hold on to it. I am sure your trellis will be fine.
My bedding out plants start to grow but then the tops of the the plants shrivel up and die. I water them a lot. I'm trying some green beans.
It sounds as of damping off is a problem. This article will help with that: https://www.gardeningknowhow.com/garden-how-to/seeds/what-is-damping-off.htm
My pole bean leaves are curling and turning brown on the edges. What's up with this? I have looked for bugs (none I can see) and put on some extra Ironite. I live in the Austin area and have a two foot raised bed. I even put some Sevin Dust on them, but the problem still persists. What am I to do?
The plants are underwatered. Increase watering. If they are currently getting water, check for bugs on the roots that are restricting water.
We are expecting a frost tonight and we have green beans, corn, tomatoes, peppers, and cauliflower up and producing. How should we go about covering up everything, or will a sheet draped over be sufficient?
Yes, a sheet will be enough. This article will help you:
https://www.gardeningknowhow.com/plant-problems/environmental/frost-how-to-protect-your-plants.htm
Do you have to trim or cut the bean vines as they are growing? My beans seem to want to go on clumbing, feet after feet after feet. Should you just wrap them twice around the poles, or should you cut back to stop growing so high?
Never heard of anyone removing pole bean shoots. Just provide adequate support and let them grow. This article will help with growing them: https://www.gardeningknowhow.com/edible/vegetables/beans/pole-bean-supports.htm
Do some [green] vegetables need to be planted in pairs? A friend says I should plant at least two green plants in order for them to produce well. Is this true? I have a very small balcony off my apt and wanted to try one 'bush-type' green bean plant to see how well it turns out.
No, not normally. There are some kinds of fruits that need to cross pollinate or produce better if they can cross pollinate, especially fruit trees. But this does not happen too often with vegetables. Most vegetables do fine as long as they have pollinators (e.g. bees) to pollinate their flowers.
I am growing green beans from seeds, almost a foot tall. Do I force growth by pinching deadheads in stage?