I've just started hybridizing raspberries and last year had set out about a hundred seedlings. They are very easy to start from seed! I had simply sown them about 1/4 inch deep and placed the container within the cold room (40F) for about four months and then out into the warmth and had a high rate of germination. Plants develop very quickly and you'll likely aready get fruit in the second year. I intend to do furher crosses this summer.

Terry

Thanks, Terry.

The information I found was from a Canadian forestry department, and was specifically about native red raspberries. What varieties produced the seeds you germinated with cold stratification?

Do you know other raspberry hybridizers? I read about one guy in Colorado working with blackcaps, and there are three ag experiment stations in the US and one in England that introduced most of of the varieties now in the trade.

You can cross : rasberries, blackberries , mulberries ,dewberries , wineberries ,blackcaps, thimbleberries, boysenberies , and tayberries (loganberries). good luck

Just thought I'd add this:

My grandmother purchased some seedling of very large dewberries from a seed catalog years ago and they did exceptionally well here just north of Houston. Had no problems whatsoever, and if I recall correctly, they were a northern variety. Not sure if this has relevancy to raspberries or not though.

I've also germinated quite a few raspberry seeds and remember them being fairly easy to germinate. I never had to use acid treatment or scarification, just a period of damp-cold in the fridge. I was working with black raspberry, wild red raspberries (from New York state, and upper Pennsylvania),red and yellow domesticated types, and wineberries (Rubus phoenicolasius). All of these kinds, and their hybrids, germinated with only a cold-damp period.

Tom in Maryland

Eskota, I had crossed the 'Wyoming Black' raspberry with a very good thornless red raspberry, and succeeded in obtaining a few plants in which have retained much of the flavor of WB and yet are also thornless, just what I wanted!

I've also crossed both 'Autumn Bliss' and 'Kiwi Gold' with that thornless raspberry. This year will add 'Polana' to my breeding work.

Terry

i had a cousin up in High Prarie Alberta a number of years ago who was trying to grow wheat, but he finally moved back to Viceroy Sask, to take care of the folks farm. Am also into rubus and have some Rubus Hawaiiensis seeds going as well as a few superior selections of Salmon Berry, 'the native of the NW coastal forests all the way to Juneau Alaska. I am interested in hybrids of the Tayberry. The Chromosome # of raspberry is diploid but many other rubus are hexaploids, so a simple cross it is not. Also Salmon berry x Raspberry can be done, but the hybrids are mostly sterile or set few drupes on their berries.

I have a lot of Korean Wineberry Seedlings. It seems to be a better than average wild species of rubus and the fruit is very attractive rich ruby red. The fruit is a bit sticky though. I had hoped to cross it to Domestic Raspberry by interplanting but so far, I cannot tell if any of the seedlings are truly hybrid.
Have a lot of extra seedlings to share. It roots and spreads by tip layering like a black raspberry.

The ideal method would be to pass the berries thru some intestinal duct: your own, your chicken's, whatever :-)
Anyway, I've had quite nice results sowing ripe fruits directly in potting soil. Patience & luck will do the rest of the job.

Here is a link that might be useful: some of my berries