Your stratification will be complete by December: could you then grow the germinated seeds indoors (in a cool basement) under fluorescent lights? When spring comes, the plants will be large enough (6 inches tall) to plant outside.

I think the longer the seeds are in the hips, they exert a hormone to allow them to germinate later. So i would think your answer is probably leaving the seeds in the hips a little longer and refrigeration. But how long i wouldn't have a clue. You may have to experiment and stagger your de-seeding and refrigeration times. This is probably more of a question to be addressed in the rose propagation forum.

You won't know the way things work in your area until you start trying.
And some folks who hybridize roses in hot climates have found that the first seed set is the best. Some find little success with second and third trys in a season, even though their skills and plants are the same.
Germination time will depend on which classes of roses you're working with.
And there's lots of discussion on the Rose Hybridizers Association forum, a group you might want to consider joining.
They also sell a CD with the newsletters from many, many years of members talking about what works. It's a great read for a hot long summer.

Here is a link that might be useful: RHA forum

I just harvested some rose hips yesterday, and started stratifying them today, this is my first time doing this though. i just more afraid because the mother plant must be a relative of the chinas because it was stting blooms about february and through the winter, and i keep wondering what to do if the seeds arent germinated by 8 weeks or if they start germinating early. What do i do?

Thanks for all the feedback. I've been in and out of the rose hybridizer forum and they are helpful. Whats probably gonna end up happening is that they will germinate in the fridge and I'll plant them under a grow light until its warm. I need to make a list.
Buy grow light
Get some kinda thing to put plant on under grow light
Get small pots...what kind of pots? small terracotta? Peat?

Ugh thing is that when school starts back it will be my senior year, and after that summer has passed I'll be off to college away from my roses so I kinda only have one shot at it now.

to psycho:

i feel the same way! but next year i'll be a junior, as to the pot situation i think they mean like those plastic pots that you can get from a nursery when they have extra or if you save your pots after planting annuals and perrenials. I have millions but they are a scattered mess all across the back porch... -_- oh well. i think i'll do the same for if they start growing in november or september...luckily winter here is almost non-existant!

Psycho,
Pots: styro coffee with half of bottom cut out for drainage work well.
Potting soil: good drainage is essential! 1 part Fafard 3B plus 1 part perlite works well for me.
Lighting: keep topmost leaf as close as possible to fluorescent tube.

I'll check out North Haven Gardens in Dallas, I saw some seed starting mix out there, and maybe pick up a grow light then too. I just really want everything to work out as I crossed some unusual colors with each other.
Yay for Ebb TidexTropicana (purplexorange)
Don't ask me what possessed me to mix those two colors, but since it's my first time I have absolutely no idea what to expect.

I also did scentimentalxStike it rich. (kinda a peppermint lookxlighter orange)