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Heart-Leaf Milkweed (Asclepias cordifolia) seed

Posted by mary_littlerockar 8a-7b mid Arkansas (My Page) on
Mon, Jul 8, 13 at 10:33

Based on photos of this milkweed, posted to another thread by Mark (wildflowerman_2000), I purchased seed and would like to try growing this lovely milkweed.

I would love to hear from anyone having experience with Heart-Leaf Milkweed (Asclepias cordifolia) milkweed.

Should the seed be cold stratified and if so, for how long? I've kept the seed in the fridge but don't know how long to hold them before attempting to germinate. Since their native range is west coast and rather dry, I'm curious about the method of germination.


Follow-Up Postings:

RE: Heart-Leaf Milkweed (Asclepias cordifolia) seed

Check out Butterfly Encounters for information on how to grow this milkweed. I know he has it for sale. I've tried a couple of times with no success.

Good Luck!


RE: Heart-Leaf Milkweed (Asclepias cordifolia) seed

Thanks, Sandy. If you didn't have any luck, then it's probably a losing cause. This milkweed has such a lovely bloom, I just had to give it a try. I've lived in California and know how different the humidity can be in our neck of the woods, comparatively speaking. And if these plants naturally grow at higher altitudes, then the daytime temps would be what we'd consider lovely spring or fall days, temp wise. So maybe we're fighting both high temps and humidity here.

I received an email from Joyful Butterflies, the on-line vendor where I purchased my seed (BTW, beautiful big healthy looking seed) and she wrote to say her on-line growing suggestions were to be discarded. She now believes the seed needs more cold stratification than she originally thought. I'm going to hold the seed in the fridge for two months and then try germinating half my count. Will keep back half in case this try is unsuccessful.


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