Potting on perennials

jazzykJuly 16, 2013

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.
Thanks JazzyK

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calistoga_al

With my perennials I am always making more of them either by division or cuttings. Most require cutting back to make a fuller plant, and all those cuttings are easily rooted for most perennials. I have built up good inventories of Altromerias and Daylilies through divisions. Al

    Bookmark   July 17, 2013 at 9:34AM
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jazzyk

Thanks for information regards cuttings/divisions. But to clarify perennials are very young plants so they currently are 4L containers. At this stage I don't think they are mature enough to take cuttings/divisions - I thought you divide them once 2-3 years old. So I was wanted to replant them into a large container but I am unsure whether I can do this now while they are in active growth and flowering or wait til either autun or next spring.

    Bookmark   July 17, 2013 at 12:49PM
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calistoga_al

To determine if my perennials need potting up to a larger sized container, I knock them out of their pots and take a look at the roots. If they are starting to circle the inside of the pot, I will carefully pot to larger size. With most mixes the roots will hold the mix together and not be disturbed when potting up. Most plants will take this move anytime, without causing a stress. If you are using a gritty mix it will fall off the roots, and I would wait for the plants dormancy when root disturbance is better tolerated. Al

    Bookmark   July 18, 2013 at 9:36AM
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