November 12, 2026 · Traphouse Nursery propagation journal
Eight tiny seedlings in the cool-night batch, true leaves in another tray, and one plant I’ve raised in a humidity chamber since it germinated. Here’s what I saw and what I’m following next.
Impatiens nyungwensis
8 of 8 seeds germinated. On November 11, I spotted eight germinations as I was putting the container back in the refrigerator. On November 12, I confirmed eight seeds went into the batch. I’d been moving the container by hand between about 72°F during the day and 50°F in the refrigerator at night.
All eight seeds germinated in this batch. I didn’t have a comparison group or temperature readings at seed level, so I can’t tell how much the temperature swing contributed. The plants are still tracked under the seed source’s name.
Early seedlings from my November 12 nyungwensis update. Photo by Traphouse Nursery.
Another view of early seedlings from my November 12 nyungwensis update. Photo by Traphouse Nursery.
Impatiens bicaudata
8 of 11 emerged. The November 12 count matches the October 18 count for the seeds I sowed October 11. Several seedlings have opened their true leaves. The status of the other three seeds is still open. I’ll track establishment separately, and the cohort is still identified by its source label.
Several seedlings had true leaves in my November 12 bicaudata update. This photo shows part of the tray. Photo by Traphouse Nursery.
Impatiens tuberosa
One seedling, about four months old. I’ve kept this seedling in a humidity chamber its whole life. Its foliage looked flawless to me at this check, with new growth opening in the center. I took pictures of the leaves, the base of the stem, and the chamber so I can compare them with the next check.
I could see condensation. I didn’t measure chamber humidity or grow a comparison seedling outside the chamber. This is one plant’s history.
My chamber-raised tuberosa seedling at about four months old. Photo by Traphouse Nursery.
The base of the stem and the surface of the growing medium on the same seedling. Photo by Traphouse Nursery.
I could see condensation on the chamber walls. I didn’t take a humidity reading. Photo by Traphouse Nursery.
Plant names and related reading
I track the seedlings under their recorded names. Kew’s Plants of the World Online gives the accepted names for Impatiens nyungwensis, I. bicaudata, and I. tuberosa. Those references establish the names. The identities of individual seedlings and their parentage still depend on nursery records and later observations.
Read the separate sixteen-pot breeding case study · Research & Experiments · Botanical Exchange
