Each bract that was pollinated will produce one seed, you can get a rough idea during pollination of a small flower by counting the stigmas on the flower and divide that number by 2 (as each bract should have two stigmas unless mutated or damaged) that will give you a good idea of the amount of seeds to expect even if the bracts are not visable in early stages As for too early, never tested at what point stigmas become viable to accept pollination, but I have seen successful pollination as early as one week into flower in the wild. Non pollinated flowers may continue to develop following pollination of other parts of the plant, may be slower than usual or may stop alltogether, but in the case it continues to grow you may be able to pollinate the same plant for a second time if you feel you need more seeds. 9 years late but hope this helps somebody out
