Just keep it watered. Not soggy or with standing water, but moist. They have very small roots so far, so any day there's no rain you should probably water them. Once they get bigger, you can cut back on the watering.
cass2828 wrote:thnx a lot.... by the way I turned my compost bin now and I notice that its not hot... its cold in fact... what should I do? What am I doing wrong?
Variety? Not sure. Likely one of these: Correnta, Bloomsdale, Melody.
I have grown all of these.
Remember, plant early. Spinach is a Spring cool weather crop.
Taiji, we have quite a difference in zone and weather conditions I am sure. I can't say much about growing spinach in Az.
Just remember to try it during the cooler growing conditions either Spring or Autumn.
Cass2828, If you are going to grow in containers of that size, you only need to put about 3 or 4 seeds in that container.
You can try to transplant, but spinach is best seeded where it will grow and not seeded too thick. It can be planted out in the soil of the garden as soon as the snow is off and the soil can be worked.