Hi! I just wanted to share some of my favorite tips for caring for this plant. First, let me tell you that I usually place it in an area that gets indirect sunlight. I water it once a week, keep its room temperature between 65 and 85 degrees Fahrenheit (or 18 and 30 degrees Celsius), and its humidity level at around 50% to 70%. This plant likes having well-drained soil, like compost, pine bark, coco coir, worm castings, and perlite. And, of course, it's essential to nourish it with a balanced fertilizer every couple of months or so during the growing season, which, for me, would be spring and summer
Oh, I think I've got it! I can definitely add fertiliser to help the calathea plant thrive. Liquid fertilisers are the way to go.