Night Blooming Cereus

I have had a bumper crop of night blooming Cereus! I counted 24 blooms. Twenty one of them opened the same night! I have 5 plants growing in pots. I leave them in the same pots till the roots split the pot; they seem to bloom better that way. I put them inside the greenhouse when the weather cools off, usually about mid-October. Since the plants are so large and ungainly I coral them with a rope. In the summer I stand them against a rickety wire fence. The treatment seems to agree with them. Over-watering is not a problem since they are so root bound. I do water them several times per week and fertilize haphazardly. They generally open about 9 PM and by 7 AM they have turned to mush. Short-lived, but so beautiful and fragrant! They are about the size of a dinner plate