Hi, I am new to this platform and plants so excuse my naivity. I have purchased a yucca elephantipes over 6 months ago and have month by month seen the leaves being less perky and becomong yellow. Three weeks back I cut all the yellow leaves off and left the others which were still looking fresh. However the health leaves are slowly becoming yellow as well. I water it roughly once a month and have kept it in the corner of my room since I purchased it as I heard it doesnt need direct sunlight. Considering I live in UK and i purchased it in November, we are only now beginning to experience nice weather/ more sunlight. In regards to drainage, I purchased this from Ikea and have assumed that it already had a good drainage system in place. Any help (as I'm new to having a plant) would be much appreciated. Thanks!