Seedling Twin

[shadypeeks]

This is my first grow. I live in the SE US and it has been unusually cold and rainy. I planted a few seeds of 8MH from Mandala in early March so they have been growing for 3-4 weeks at this point. I set them outside during the day and bring them inside at night.

One of the seeds grew a small twin. After 2 weeks or so, I dug down, pulled the twin out and planted it. It has been planted like this for nearly 2 weeks and hasn't done anything except look like a happy little seedling. Images attached of the small twin that was pulled and planted and the stronger seedling that it was pulled away from. Also attached is a pic of all three, the taller lady on the right is who the twin was picked from.

Will this thing grow or eventually die?

 

[Only Ornamental]

Twins aren't uncommon in cannabis (and other plants too) but often one doesn't get enough energy, nutrients and space in the shell. Hence, the little of the two most often dies before showing true leave or just when the first pair appears. Because of those shortages, survivors have a hard time getting started and remain weak for some time. That and the interwoven roots make pulling it off from the bigger twin a killing act more often than not. You were very lucky!
Yours looks like being over the worst and may very well survive; cotyledons are still greenish and un-wilted and it's already at the second node. Might remain a few weeks behind normal development but that should not be a problem, right?
Different types of plant twins exist and depending on which one, your chances are higher or lower: Two different seeds in one shell = good, true twins (first normal cell division after pollination separates into two seedlings) is risky but can work. The third one is something where the meiosis went askew and resulted in a second fertile gamete; this usually results in a dead seedling a few days after the shell cracks.

 

[Midnight Tokar]

My last grow I wanted to do a small seed run, I started 10 seeds and 9 sprouted. One of the Qleaner seeds turned out to be a twin. I chose to not separate them rather than risk killing one. The taller plant turned out to be a male (the only one) while the runt was a female and was the last to show sex. She progressively grew but not at the same level as the others.

The male twin showed first so I took the twins pot out of the grow room and put it under 2 CFL's on a 18/6 schedule (to let the females catch up) after they had been on 12/12 for about 10 days. I had absolutely no issues with the female twin turning hermie. As soon as I collected pollen I chopped the male and returned the runt female twin to the flower room. I think she finished at about 30 inches and about a ounce of very sticky trichome covered hard buds. Some of the top buds got pollinated from the male twin flowering but I was doing a small seed run anyways, I think I got around 25-30 seeds from the runt twin.

I never had my twin stall out like yours is doing, I wonder if you broke off some of the roots while separating and that is causing the slow growth. Also that Solo beer cup (the twin runt?) looks very dry, maybe that is a contributing factor?

 

[shadypeeks]

I originally had it in a seed starting tray with just soil and now think that it's drainage and general soil looseness wasn't very good. My son kicked the seedling over this weekend so I had to replant it (and did so into that solo cup and a proper soil mix). When I replanted it, I noticed that it did not have any new root development (that was 4 days ago).

Since it wasn't really rooting, I figured that I could take it out again and show you a picture. Looks like I may have f_cked it up because when I pulled it out, it does have new roots now. It'll be fine, and if not, who cares. Regardless, attached is a pic of the seedling with her shiny new roots.

I guess now I have to keep everyone posted on her progress. Will let you all know if she makes it out alive or keels over.

 

[shadypeeks]

Well, this seedling's twin turned out to be male, and preflowered as a seedling (see pic). Since my last post on this thread, this seedling hasn't grown at all. Since it's sibling turned out to be male, I have scrapped both.

2 more planted in it's place. We'll see...