Yes it can. Bucephalandra are naturally found growing emersed. You can grow them emersed yourself, but I believe they need to be kept moist so they don't dry out, which would require retaining a high humidity enclosure or a set-up that would frequently spray the plants.
But do know that emersed grown Buce do not have all the nice coloration that you typically see in pictures of submersed Buce. Emersed Buce generally get dull green and don't have all the red/blue/etc. that you see in submersed grown pics. Those sparkly specks aren't usually there either on emersed grown Buce.
What is the most profitable aquarium plant to grow? You said there are better ones to grow than BuceI don't have first hand experience growing it emersed, but I believe most plants do grow faster emersed. However, Buce is still a slow grower regardless.
Not sure if your intentions are to grow and sell, or just to grow out Buce faster for your own scaping desires.
If it is to grow and sell, I very much doubt it would be worth the time and effort. Sure you may make some money, but if profit was the goal, other plants might prove more profitable. Importers can get harvested emersed Buce clumps for a lot cheaper. Besides, some people don't like to buy emersed grown Buce as they don't want to go through the hassle of the transition phase to submersed growth.
If you don't have much to spend on Buce and you just want to grow it faster emersed to have more of it to plant with, you could do that I guess. But again, the emersed growth does not look nearly as nice as submersed.
Buce is getting pretty common now and is very affordable (many Buce variants costing just as much or even cheaper than Anubias and Java Ferns), at least in the U.S.. If you have some extra money, it may just be better to spend a little more for the larger amount you want rather than take a long time to grow it out. You can even buy nice sized emersed clumps for good prices.
May I ask where you see these price drops in Buce? I checked Petco, Petsmart and a local neighborhood fish farm as well as online from Thatfishplace.com and liveAquaria.com.Yeah, Buce likely grows faster emersed, but it is still categorized as a slow grower compared to most plants.
Not sure what plants are most profitable, but pretty much most plants would grow much faster than Buce, and so, you would have more to sell, even if each individual plant/cutting is worth less. For example, even most of the basic cheap plants (common Rotala, Ludwigia, Bacopa, etc) that are worth only 50 cents a stem, or $3 a bunch (5+ stems), those that grow much faster than Buce, would mean more amount to sell and more often, which would bring in more profit compared to the selling slow growers like Buce. Maybe back in the day when Buce was new to the hobby and super expensive, then it might have been worthwhile to grow it for selling. Right now, Buce prices are similar to Anubias and Java Fern.
In my experience, Cryptocoryne, Java Fern, and even Anubias (slightly) grow faster than Buce.
Emersed grown Buce is often sold cheaper than submersed grown. The transition from emersed leaves to submersed leaves isn't as pretty and quick as you may think.
Buce importers have dropped prices tremendously. Import legally or illegally the plants are really cheap and sellers are flipping them and making good profit from what I see. shhhh...I get my buces for a $1(probably just killed my sales) a rhizome at least 7 leavesMay I ask where you see these price drops in Buce? I checked Petco, Petsmart and a local neighborhood fish farm as well as online from Thatfishplace.com and liveAquaria.com.
The people there have never even heard of this plant. In fact, the first I heard of it is when I was asking around for a exotic plant for my aquarium on this forum.
I would love to know where you find this plant available and inexpensive so I can buy some? The only people who seem to have this are a few select members on this forum as a few sellers on Ebay who sell for like $15 for a small piece.