I was able to get pods on 3 different types of C. Pubescens in Florida - a place where they are not really known for being happy to grow (this place definitely puts the "challenging" in most grows, but the C. Pubes were my greatest gardening feat yet). I did not vary anything in nutrients, but the temperature easily played the biggest factor in pod production for me. I couldn't get fruit set at all until our "winter", where the daytime temp average about 70F and the nights occasionally drop down to the 40s. That's when I got mad pod production. The combination of cooler temps, plus greater difference in night/day temps.
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I'm sure that if you've seen my posts in the past, I have a different threshold for "excessive" when it comes to Nitrogen. I use the same 3-1-2 feeding ratio in coco coir based (custom) mixes. Even at that, I am careful about how much of certain types of Nitrogen that I use. There is definitely a difference in N sources. (obviously the N molecules are all the same, but breakdown products...)
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I wasn't able to get Montufar, but my easiest was the seed sold simply as "red rocoto". Aji Oro did well, and mini reds, also. The Cuzco that planted out were always in small containers, and never did much. I have them slated for bonsai, at the moment.