How do i achieve seed form Gerberas? I have some gerberas within a vase and i want to collect...

I have some gerberas within a vase and i want to collect the seed and try to grow the plant. How do i do this?
All i have be able to find out is that they are related to sunflowers
First time growing garlic. what time of year...
Answers:    Read the LINK below. It have total details about the flower and the seed. It even provides you with pictures of what the seed of this beauty look close to.

I would have mistaken their kernel for a dead fly! LOL