P.alata is a tall climber that produces fragrant flowers which are around 5 inches wide. P.antiquiensis is a vigorous climber which flowers usually 5 inches or more wide.
Use a soil which is equal parts loam and peat with another quarter part of coarse sand. You can pot them if you use a large pot.
Prune them in February, remove weak growth and shorten the strong shoot by one third.
Keep the temperature between 18-24oC between March and October, between October to March keep the temperature between 13-18oC.