I have successfully kept a number of tobacco plants dwarfed in 3" pots for two years of indoor/outdoor growing. Whenever they got too tall, I clipped off the stalk down to a single leaf node. Eventually, one glorious spring, I transplanted them to the garden bed. Some of these had been completely topped down to about 5" of remaining stalk as many as 5 times. Some of them had even been allowed to bud indoors, prior to being amputated.can I keep them small and healthy for months and then move them out in the spring?
Outcome: most of them grew in the field as though it was their very first season of growth. The topping scars were re-modeled to near invisibility. The leaf count, size, yield were reasonably normal for most. I did have a couple of them that died of a heart attack, as soon as they were exposed to the big sky.
Their genetics should remain unaffected by all this, since they are perennials. The issue is that of leaf quality on older plants. The leaf of these seemed fairly average. So they appear to have simply reset their clock.
These are discussed, with photos, in my 2014 Grow Log.
Elderly Tobacco
Bob