Beans do well inside with the proper lighting. They grow well at room temperature. Peppers and tomatoes need more warmth. My basement runs 55 F in the winter. But the LED lights in the grow tent bring it up to 77 F. I started the beans in December . I placed the beans on wet paper towel and then placed it in a plastic bag. In about 2 weeks the seedings had a long root showing.
I set the seeds in a dark box for a week. warmth helps.
The bed was set to flood every three hours. Between floods, the pebbles remain moist and the roots get air.
I planted the seedlings directly in pebbles with no soil needed.
After a few days I noticed the some were dying and the others were growing.
I think the depth of the root in moist pebbles made the difference. Some seed husks were stuck on the plants. Removing the seed husk after the seedling turns green my help.
During the next couple of weeks, the beans had rocket growth.
I used 10-5-14 General Hydroponics Maxigro Fertilizer.
Now I have beans growing larger than I expected. I had to tie them up. They tend to grow over to the center of the light and them soot up from there. But I tied them around the walls with string. Notice that there are no holes in any leaves. There are no insects that I have seen. I cross pollinate the flowers with a paint brush.