Since these are containers they will require regular feeding as the nutrients leach out every time you water. Many on the container forum recommend feeding weekly using a 1/2 strength dilution of nutrients. Some dilute it to 1/4 strength and feed it with every watering.

Bone meal like most granular organics doesn't work well in containers as there is no active soil food web to convert them to useful nutrients as there is in dirt. Liquid organic fertilizers work well but not dry or granular.

Plus bone meal is very slow acting - like 6 months from now. So it pays to understand your fertilizer and how it works for best results.

Peppers are even less tolerant of high nitrogen fertilizers than tomatoes are. Fortunately most liquid organics are well balanced.

Pumpkins and squash are both fairly high P demand plants but again a granular organic is going to be slow acting.

You can learn much more about growing in containers and the unique needs of container plants over on the Container Gardening forum here.

Dave