This should provide more consistent fertilization. Time-release fertilizers also are a good solution. They release a tiny amount of fertilizer each time the plant is watered. You apply this type of fertilizer once a season. When selecting vegetables for container planting, choose a variety that will grow well in confined spaces.
Miniature varieties are best.
Choose plants that need a minimum of added support and those that will produce a large enough crop to make your efforts worthwhile. Cooperative Extension can provide a list of varieties recommended in Colorado. When planting vegetables, remember that some are cool season Crops, such as lettuce and spinach and others are warm weather Crops such as tomatoes, peppers and cucumbers. The average date of last frost in Denver is April 26. For higher elevations, add a few weeks.