Cardinal Flowers Sown from Seed
This is an update to my original post and video about how to grow Cardinal Flowers from seed. The Cardinal Flower seedlings sprouted. However, germination rates were better than I ever would have expected. Apparently Cardinal flowers are fairly easy to germinate from seed.
Cardinal Flower Seedlings Germinated
I looked at the tray about 10 days after sowing the seeds. There were a bunch of green specks covering the top of the seed starting mix. Without magnification you could barely see the leaves but it was clear that my Cardinal Flower seedlings sprouted.
I had followed the instruction from the website of a fellow gardener when I sowed the seeds. The advice was to scatter the Cardinal Flower seeds on a small tray of seed starting mix then pick out the sprouts later. This would have been ideal if the germination rate was low. It seemed that nearly every seed I had sown germinated. This left the seedling tray severely overcrowded.
It came down to survival of the fittest. Some of the Cardinal Flower sprouts had matured faster than others. As such I removed all the smallest sprouts. This left me with about a dozen Cardinal Flower seedlings after thinning.
Cardinal Flower Seedlings Transplanted
Once again, I thinned out the sprouted Cardinal Flower seedlings. Using a mix of potting soil and a small amount of coconut coir I transplanted the remaining six seedlings into a cell pack. I was very cautious when transplanting the fragile seedlings, the roots were still very tiny.
They’ve been in the cell pack for a couple of weeks now and they’re doing fantastic. I looking forward to planting them in the garden. Perhaps I’ll put a couple near the little pond I built last year.
What Would I Do Different?
In hindsight, had I known the germinate rate would be so high, I would have used a six-cell pack from the start and put only a few of the Cardinal Flower seeds in each cell.