Beets are usually sewn directly in the garden. Depending on how far north you are, they can be planted in early spring. In colder areas, warming the soil using a cloche or IRT plastic mulch will prove beneficial. Once seedlings emerge thin out to 5 - 10 cm (2 - 4").
Can be started indoors, but it's tricky. Great care must be taken not to disturb the roots when transplanting into your garden. Also, it helps to sew the seeds a cool place (such as a basement) with artificial lights, as beets tend to get leggy when started in warm areas. (Starting seeds in a greenhouse or cloche often yields better results than starting indoors)
Outdoor Site & Soil Preparation:
A sunny location is best. Deep sandy soil is best. That said, Beets will grow almost anywhere provided the soil is prepared with some compost and/or fertilizer.
Recommended PH Range:
6.0 - 7.5
Recommended Spacing in Beds:
5 - 10cm (2 - 4")
Carrots, Onions, Kohlrabi, Bush Beans, Cucumbers, Lettuce.
Growing in Containers:
Beets traditionally do not do well in containers. However, if there is a good reason to grow your beets in a container you should only grow the globe varieties. Beets go woody (or bolt to seed) if they get too much draught, so be extra careful with the watering of your containers. This is a good way to grow beets for greens.