You can erect a misting system, like they have on restaurant patios in the summer time. Put it on a timer, and have it go off for 5 minutes every hour or two. It's easier than standing in front of your plant all day with a spray bottle. Or you can water the area around the plant every morning. Or you can set up a soaker hose on a timer to go off every couple hours around the plant. As it warms up the evaporation will raise the humidity. 👅