I have done it several times with success. Gather the cones just before they fall apart in the Fall. Put them in a paper bag outside, undercover for the winter. Mine were in my unheated, separated from the house, garage. The cones fall apart revealing the seeds and can then be separated prior to sowing in Spring. Seedlings from Cedrus atlantica, 'Glauca' turned out green both times from different trees. I took seeds from the species 'Deodara' and I got species trees. Mike

A...this thread is nearly 10 years old. I stopped growing 'New Hybrids' 5 years ago, primarily because it self-sowed with such abandon. That said, it volunteered only in garden beds and containers. I saw and have seen no evidence of it 'escaping' cultivation. That would tell me its cross-pollination didn't lead to reversion to species. There still appears to be little, if any evidence of invasive growth of Miscanthus sinensis cultivar reversions. The preponderance of evidence is the invasive stands of M.s. is species, and stem from ornamental plantings of the species over 100 years ago. I get volunteer M.s. every year, in small quantities in my gardens. The most prolific appears to be from 3 copies of 'Gracillimus' which are well isolated from my other varieties, but are in my front yard, and susceptible to cross pollination from the approximately 25 different varieties of M.s. being grown by my neighbors. Not a single one of these volunteers has been a reversion, but bore extremely close resemblance to 'Gracillimus.' A few have exhibited much finer foliage, and I've kept these in nursery beds in the back yard to keep an eye on them. They, like ~80% of my ornamental grasses, get dead-headed every fall.

A quick google search should give you all the info you'll need. Here are a couple of links from the first few results. They answer your questions. HOME FRUIT PRODUCTION-GRAPEFRUIT by Julian W. Sauls (Texas A&M Ag Extension) University of Florida: The Grapefruit (U of F Cooperative Extension)

I have pictures posted in the Cacti and Succulent forum. It took a couple weeks to germinate, and I have had luck with 2 of the 3 species I attempted. I bought seed in 25 packs, have 5 seedlings of one type and 3 of the other. Not a high sucess rate I am afraid. And my Lithops have been sloooowwww. I have some more seeds to sow soon, 2 more types of Lithops and another relative called Titanopsis hugo-schkecteri that I will try in October. And some columnar cacti and agave. Soon, I will have seeds of Dischidia pectinoides and a carnivorous sundew called a Cape sundew from my own plants to try growing. I love the idea of growing fantasy African violets from seed. Though, I do not know much about them, will only some be fantasy type?