I'm sorry to say I don't know what's going on with your seed-grown specimans, but I'm SURE someone will come along, who does.

Do you have any rooted cuttings for trade? If so, please email me. Thanks!

The seedlings will have only 1 leaf for a year. After that they'll begin to put on more growth.

I agree with Karyn. Their growth can be for their first two years, and the seedlings will start to bloom in 3-4 years. I learned this from someone who was very kind to share their knowledge and experience with me. If you would like more information on how to care for seed/seedling of Lapageria I can email you an attachment of the document that he shared with me. Just let me know!