Lonewolf...It could be from the indoor temps being cool.I'd more so wonder if it's because all Hybrids you crossed are South Africans and may have been stressed in the long voyage here.They just wanted to bloom,be done and rest.
Something to consider

Lonewolf,

I don't know if this is any consolation, but I also have acquired some South African breeds: Little Devil, Lemon Sorbet, & Fanfare which have bloomed. I am not having success in the fertilization of South African X South African. However if you can cross a South African X other variety in either direction there is a higher success rate.

This is by no means information from an expert breeder; I am myself trying breeding for the first time.

The blends that have shown signs of success so far are:
Glimar NoID x Fanfare
Lemon Sorbet x Minerva
Lemon Sorbet x Santa Cruz
Lemon Sorbet x Full House
Full House x Fanfare
Full House x Lemon Sorbet
Little Devil x Full House
Little Devil x Santa Cruz

AJ

Ploidy may have more to do with it, although stress might actually be a factor to consider. Ploidy is the one thing I'm not certain about... some hybrids are Diploid, others are Tetraploid or Triploid... and I'm not sure about which fall into which category.

I wish there was a concrete list of all the different hybrids and their actual Ploidy, so we all had a better chance of getting positive results from our pollination attempts.

This is one subject that I need to study more.

Bulb variety, quality and maturity, right timing, right ploidy, right temperatures, right humidity, lighting all contribute to the success of pollination. The "exotics" are kinda particular about this. Most regular large flowering varieties are not.

There is the general rule to follow about ploidy but sometimes, it does not work. So it is best for you to try/pollinate several times. You may not be successful now with a certain cross but might be successful next season. You might not be successful with a particular bulb but succeed on another of the same variety.

It's a whole learning process that you will need to document whether it was a success or failure. Besides the parents, include dates when you pollinated, what happened (scape dried/seedpod aborted), and dates they failed or harvested. With this, you base your decisions next time you try working on that particular hippie. Been doing this for years but still get hundreds of failed pollinations every season. What works in FL or TX (warmer states) soemtimes does not work for me here in VA.

I usually get most of my failures during winter months even if the hippies are inside at 70F temps. And get very good results starting March/April even if they were grown at the same growing area under the same growing conditions as the ones pollinated in winter. So there could possibly be a "link" on the sunlight's intensity and humidity in the success of pollinations too.

Just try and try until you succeed. Don't give up. Prayers help a lot. Inside a seed is life. A blessing only coming from above.

OK...I posted a reply here too! What's the deal! I swear, my computer is possessed!

I wanted to say that if you are set on making these crosses, I would suggest that you pull off the pollen sacs (anthers) as soon as the flower opens, but surely before the stigma ripens so that you don't accidently get a "self" and the pollination that you intend is the only one that occurs. It only takes a grain of pollen to mess up your well thought out plans. And, I made little caps to contain all the ripe seeds, just in case they seed pod opened whiled I was out of town. Very clever!
Kristi