There are tiny black bugs all up and down the stems. One new flower is now dead before opening because of this. What do I do??
There are many, many things that you can do for insect control. This one is a pretty easy infection to treat. These articles will help:
https://www.gardeningknowhow.com/ornamental/flowers/calendula/growing-calendula.htm
https://www.gardeningknowhow.com/special/organic/what-are-organic-pesticides.htm
Do they flower all the time like wouldn't have to replant them
This flower is an annual, but it easily reseeds itself. Here's an article about calendula: https://www.gardeningknowhow.com/ornamental/flowers/calendula/growing-calendula.htm
with them over the autumn and winter months? Pricked out seedlings, and now repotted these new baby plants. What do I do with them now over the coming autumn and winter months?
I would certainly keep your little plants in a greenhouse or inside if you have frosty weather in the winter. Here's an article to help: https://www.gardeningknowhow.com/ornamental/flowers/calendula/calendula-winter-care.htm
Dear Staff, is it normal that 6! new flower comes out from 1 flower? There are a lot of blossom on one stem calendula. Thank you
Aster yellows can cause this abnormality in calendula. Look for other oddities like green, misshapen flowers or leaves coming out of the center disc.
https://www.gardeningknowhow.com/ornamental/flowers/calendula/common-calendula-problems.htm
https://www.gardeningknowhow.com/plant-problems/disease/aster-yellows-disease.htm
I saw an article re gardening in Central Texas that had a to do list for February that included calendula transplants. Really?
Calendula is frost tolerant, so yes, it can be planted early in warmer zones. Here is more about growing calendula:
https://www.gardeningknowhow.com/ornamental/flowers/calendula/growing-calendula.htm