Corydalis heterocarpa (Japanese Fernleaf Corydalis) [15 Seeds]

$4.25

Germination Information: I recommend these seeds only for gardeners with experience sowing challenging perennial seeds, because there’s little information about germinating this species. I used my standard corydalis protocol to start the original seeds: Sow about 1/8″ deep as soon as you get them (summer to early winter) and set the pot outdoors in a protected spot, so they can sprout whenever they are ready. As I mentioned in the description, the plant can self-sow freely once you get it to flower in your garden.

Note that this information will not appear on the seed packet you receive.

Please read the description as well before ordering.

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Description

I purchased seeds of Corydalis magadanica and they turned out to be this species, C. heterocarpa, instead. I can’t say I’m too upset, though, as it has been exciting to watch its progress. Last year (its first year), it formed a lovely, 18-inch-tall mound of deeply cut, blue-green foliage. At that time, it was growing in full sun and seemed perfectly happy there. In fall, I had to move it to a different spot; it is now growing in a site with a few hours of morning sun and shade the rest of the day, and it seems fine there too. It began flowering in the third week of April, at about 1 foot tall, with clusters of yellow blooms, each marked with a grayish plum spot. It continued producing new blooms through May and reached about 2 feet tall by late May. The ultimate height is supposed to be around 3 feet.

It’s my understanding that this species can self-sow freely, just so you know. It was fully hardy though my PA (Zone 6/7) winter, even after having been moved. I have seen the hardiness zone range reported as 5 or 6 to 9.

I started collecting these seeds in late May 2021. At least 15 seeds per packet.

Please read the germination information as well before ordering.

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