Potting on perennials
Hi I am new to this forum and based in Cambridge,UK. I am also very new to gardening.
I bought a number of young perennials - yellow storkbill, potentialla arc de ciel, night whisper daylily, tangerine dream coneflower and alstroemeria inca exotica in containers in March this year. I immediately loosened the rootball and potted them into a pot with compost 1-2inches larger than the original. The plants have all successfully grown and currently flowering. I realise that I can see some visible presence of roots through the bottom drainage holes - however the roots are not coming out of drainage holes yet. I have read so many suggestions but I am still unclear when to pot onto a larger container. Post-flowering in Autumn which will help protect roots over winter or next spring?
Any suggestions would be much appreciated.