Check out the pics on this website. I think they will answer your questions. Dave Here is a link that might be useful: Florida - Wild Grapes and Tame Grapes

I love my seagrapes! & yes! I agree seeds are the easiest way to propagate them.Look for seedlings & carefully dig them up & pot them. The fruit is VERY yummy, tho very thin-fleshed - & problematically, the fruits fall off when fully ripe(dark, plump & soft) & they ripen individually, so it's difficult to harvest any significant number @ 1 time = ( However, I've been grazing on mine lately (what I can reach) & I probly look like a nutcase to passersby = J & those pesky fallen fruits don't sprout very much if you let the fallen leaves remain in place. HTH Here is a link that might be useful: SeaGrape @ Floridata.com

You might want to go on the Florida forum although this is a native outdoor plant for that warm zone. Is it possible it's a problem with humidity? (not enough) What I read on google sites, the sea grape is easily sprouted directly into the earth so if it grows roots that easily you might be right about the potted roots being crowded. If it can't easily form the smaller water absorbing rootlets it might not be getting enough moisture both above and below the soil. Another thing, is the window site any sunnier than in previous years (loss of a tree or hard trimmed shrub)?

Here are a few Google results, from a search for 'Coccoloba uvifera germination', that you might want to check out: B&T World Seeds (instructions near bottom of page) eHow (not my idea of a reputable source, but maybe worth a look U of Fl Coop Ext (see table 1)