Place bulbs shoulder to shoulder across the surface of the soil, leaving no space between them. Then top off with more potting soil so the bulbs are just slightly below the surface. Water each container thoroughly, and finish with a layer of mulch.
Combination Recipes…Easy as and 3 Mixed Container with Petunias, Calibrachoas and Verbena. There are 3 key ingredients in making breathtaking container plantings: Thriller, Fillers, and Spillers. This site lists a lot of good options for each.
To be comfortable shooting manual you will need to know what your necessary adjustments are. Though these settings are all numeric, there isn't some insane math equation that you need to do to find out what to dial
Gardening with Epsom Salt - For potted plants, simply dissolve 2 tablespoons per gallon of water, and substitute this solution for normal watering at least once a month --article worth reading - gives lots of great ideas.