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Hardiness: USDA Zone 5a: to -28.8 °C (-20 °F) USDA Zone 5b: to -26.1 °C (-15 °F) USDA Zone 6a: to -23.3 °C (-10 °F) USDA Zone 6b: to -20.5 °C (-5 °F) USDA Zone 7a: to -17.7 °C (0 °F) USDA Zone 7b: to -14.9 °C (5 °F) USDA Zone 8a: to -12.2 °C (10 °F) USDA Zone 8b: to -9.4 °C (15 °F)
Propagation Methods: From seed; direct sow outdoors in fall From seed; winter sow in vented containers, coldframe or unheated greenhouse From seed; sow indoors before last frost From seed; direct sow after last frost
Seed Collecting: Allow pods to dry on plant; break open to collect seeds Properly cleaned, seed can be successfully stored
On May 11, 2009, anelson77 from Seattle, WA wrote:
These reseed, but not too agressively, and grow anywhere I scatter the seeds. Sun to part shade, poor soil, moderate to little water. They start blooming in May and keep going most of the summer. The foliage stays evergreen and looks nice all year.
On Nov 27, 2008, Ficurinia from Portland, OR wrote:
I love this plant. It just blooms and blooms. If the orange color turns you off, plant it with some blue forget-me-nots. Oddly enough, mine isn't in full sun, but it still thrives for some reason. It is in a half sun spot and is very, very happy. It does produce a lot of seeds, but I cut them off and throw them out whenever I remember to. I save some as well and have found they make a nice "instant" present for garden visitors. Since they are always in bloom, lots of folks tend to see them and comment.
To collect seed, poppy pods need to be very dry, or they'll rot in storage. It seems that almost as soon as the pods get to just the right, crispy brown stage to collect them for their seed, that they are emptied, so a daily patrol is in order.
All through the summer, there are many opportunities to play orange, blue and cream against each other, but Louise Beebe Wilder, in Adventures in My Garden and Rock Garden, wrote that "...one of the loveliest things in all my garden experience..." [was P. rupifragum (she used that interchangeably with P. atlanticum) in orange blooming with blues like]...seas of [blue] Flax [Linum perenne]...clumps of pale blue Iris...dim peach-leafed Bellflowers...[with white] Madonna Lilies..."
She cautions to keep this freely self-sowing beauty away from tiny delicacies in the rock garden.
Transplant seedlings with as little as 4 leaves if possible, because it gets more difficult the bigger its tap root.
On Jun 21, 2006, digirl from Fort Mill, SC (Zone 7b) wrote:
Just threw a box of wildflower seeds in my garden and poppies are growing everywhere. I really like the foliage , kinda fuzzy. Does anyone know how to collect the seeds on this one ?
On May 23, 2005, PurplePansies from Deal, NJ (Zone 7a) wrote:
I'd give this plant a negative because plants I bought were mislabeled and I thought this plant would be something else.... but in and of itself its an okay plant. I am not a fan of orange so that also detracts (for me) from its merits but for other reasons it is a fine plant.... blue green foliage with tissue papery (smaller than oriental poppies) blooms in a "soft" orange.... (not salmon but not rusty or dayglow orange either sort of a orange juice orange.....)..... plants don't seem to last long in the vase.... easy to grow and easy to grow from seed.... will bloom in the second year.....
On May 22, 2005, saya from Heerlen Netherlands (Zone 8b) wrote:
This perennial poppy is easy to sow and very reliable. It is also continuous blooming untill late summer even early autumn, special if you remove the spent flowers. Very pretty...blooms are elegant waving on 60 cm stems and are 9 cm across. Even in a rainy summer they perform well..don't get floppy at all.
Mind though during deadheading....dirt-marks of its sap cannot be washed away in the laundry..maybe a potential dye plant..?
On Jan 17, 2005, LilyLover_UT from Ogden, UT (Zone 5b) wrote:
Easy to grow from seed. It also self-sows. This perennial poppy blooms the first year if started early indoors. Mine bloomed off and on for most of the summer.
Regional...
This plant has been said to grow in the following regions:
Conway, South Carolina Fort Mill, South Carolina Bellingham, Washington Marysville, Washington Seattle, Washington