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Your soil may be lacking phosphorous. Without enough phosphorous, plants cannot bloom. Add some bone meal to the soil around the plant to add phosphorous. Here is more information:
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/phosphorus-plant-growth.htm

The soil may be lacking enough phosphorus, which it needs to produce blooms. Try giving the plant some bone meal to add some phosphorus.

It's quite possible that they're getting too much fertilizer, especially nitrogen, which promotes more foliage growth than flowers. It can also reduce the viability of seeds. Ease up on the fertilizer or use one with more phosphorus, which promotes flower growth. Also, you may want to start plants earlier. It could be that they had a late start.

Provided that they share the same or similar growing conditions, I don't see why not.

Your soil may be lacking phosphorous in some areas. Without enough phosphorous, plants cannot bloom. Add some bone meal to the soil around the plant to add phosphorous. Here is more information:
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/phosphorus-plant-growth.htm

The soil may be lacking enough phosphorus, which it needs to produce blooms. Try giving the plant some bone meal to add some phosphorus. Here is more information:
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/phosphorus-plant-growth.htm