Every time I grow chives, they end up being taken over with very small black bugs. Can you tell me what they are and how to prevent this?
This sounds like aphids. This article will help you:
https://www.gardeningknowhow.com/plant-problems/pests/homemade-aphid-control-a-natural-way-to-kill-aphids.htm
Help, our chives have taken over! How do I get rid of chives that have gone out of their bed into other parts of the garden?
Dig them up and move them. Also dead head the blooms to prevent seeds from falling and starting new plants. Or you can take a small paint brush and "paint" roundup on the ones that you wish to illiminate. Good luck!!
Do I spread the seeds around the flower pot or put them in all together in one spot? What size flower pot do I need? What is the minimum number of seeds I should plant in a flower pot? This is a first for me and I'd like it to be right.
Spread them out or you'll have to thin them down once they come up. The following article should be of some help to you as well: https://www.gardeningknowhow.com/edible/herbs/chives/how-to-plant-chives-growing-chives-in-your-garden.htm
Are chives invasive?
No, not to my knowledge. They are not considered invasive. Here is some growing info: https://www.gardeningknowhow.com/edible/herbs/chives/how-to-plant-chives-growing-chives-in-your-garden.htm
Why are some of my chives getting purple flowers on them?
Chives are flowering plants. You can eat the flowers the same as you can eat the leaves.
My garlic chives are bulbing. What do I do with them: eat them, plant them, etc. ?
These plants can be used and stored in the same manner as regular chives.
I grow chives in my garden and I would like to know how to dry them.
This article can help you with drying chives: https://www.gardeningknowhow.com/edible/herbs/hgen/how-to-dry-herbs-various-methods.htm