You've gotten your raised bed set up...now what? I recommend that if you are a first time gardener, you buy plants to start. Success in your first year makes you more likely to continue on to your second year. It will cost you more up front, but will give you a jump start as you figure everything out.
Of course, there are also those plants that grow just well by plunking a seed in the ground and calling it a day. Below is a list of common backyard vegetables and herbs and whether you should buy plants/start seeds or sow in the ground.
Buy plants/Start seeds:
Basil Broccoli Brussels Sprouts Cucumbers
Eggplant Squash Sweet potatoes Tomatoes
Sow in ground:
Beans Carrots Corn Garlic Kale Onions
Peas Potatoes Radishes Spinach
To save even more money on your garden, seeds are the way to go. Buying through seed catalogs will give you a greater selection and larger quantity of seed for your dollar. You will also be able to buy heirloom seeds to grow vegetables that you could never find in a store because they don't transport well. They often taste better, as well. However, for a very small garden, the seed packets sold through seed catalogs often have more seeds than you can use in a season and you will need to store them. Shipping can also be cost prohibitive. When just starting out with one raised bed and starting your own seeds, it is fine to buy the small packets at your local garden center.
There are as many ways to start seeds as there are people who garden. You can start them in trays in a window sill. You can grow them under lights in your basement. You can start them in eggshells, egg cartons, toilet paper rolls, and on and on and on. Here is my two cents on starting seeds. I have tried a few different trays and some egg cartons, with not much success. I am terrible about over-watering and under watering. I also lack the space in areas where they will get enough sunlight to not have them in the way of everyday life. So, I'm trying something new this year. I have been saving milk jugs for a few months. I am going to cut them open, add soil and seeds, tape them back together. I will then set them outside without the lid, so that they can get some moisture, in an area that gets lots of sun - essentially making little individual greenhouses. The bonus to using this method is that I won't have to harden off the plants to acclimate them to the outside conditions, like I would have to do with plants started inside.
I will start the first of my seeds this week (February 15). Here is my schedule:
Week of February 15:
Week of March 1st:
Week of March 15th:
Week of April 5th:
Sweet Potato slips
It is very easy to get excited and plant a bit of everything or what you picture you should be growing. I say take stock of what your family eats most and plant that. You could grow the most beautiful radishes around, but if your family hates radishes, your time and effort were wasted.