Yes, spinach can make for a great container or potted crop.
Because of its small size, spinach can grow well in pots or containers. It's recommended to use a pot 10-12” deep with drainage holes in at the bottom. Be sure to water often and keep the soil moist for your plant and prevent it from bolting.
With sufficient lighting, spinach can also be planted indoors to produce year round.

To keep your spinach plant healthy and prevent premature bolting, it is important to water regularly. Viroflay spinach needs about 1-2” of water every week. Water often throughout the week, keeping the soil evenly moist. The soil should be moist to the touch, but not soggy. Mulching around the plant can help conserve the soil’s moisture.

Yes, after spinach flowers, or bolts, the plant is still edible. The flavor, however, becomes much more bitter.
Bolting can happen for many reasons, but most commonly from too much heat or sun exposure. When this occurs, the plant focuses its energy towards flowering and will no longer grow leaves. This also causes the change in the leaf flavor.
Harvest the remaining leaves as soon as possible, since the longer they’re left on the bolted plant, the more bitter they become.

For full grown spinach, harvest the leaves when they are 3-4 inches in length. For baby spinach the leaves can be picked as soon as they are big enough to eat (around 2 inches). Pick the outer leaves and leave the inner leaves to continue growing for a continuous harvest.