My most unusual are Desert Roses/Adenium Obesums that I am growing from seed. I have tried two batches and I can get them to germinate, but I find they are difficult to keep growing during the winter when they must be kept fairly dry especially if they go dormant. This 2nd batch has been more sucessful and I now have 5 nice young 14mth old plants. Hopefully I will get them to flower. They like lots of light and heat so I realise I will be lucky to keep them thriving. I saw my first one in Bangkok a few years ago and fell in love with them as they can grow huge swollen caudexes. I have only ever seen them for sale once in the UK and they were pricey. I also grow plumerias, strelitzia, several types of palms, echiums, various orchids, and far too many other plants, or so my d/h keeps reminding me.

I'm quite keen on growing stuff from seed exchanges - even if I've never heard of it before. One plant that I've got from this source is Vincetoxicum scandens (sounds appealing, NOT) - it's very hard to get any info about this in garden books and so far it has not flowered. It's probably a noxious weed in some far-flung part of the globe so I've always wondered how it ended up in the RHS seed exchange. Maybe this summer I'll find out if it was worth growing or not!

If anyone has any idea what it is I'd be glad to hear. It is a slender, herbaceous, twining climber.

Great idea for a thread, BTW.

Vincetoxicum is a perennial to approx 1.5m and can be shrubby or climbing. It has a milky latex; flowers white,yellow,reddesh-purple or greenish.
The ecology is woodland, rocky banks and and scrub areas. The genus has around 15 species 11 of which may be found in Europe, 8 in Turkey and the rest mainly in western Asia.
These unusual plants are sometimes grown as curiosities.
The family is Apocynaceae (sometimes Asclepidaceae)by some authorities.
I don't suppose I will have told you anything that you don't already know, but there is not much to say about this plant - certainly interesting to grow and see what you can make of it.