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The Kerria japonica 'Pleniflora' is sterile. So you can't get seeds from this form. Very easily propaged by layers ? (my dictionary says runners).
Quote from: Onion on September 16, 2009, 07:34:04 PMThe Kerria japonica 'Pleniflora' is sterile. So you can't get seeds from this form. Very easily propaged by layers ? (my dictionary says runners).Easy from cuttings, utterly sterile. When first discovered (in a Chinese garden or nursery) it could not be assigned to a family as the flowers are so fully double as to completely obliterate the structural details. Only when a single-flowered form was discovered years later was it possible to say it was in the Rosaceae. There is a very nice single form 'Golden Guinea' that's worth seeking out. But beware: Doris Page, whom I have mentioned in these pages more than once in the past, had a single, but the flowers of her specimen were small and unlovely. Golden Guinea has quite large flowers, perhaps 4 cm diameter and is entirely a horse of another color.
Great to know someone grows these plants. I guess zone 7 that means your plants must be quite happy . My book, flora, over 20,000 plants by firefly (a great book that ways a ton) says cistus laurifolia is the hardiest of the cistus. So I'm hoping to be succesful growing from seeds It is my experience that seed grown turn out hardier than bought plants. None the less none of these plants are available up here, in frigid alberta , so I'll have to forgo the japonica pleniflora unless I can find a canadian greenhouse willing to ship such plant at a reasonable price . It already sounds improbable. Let me know if you get seeds thanks jc