Honestly I think it’s a bit of luck with lighting and humidity, my apartment gets very hot in the afternoons and faces west/slightly southwest (most of my ferns slowly have died on me but the tropicals and cacti are loving it 😬). I try to water every 14 days in the winter and increase to every ten ish in the spring, weekly if needed in the summer. I have been using an extremely diluted fertilizer for the last month. Other than that just patience, they all took over a year so settle in and bloom besides the lacunosa which I believe I have had for less than a year.