Lucifer here stays in its spot as well - it increases, but not too dramatically. In fact, (and I really just noticed this) Ember Glow is edging into its space.
It's that time; the time when the floppers need to get out of the way of others...even the chunks of wood will only hold them up for just so long.
Time to rustle up some empty containers!
If for no other reason, you could grow them in a sunken container for cutting flowers. I'd bet that if their roots were confined they'd be quite easily manageable; both in height and in maintaining their space.
