What a difference a month makes! In case you missed it, here's what this pot looked like last month. Started in the basement under lights, the first nasturtiums were spindly and sad. During the past month, three of the original sad nasties expired. The three that remain have sprouted more leaves, and look much better. The seedlings started after the pot went outdoors are much happier and healthier-looking, and even cover the spindliness of the lower stems of the older ones.
Having never grown nasturtiums before, starting them in the basement was a learning experience. What not to do: Don't try to get a jump on the season with nasturtium seeds by starting them indoors. Even my expensive, high-powered sodium grow light doesn't provide the right light to produce sturdy, happy nastie seedlings. While adequate for stocky veggie seedlings, and overwintering tropical and tender plants grow and bloom happily under the light, nasturtium seedlings seem to need natural, full-spectrum sunlight for healthy growth.
Now that that's settled, I'm enjoying the cute round leaves on the happy nasties, and looking forward to buds and blooms.