January & February is when many gardeners begin to think about what they want to grow during the warmer month. This is when most gardeners start ordering their seeds for spring & summer.
August & September is when many many gardeners begin to think about what they want to grow during the cooler months. This is when most gardeners start ordering their seeds for fall & winter.
If you are interested in starting plants inside, use the Expanding seed starting soil pods will to make starting seeds much easier.
Here are some related links/blog posts that will help related to seed germination:
Getting Started: A Guide to Starting Seeds Indoors
How to Get Even Better Seed Germination
Tips for Successfully Starting Your Seeds Indoors