Here in Germany we recommend to divide and plant bearded irises between August and September. I personally do it often in spring while blooming, but the chance is that you miss flowers in next spring.
They need full sun and a well drained ground. A sandy soil with stones or pepples is far better than loam. Cold temperatures in winter are not a problem.
Never allow the rhizomes to be overgrown by weed. For best results take them out and divide after four years or so.
Here the irises grow after flowering and go dormant in winter, but in the Mediterranean we have the most intense rainfalls in winter. I remember that I've seen flowering irises at New Years Eve in Madrid once.
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Hybrid Mode
