On February 6th, I noticed that our first ulluco seed had sprouted in the greenhouse. In the three weeks since then, it has grown pretty rapidly, judging by the results reported by Lempiainen in 1989 in the paper Germination of the Seeds of Ulluco. As of today (day 21), the seedling has opened 3 sets of true leaves. It became alarmingly top-heavy and bent over almost to the soil, so I shored it up with some additional potting mix. Normally, I wouldn’t provide such a detailed blow-by-blow for a single seedling, but ulluco seedlings don’t happen every day, every year, or even every decade. Hopefully, this is a first step toward changing that.
|Day 1: cotyledons just breaking the surface|
|Day 3: cotyledons open and hypocotyl lengthening|
|Day 6: hypocotyl reddening|
|Day 10: Red blotches developing on underside of cotyledons|
|Day 13: Developing epicotyl just visible|
|Day 17: First true leaves open|
|Day 21: Multiple sets of true leaves|