Looking after alpines
I have just invested in a new greenhouse, part of which is dedicated to growing alpines, in pots plunged in sand on a tray table. I was inspired by the wonderful alpine house at Wisley which is awash all year with the most perfect minature marvels. I don't want to grow alpines outside.
My question is how do I look after the plants ( minature daffs, tulips, irises, saxifrage,eranthis,cyclamen etc.) when they finish flowering, so that they reflower just as well next season? I could bin them and invest in new plants next year to be safe, but I would much rather succeed in keeping them going. What is the care regime, watering, feeding etc.?