I live in New Zealand. I have some gomphocarpus seed here (giant swan plant) which I would love to swap for syriaca, or sullivantii, or purpurascens seeds.
I am interested also in seed from any varieties of milkweed with big broad leaves which grow from a rhizome or similar and are hardy to frosts and snow.
I am happy to pay for seed if this can be arranged..
If you can help please email me email@example.com