Answer: Although this is one of the hardier pyracantha cultivars, I think the lack of blooming is probably related to winter damage, particularly as it is planted in an exposed, windy location. If you could provide a windbreak, that might help.
Also, this deep rooted plant is very tolerant of drier soil once it is well established. It is possible that overwatering it in the fall is delaying its hardening off process and could increase its susceptibility to winter damage as a result. You probably do not need to water this shrub at all, except under drought conditions when an occasional slow, deep watering would be helpful.
The black on the fruit and premature fruit drop are classic symptoms of scab, a fungal disease. This can be treated with a dormant oil spray, and a through clean-up of any fallen foliage and fallen fruit can also help limit reinfection from year to year. Please check with your county extension to confirm the scab diagnosis and have them help you determine the best time to treat for it, as this is weather dependent.
I hope this helps.
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